subject:(Cambrian)

Université du Québec à Montréal

1. Chauvin, Judite. Le treillis Cambrian.

Degree: 2010, Université du Québec à Montréal

URL: http://www.archipel.uqam.ca/3732/1/M11584.pdf

► Dans ce mémoire de maîtrise, nous allons nous intéresser au treillis Cambrian. Nous débuterons par des rappels de notions préliminaires sur les treillis, les groupes… (more)

Subjects/Keywords: Groupe de Coxeter; Treillis Cambrian

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APA (6^th Edition):

Chauvin, J. (2010). Le treillis Cambrian. (Thesis). Université du Québec à Montréal. Retrieved from http://www.archipel.uqam.ca/3732/1/M11584.pdf

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Chauvin, Judite. “Le treillis Cambrian.” 2010. Thesis, Université du Québec à Montréal. Accessed March 07, 2021. http://www.archipel.uqam.ca/3732/1/M11584.pdf.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Chauvin, Judite. “Le treillis Cambrian.” 2010. Web. 07 Mar 2021.

Vancouver:

Chauvin J. Le treillis Cambrian. [Internet] [Thesis]. Université du Québec à Montréal; 2010. [cited 2021 Mar 07]. Available from: http://www.archipel.uqam.ca/3732/1/M11584.pdf.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chauvin J. Le treillis Cambrian. [Thesis]. Université du Québec à Montréal; 2010. Available from: http://www.archipel.uqam.ca/3732/1/M11584.pdf

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Université du Québec à Montréal

2. Chauvin, Judite. Le treillis Cambrian.

Degree: 2010, Université du Québec à Montréal

URL: http://archipel.uqam.ca/3732/1/M11584.pdf

► Dans ce mémoire de maîtrise, nous allons nous intéresser au treillis Cambrian. Nous débuterons par des rappels de notions préliminaires sur les treillis, les groupes… (more)

Subjects/Keywords: Groupe de Coxeter; Treillis Cambrian

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Chauvin, J. (2010). Le treillis Cambrian. (Thesis). Université du Québec à Montréal. Retrieved from http://archipel.uqam.ca/3732/1/M11584.pdf

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Chauvin, Judite. “Le treillis Cambrian.” 2010. Thesis, Université du Québec à Montréal. Accessed March 07, 2021. http://archipel.uqam.ca/3732/1/M11584.pdf.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Chauvin, Judite. “Le treillis Cambrian.” 2010. Web. 07 Mar 2021.

Vancouver:

Chauvin J. Le treillis Cambrian. [Internet] [Thesis]. Université du Québec à Montréal; 2010. [cited 2021 Mar 07]. Available from: http://archipel.uqam.ca/3732/1/M11584.pdf.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chauvin J. Le treillis Cambrian. [Thesis]. Université du Québec à Montréal; 2010. Available from: http://archipel.uqam.ca/3732/1/M11584.pdf

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Victoria

3. Bohach, Lisa Lynn. Systematics and biostratigraphy of Lower Cambrian trilobites of western Laurentia.

Degree: School of Earth and Ocean Sciences, 2018, University of Victoria

URL: https://dspace.library.uvic.ca//handle/1828/9754

► Medial Lower Cambrian strata from continental shelf deposits of western Laurentia yield abundant, low diversity trilobite faunas. New faunas from the Cranbrook and Eager formations… (more)

▼ Medial Lower Cambrian strata from continental shelf deposits of western Laurentia yield abundant, low diversity trilobite faunas. New faunas from the Cranbrook and Eager formations (southeastern British Columbia) and the upper Campito, Poleta, Harkless and Saline Valley formations (southwestern Great Basin, California and Nevada) have yielded: 33 species of Olenellina (20 new); 2 new species of Edelsteinaspidae (Redlichiina); 13 species of Corynexochida (5 new); 4 species of Ptychopariina (1 new); 1 new species of Eodiscina; 1 species of Oryctocephalidae; 1 new species of Protypidae; and 1 possible species of Cheiruroideidae. One new genus, Wannerellus, is established and tentatively assigned to the Wanneriidae. Systematic studies emphasize the importance of early ontogenetic features and ventral morphology in determining supraspecific relationships. Major changes are made to the suprageneric classification of the Olenelloidea: the Wanneriidae is recognized as a family separate from the Olenellidae; the Laudoniinae and Gabriellinae are abandoned and their type genera assigned to the Wanneriidae; the Mesonacinae is characterized as a peramorphic subfamily of the Olenellidae; and the Bristoliinae is synonymized with the Biceratopsinae (Olenellidae). The Corynexochidae is also changed in membership to include the Dorypyginae (=Ogygopsidae). Heterochrony is a major pattern of evolutionary change in Lower Cambrian trilobites. Biostratigraphic division of the medial lower Cambrian comprises 10 new subzones of 4 zones and is the first species-based trilobite zonation for Laurentia. It replaces previous genus-based zonations that are imprecise and questionable in recognition. In ascending order, the zonation includes: the Nevadia weeksi and Nevadia palmeri subzones of the Nevadia Zone; the Nevadella parvoconica and Nevadella eiicharis subzones of the Nevadella Zone; the Elliptocephala stewarti, Gabriellus poletensis and Wannerellus alcatrazensis subzones of the Elliptocephala Zone; and the Wanneria logani, Wanneria dunnae and Proliostracus buelnaensis subzones of the Olenellus transitans Zone. These zones and subzones can be correlated with other successions in western and eastern Laurentia. Biofacies differentiation of restricted shelf deposits is poorly developed in the Nevadella though Elliptocephala Zones. For this interval, the Nevadella and Wanneriid biofacies are successive biofacies of restricted shelf deposits and the Labradoria and Ekwipagetia biofacies are successive biofacies of open shelf deposits. Biofacies differentiation is well developed in the Olenellus transitans Zone, with an Olenellus Biofacies in elastics; a Wanneriid Biofacies in silty and oolitic carbonates; a Bonnia Biofacies in pure carbonates; and an Ogygopsis Biofacies in open shelf deposits. Advisors/Committee Members: Ludvigsen, Rolf (supervisor).

Subjects/Keywords: Paleontology; British Columbia; Cambrian; Trilobites

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APA (6^th Edition):

Bohach, L. L. (2018). Systematics and biostratigraphy of Lower Cambrian trilobites of western Laurentia. (Thesis). University of Victoria. Retrieved from https://dspace.library.uvic.ca//handle/1828/9754

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Bohach, Lisa Lynn. “Systematics and biostratigraphy of Lower Cambrian trilobites of western Laurentia.” 2018. Thesis, University of Victoria. Accessed March 07, 2021. https://dspace.library.uvic.ca//handle/1828/9754.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Bohach, Lisa Lynn. “Systematics and biostratigraphy of Lower Cambrian trilobites of western Laurentia.” 2018. Web. 07 Mar 2021.

Vancouver:

Bohach LL. Systematics and biostratigraphy of Lower Cambrian trilobites of western Laurentia. [Internet] [Thesis]. University of Victoria; 2018. [cited 2021 Mar 07]. Available from: https://dspace.library.uvic.ca//handle/1828/9754.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Bohach LL. Systematics and biostratigraphy of Lower Cambrian trilobites of western Laurentia. [Thesis]. University of Victoria; 2018. Available from: https://dspace.library.uvic.ca//handle/1828/9754

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Utah State University

4. Lyon, Eva. The Interrelationship Between the Bio- and Sequence Stratigraphy of the Middle Cambrian Spence Shale of Northern Utah and Southern Idaho.

Degree: MS, Geology, 2011, Utah State University

URL: https://digitalcommons.usu.edu/etd/1117

► The Middle Cambrian Spence Shale Member of the Langston Formation of northern Utah and southern Idaho is a fossil-rich unit that exhibits distinct cyclicity… (more)

▼ The Middle Cambrian Spence Shale Member of the Langston Formation of northern Utah and southern Idaho is a fossil-rich unit that exhibits distinct cyclicity at the parasequence (meter) scale. At least seven discrete, shallowing-upwards parasequences, or cycles, can be found at the Miners Hollow and Antimony Canyon localities, each composed of calcareous shale capped by limestone. Within each cycle and within the member as a whole, predictable patterns of faunal distribution are evident. Sampling and identification of fossils from two localities have revealed that observed changes in fauna track changes in sea level throughout the section. Through cluster and principal components analyses it has been determined that those rocks of the Spence Shale representing a transgressive systems tract are home to a particular community of organisms, while those rocks of the highstand systems tract are home to another. It logically follows that the rocks of the transgressive tract represent a distinct biofacies, while those of the highstand tract represent another. The transgressive biofacies is composed of species such as agnostid and oryctocephalid trilobites and inarticulate brachiopods that are commonly found in deeper ramp settings. The highstand biofacies is distinguished by such taxa as Zacanthoides and other larger trilobite genera such as Glossopleura and Kootenia, and the eocrinoid Gogia, among others. The difference in ramp position between the Miners Hollow and Antimony Canyon localities implies a water depth gradient, with Antimony Canyon representing shallower water and Miners Hollow representing deeper water. This relationship is also reflected in the biofacies and community assignments. The stratigraphic trends explored in this study may be applied to other Spence Shale localities and possibly other Cambrian fossil deposits, such as the Burgess Shale of British Columbia. (151 pages) Advisors/Committee Members: W. David Liddell, Carol Dehler, Peter Kolesar, ;.

Subjects/Keywords: Cambrian; carbonate; lagerstatten; trilobite; Geology

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APA (6^th Edition):

Lyon, E. (2011). The Interrelationship Between the Bio- and Sequence Stratigraphy of the Middle Cambrian Spence Shale of Northern Utah and Southern Idaho. (Masters Thesis). Utah State University. Retrieved from https://digitalcommons.usu.edu/etd/1117

Chicago Manual of Style (16^th Edition):

Lyon, Eva. “The Interrelationship Between the Bio- and Sequence Stratigraphy of the Middle Cambrian Spence Shale of Northern Utah and Southern Idaho.” 2011. Masters Thesis, Utah State University. Accessed March 07, 2021. https://digitalcommons.usu.edu/etd/1117.

MLA Handbook (7^th Edition):

Lyon, Eva. “The Interrelationship Between the Bio- and Sequence Stratigraphy of the Middle Cambrian Spence Shale of Northern Utah and Southern Idaho.” 2011. Web. 07 Mar 2021.

Vancouver:

Lyon E. The Interrelationship Between the Bio- and Sequence Stratigraphy of the Middle Cambrian Spence Shale of Northern Utah and Southern Idaho. [Internet] [Masters thesis]. Utah State University; 2011. [cited 2021 Mar 07]. Available from: https://digitalcommons.usu.edu/etd/1117.

Council of Science Editors:

Lyon E. The Interrelationship Between the Bio- and Sequence Stratigraphy of the Middle Cambrian Spence Shale of Northern Utah and Southern Idaho. [Masters Thesis]. Utah State University; 2011. Available from: https://digitalcommons.usu.edu/etd/1117

5. Laing, Brittany A 1993-. Redefining the Treptichnus pedum zone at the Global Boundary Stratotype Section and Point (GSSP): A critical reassessment of the Ediacaran-Cambrian boundary.

Degree: 2018, University of Saskatchewan

URL: http://hdl.handle.net/10388/8647

► The Cambrian explosion bisects the history of life, separating relatively simple pre-Cambrian life from a complex and diverse Cambrian fauna. Due to the paucity of… (more)

▼ The Cambrian explosion bisects the history of life, separating relatively simple pre-Cambrian life from a complex and diverse Cambrian fauna. Due to the paucity of the body-fossil record, trace fossils often offer the only available insight into these evolutionary milestones, representing a continuous record through the late Ediacaran-early Cambrian. The Chapel Island Formation (CIF) of the Burin Peninsula, Newfoundland, provides an exceptional record of these innovations. Currently, the Global Boundary Stratotype Section and Point (GSSP) for the basal Cambrian boundary is located 2.4 m above the base of member 2 of the CIF, delineated by the lowest observed appearance of the Treptichnus pedum Ichnofossil Assemblage Zone (IAZ). Currently, researchers are facing difficulties when attempting to correlate with a few sections worldwide, and a formal revision of the boundary has been proposed. We hypothesize that a revision of the ichnotaxonomy of the GSSP with an emphasis on trace fossil functional morphology may better illustrate evolutionary innovations at the Ediacaran-Cambrian boundary. In turn, this revised ichnotaxonomy may provide further support for the position of the Ediacaran-Cambrian GSSP. Through a bed-by-bed study, the ichnotaxonomy of the T. pedum IAZ was revised, and a stratigraphic section was measured. Twenty ichnospecies comprising thirteen ichnogenera were observed (Figure 0.1). The ichnospecies were grouped into five ichnoguilds, which were used to conduct an ecospace analysis of the section. The ichnofauna reveled a more gradual appearance of ichnofossil diversity at the boundary, and a more protracted transition between Ediacaran and Cambrian ecosystems than previously envisioned. The T. pedum IAZ in the CIF marks the appearance of novel methods of interacting with the substrate as documented by sub-horizontal branching burrows (treptichnids), equilibrium structures (Bergaueria isp.), and complex vertical burrows (Gyrolithes scintillus). Additionally, it marks the evolution of novel body plans, as revealed by the presence of arthropod scratch marks (Dimorphichnus cf. obliquus). However, remnants of Ediacaran matground ecology are also present. Farming feeding styles are utilized by the Gyrolithes scintillus ichnoguild, and mat grazing remains a common feeding style. These ichnotaxa provide valuable insight into the very beginnings of vertical, penetrative burrowing. They further illuminate the depth and rate at which this new lifestyle evolved, and shed light on the evolution of three-dimensional burrowing. Advisors/Committee Members: Buatois, Luis A., Mángano, M. Gabriela, Narbonne, Guy M., Eglington, Bruce M., Aitken, Alec, Merriam, Jim.

Subjects/Keywords: Trace fossils; Evolutionary paleoecology; Cambrian Explosion

12 more images…

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APA (6^th Edition):

Laing, B. A. 1. (2018). Redefining the Treptichnus pedum zone at the Global Boundary Stratotype Section and Point (GSSP): A critical reassessment of the Ediacaran-Cambrian boundary. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/8647

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Laing, Brittany A 1993-. “Redefining the Treptichnus pedum zone at the Global Boundary Stratotype Section and Point (GSSP): A critical reassessment of the Ediacaran-Cambrian boundary.” 2018. Thesis, University of Saskatchewan. Accessed March 07, 2021. http://hdl.handle.net/10388/8647.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Laing, Brittany A 1993-. “Redefining the Treptichnus pedum zone at the Global Boundary Stratotype Section and Point (GSSP): A critical reassessment of the Ediacaran-Cambrian boundary.” 2018. Web. 07 Mar 2021.

Vancouver:

Laing BA1. Redefining the Treptichnus pedum zone at the Global Boundary Stratotype Section and Point (GSSP): A critical reassessment of the Ediacaran-Cambrian boundary. [Internet] [Thesis]. University of Saskatchewan; 2018. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10388/8647.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Laing BA1. Redefining the Treptichnus pedum zone at the Global Boundary Stratotype Section and Point (GSSP): A critical reassessment of the Ediacaran-Cambrian boundary. [Thesis]. University of Saskatchewan; 2018. Available from: http://hdl.handle.net/10388/8647

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Saskatchewan

6. Graham, Terri. Ichnology, Sedimentology and Paleoenvironmental Reconstruction of the Lower Cambrian Addy Quartzite, northeastern Washington State, U.S.A.

Degree: 2011, University of Saskatchewan

URL: http://hdl.handle.net/10388/ETD-2011-05-87

► The Addy Quartzite is a tide-dominated shallow-marine unit of heterolithic nature found in northeast Washington State. The Addy is Early Cambrian in age and reflects… (more)

Subjects/Keywords: Addy; Quartzite; Cambrian; Ichnology; Sedimentology; Washington

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APA (6^th Edition):

Graham, T. (2011). Ichnology, Sedimentology and Paleoenvironmental Reconstruction of the Lower Cambrian Addy Quartzite, northeastern Washington State, U.S.A. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/ETD-2011-05-87

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Graham, Terri. “Ichnology, Sedimentology and Paleoenvironmental Reconstruction of the Lower Cambrian Addy Quartzite, northeastern Washington State, U.S.A.” 2011. Thesis, University of Saskatchewan. Accessed March 07, 2021. http://hdl.handle.net/10388/ETD-2011-05-87.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Graham, Terri. “Ichnology, Sedimentology and Paleoenvironmental Reconstruction of the Lower Cambrian Addy Quartzite, northeastern Washington State, U.S.A.” 2011. Web. 07 Mar 2021.

Vancouver:

Graham T. Ichnology, Sedimentology and Paleoenvironmental Reconstruction of the Lower Cambrian Addy Quartzite, northeastern Washington State, U.S.A. [Internet] [Thesis]. University of Saskatchewan; 2011. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10388/ETD-2011-05-87.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Graham T. Ichnology, Sedimentology and Paleoenvironmental Reconstruction of the Lower Cambrian Addy Quartzite, northeastern Washington State, U.S.A. [Thesis]. University of Saskatchewan; 2011. Available from: http://hdl.handle.net/10388/ETD-2011-05-87

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

7. Sarnoski, Anthony Henry. The Stratigraphy And Depositional History Of The Deadwood Formation, With A Focus On Early Paleozoic Subsidence In The Williston Basin.

Degree: MS, Geology, 2015, University of North Dakota

URL: https://commons.und.edu/theses/1957

► The Deadwood Formation is an assemblage of siliciclastic, carbonate, and evaporite sedimentary rocks in North Dakota, South Dakota, Montana, Wyoming, Manitoba, and Saskatchewan. The… (more)

▼ The Deadwood Formation is an assemblage of siliciclastic, carbonate, and evaporite sedimentary rocks in North Dakota, South Dakota, Montana, Wyoming, Manitoba, and Saskatchewan. The majority of the lateral extent of the Deadwood Formation is in the subsurface of the Williston Basin, where it is the basal lithostratigraphic unit. Deposition began roughly 501 million years ago, as the Sauk sequence reached the exposed Precambrian igneous and metamorphic rock of the North American Craton. Six identifiable and widespread gamma ray markers occur in the well logs, dividing the formation into six informal units, label members A through F in ascending order. The initial deposits on the craton were conglomerates and sandstones of the Cambrian Member A. These sediments were overlain by glauconite rich, siltstones and fine-grained sandstones of the Cambrian and Ordovician Member B. After the deposition of Member B, three regressive-transgressive sequences took place, depositing a succession of sandstones, limestones, dolomudstones, siliciclastic mudstones, and calcareous siltstones. These deposits represent the Ordovician members, C, D, E and F. Using the thickness, depositional environments, age of each member, and other well information, tectonic subsidence values were determined using backstripping analysis. This analysis was completed by inputting all of the information into NovvaÂ®, a 1D geological modeling software released by Sirius Exploration Geochemistry Inc. Data collected from well logs and core, other data researched by the author, and information from previous works was combined with information and calculations supplied by NovvaÂ®. The results produce an accurate computation of the depositional history for the seven wells that penetrated all six members of the Deadwood Formation and the Precambrian basement. Prior to and at the start of Deadwood deposition the Williston Basin did not exist. Evidence from isopach maps created for each member of the Deadwood Formation and the results from NovvaÂ® concluded that subsidence in the area, now known as the Williston Basin, did not begin until Member C was being deposited. This places the initiation of the Williston Basin to be roughly 485 to 482 million years ago. Advisors/Committee Members: Richard D. LeFever.

Subjects/Keywords: Cambrian; Deadwood; Newporte; Ordovician; Subsidence; Williston Basin

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sarnoski, A. H. (2015). The Stratigraphy And Depositional History Of The Deadwood Formation, With A Focus On Early Paleozoic Subsidence In The Williston Basin. (Masters Thesis). University of North Dakota. Retrieved from https://commons.und.edu/theses/1957

Chicago Manual of Style (16^th Edition):

Sarnoski, Anthony Henry. “The Stratigraphy And Depositional History Of The Deadwood Formation, With A Focus On Early Paleozoic Subsidence In The Williston Basin.” 2015. Masters Thesis, University of North Dakota. Accessed March 07, 2021. https://commons.und.edu/theses/1957.

MLA Handbook (7^th Edition):

Sarnoski, Anthony Henry. “The Stratigraphy And Depositional History Of The Deadwood Formation, With A Focus On Early Paleozoic Subsidence In The Williston Basin.” 2015. Web. 07 Mar 2021.

Vancouver:

Sarnoski AH. The Stratigraphy And Depositional History Of The Deadwood Formation, With A Focus On Early Paleozoic Subsidence In The Williston Basin. [Internet] [Masters thesis]. University of North Dakota; 2015. [cited 2021 Mar 07]. Available from: https://commons.und.edu/theses/1957.

Council of Science Editors:

Sarnoski AH. The Stratigraphy And Depositional History Of The Deadwood Formation, With A Focus On Early Paleozoic Subsidence In The Williston Basin. [Masters Thesis]. University of North Dakota; 2015. Available from: https://commons.und.edu/theses/1957

Virginia Tech

8. Nakagaki, Michael Masao. Ecology and Morphology of Early Animals: An Analysis of the Problematic Genus Sphenothallus from the Lower Cambrian Shuijingtuo and Niutitang Formations in South China.

Degree: MS, Geosciences, 2009, Virginia Tech

URL: http://hdl.handle.net/10919/34894

► New specimens of the problematic group Sphenothallus have been recovered from the early Cambrian Shuijingtuo and Niutitang Formations in South China. The two sites from… (more)

Subjects/Keywords: Cambrian; Sphenothallus; Morphology

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APA (6^th Edition):

Nakagaki, M. M. (2009). Ecology and Morphology of Early Animals: An Analysis of the Problematic Genus Sphenothallus from the Lower Cambrian Shuijingtuo and Niutitang Formations in South China. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/34894

Chicago Manual of Style (16^th Edition):

Nakagaki, Michael Masao. “Ecology and Morphology of Early Animals: An Analysis of the Problematic Genus Sphenothallus from the Lower Cambrian Shuijingtuo and Niutitang Formations in South China.” 2009. Masters Thesis, Virginia Tech. Accessed March 07, 2021. http://hdl.handle.net/10919/34894.

MLA Handbook (7^th Edition):

Nakagaki, Michael Masao. “Ecology and Morphology of Early Animals: An Analysis of the Problematic Genus Sphenothallus from the Lower Cambrian Shuijingtuo and Niutitang Formations in South China.” 2009. Web. 07 Mar 2021.

Vancouver:

Nakagaki MM. Ecology and Morphology of Early Animals: An Analysis of the Problematic Genus Sphenothallus from the Lower Cambrian Shuijingtuo and Niutitang Formations in South China. [Internet] [Masters thesis]. Virginia Tech; 2009. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10919/34894.

Council of Science Editors:

Nakagaki MM. Ecology and Morphology of Early Animals: An Analysis of the Problematic Genus Sphenothallus from the Lower Cambrian Shuijingtuo and Niutitang Formations in South China. [Masters Thesis]. Virginia Tech; 2009. Available from: http://hdl.handle.net/10919/34894

University of British Columbia

9. Best, Raymond Victor. A Lower Cambrian trilobite fauna from near Cranbrook, B.C.

Degree: Master of Applied Science - MASc, Geography, 1952, University of British Columbia

URL: http://hdl.handle.net/2429/41178

► Trilobites typical of the well known Olenellus zone of the Lower Cambrian constitute a large collection from the Eager Formation, near Cranbrook, B.C. Their classification… (more)

Subjects/Keywords: Trilobites; Paleontology – Cambrian

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APA (6^th Edition):

Best, R. V. (1952). A Lower Cambrian trilobite fauna from near Cranbrook, B.C. (Masters Thesis). University of British Columbia. Retrieved from http://hdl.handle.net/2429/41178

Chicago Manual of Style (16^th Edition):

Best, Raymond Victor. “A Lower Cambrian trilobite fauna from near Cranbrook, B.C.” 1952. Masters Thesis, University of British Columbia. Accessed March 07, 2021. http://hdl.handle.net/2429/41178.

MLA Handbook (7^th Edition):

Best, Raymond Victor. “A Lower Cambrian trilobite fauna from near Cranbrook, B.C.” 1952. Web. 07 Mar 2021.

Vancouver:

Best RV. A Lower Cambrian trilobite fauna from near Cranbrook, B.C. [Internet] [Masters thesis]. University of British Columbia; 1952. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2429/41178.

Council of Science Editors:

Best RV. A Lower Cambrian trilobite fauna from near Cranbrook, B.C. [Masters Thesis]. University of British Columbia; 1952. Available from: http://hdl.handle.net/2429/41178

University of Texas – Austin

10. Grant, Richard E., 1927-1994. Cambrian faunas of the Snowy Range formation, Southwestern Montana and Northwestern Wyoming.

Degree: PhD, Geological Sciences, 1958, University of Texas – Austin

URL: http://dx.doi.org/10.26153/tsw/10064

► Fossils and rock samples were collected from the Snowy Range formation (Cambrian) at 24 sections measured in the Horseshoe Hills and Bridger Mountains of Montana… (more)

▼ Fossils and rock samples were collected from the Snowy Range formation (Cambrian) at 24 sections measured in the Horseshoe Hills and Bridger Mountains of Montana and 8 sections in the vicinity of Yellowstone National Park in Montana and Wyoming. Where the Snowy Range formation is overlain by the Maywood unit (Devonian), both were measured and sampled, although the Maywood proved to be unfossiliferous. Lowermost of the 3 members of the Snowy Range formation is the Dry Creek shale which lies conformably on the Pilgrim limestone. It consists of about 50 feet of purplish, thin bedded, fissile to slightly plastic shale with a few irregular beds of brownish gray, platy, dolomitic siltstone in the lower three-fourths, and some thin beds of silty limestone or limestone-pebble conglomerate in the upper quarter. No evidence is present in this area for subaerial erosion between the Pilgrim and Snowy Range formations, although beds of siltstone in the Dry Creek may reflect uplift and erosion at the source of terrigenous sediments. The middle member is the Sage, which averages about 200 feet thick where complete. Its base is marked at most localities by a one to 20 foot bioherm of columnar algal limestone; the remainder is a fairly regular alternation of one to two foot beds of limestone or limestone pebble conglomerate with 2 to 4 foot beds of green shale or very argil laceous greenish gray limestone. The upper part contains beds of non columnar algal limestone. This member was deposited far from shore in shallow turbid water that contained abundant calcium in solution. Microcrystalline calcite ooze, along with fine fragments of fossils arri fecal pellets, collected in ripple troughs and other depressions in the mud of the sea floor. These small accumulations became sufficiently consolidated to maintain coherence when excavated by currents that swept away clay particles and concentrated these consolidated limestone "pods" into beds that later were cemented to form limestone-pebble conglomerate. The uppermost member, the Grove Creek, is nowhere complete in this area; the upper part was removed by erosion at some localities and by faulting at others. The member consists of about 25 feet of dolomitized limestone-pebble or cobble conglomerate with intercalated beds of dolomitized gray splintery shale. This member owes much of its distinctive character to weathering that took place before deposition of the Upper Ordovician Bighorn formation. The Maywood unit is a Devonian soil or weathered zone that overlies some part of the Snowy Range formation in the northwestern part of the area of study, but overlies formations as low as those in the Precambrian Belt Series or as high as the Upper Ordovician Bighorn formation in other parts of Montana. It consists of a greatly varying thickness (averaging about 55 feet) of reddish orange or brown, thin bedded, silty dolomite or dolomitic limestone. At a few localities it is coarse grained, thick bedded, light brown dolomite. No fossils were found in the Maywood in the area studied, but Devonian… Advisors/Committee Members: Bell, W. Charles, 1911-1979 (advisor).

Subjects/Keywords: Paleontology – Montana – Cambrian; Paleontology – Wyoming – Cambrian

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APA (6^th Edition):

Grant, Richard E., 1. (1958). Cambrian faunas of the Snowy Range formation, Southwestern Montana and Northwestern Wyoming. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://dx.doi.org/10.26153/tsw/10064

Chicago Manual of Style (16^th Edition):

Grant, Richard E., 1927-1994. “Cambrian faunas of the Snowy Range formation, Southwestern Montana and Northwestern Wyoming.” 1958. Doctoral Dissertation, University of Texas – Austin. Accessed March 07, 2021. http://dx.doi.org/10.26153/tsw/10064.

MLA Handbook (7^th Edition):

Grant, Richard E., 1927-1994. “Cambrian faunas of the Snowy Range formation, Southwestern Montana and Northwestern Wyoming.” 1958. Web. 07 Mar 2021.

Vancouver:

Grant, Richard E. 1. Cambrian faunas of the Snowy Range formation, Southwestern Montana and Northwestern Wyoming. [Internet] [Doctoral dissertation]. University of Texas – Austin; 1958. [cited 2021 Mar 07]. Available from: http://dx.doi.org/10.26153/tsw/10064.

Council of Science Editors:

Grant, Richard E. 1. Cambrian faunas of the Snowy Range formation, Southwestern Montana and Northwestern Wyoming. [Doctoral Dissertation]. University of Texas – Austin; 1958. Available from: http://dx.doi.org/10.26153/tsw/10064

University of California – Riverside

11. Sappenfield, Aaron Dale. Precambrian-Cambrian Sedimentology, Stratigraphy, and Paleontology in the Great Basin (Western United States).

Degree: Geological Sciences, 2015, University of California – Riverside

URL: http://www.escholarship.org/uc/item/4r02d6xr

► Thick accumulations of Neoproterozoic and early Phanerozoic strata are distributed throughout much of the arid continental interior of western North America, providing an expansive and… (more)

▼ Thick accumulations of Neoproterozoic and early Phanerozoic strata are distributed throughout much of the arid continental interior of western North America, providing an expansive and well-exposed archive of this important time in Earth’s history. The information presented herein supplements evaluations regarding the utility and limitations of this archive by providing an integrated sedimentological, paleontological, and geochronological description for Precambrian-Cambrian strata exposed in the area and by reporting the discovery of new trace and body fossils housed there. The first chapter of this dissertation describes the sedimentology and stratigraphy of Precambrian-Cambrian conglomeratic and sandstone-dominated units exposed in the central Great Basin. Seven localities distributed along a 600 km north-south transect are described using existing data supplemented by information compiled from more than 5 kilometers of newly measured stratigraphic section. These data collectively facilitate development of a unified framework regarding the nature and timing of deposition in the area while also providing a series of stratigraphic tie points applicable to both regional and global correlation schemes. The second chapter reports the discovery of Zoophycos burrows from early Cambrian sediments exposed in eastern California. The Zoophycos ichnogenus is a well-known and considerably-studied deposit feeding trace fossil that, like other deposit feeding burrows, had not previously been reported in pre-Ordovician strata, making these the oldest examples of this celebrated burrow. Most importantly, Zoophycos burrows reported herein provide the earliest definitive evidence of deposit feeding to date, pushing back the advent of this feeding strategy to near the Precambrian-Cambrian boundary. This dissertation’s final chapter reports medusozoan macrofossils from the early Cambrian Zabriskie Quartzite as the earliest fossil evidence of cnidarian medusae and the oldest example of a metazoan mass stranding event currently on record. Given that these are fossils of nonmineralized forms, the Zabriskie fossils also advance reconstruction of the taphonomic dynamics responsible for the preservation of soft-bodied macrofauna in nearshore facies through the Precambrian-Cambrian transition. The features of this comparison imply that a preservational bias may have been introduced near the onset of the Phanerozoic, shifting the predominant environment for soft-bodied preservation in sandstone facies from subtidal environments to the supralittoral zone.

Subjects/Keywords: Sedimentary geology; Paleontology; Paleoecology; Cambrian; Ediacaran; Great Basin; Precambrian; Sedimentology; Stratigraphy

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APA (6^th Edition):

Sappenfield, A. D. (2015). Precambrian-Cambrian Sedimentology, Stratigraphy, and Paleontology in the Great Basin (Western United States). (Thesis). University of California – Riverside. Retrieved from http://www.escholarship.org/uc/item/4r02d6xr

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sappenfield, Aaron Dale. “Precambrian-Cambrian Sedimentology, Stratigraphy, and Paleontology in the Great Basin (Western United States).” 2015. Thesis, University of California – Riverside. Accessed March 07, 2021. http://www.escholarship.org/uc/item/4r02d6xr.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sappenfield, Aaron Dale. “Precambrian-Cambrian Sedimentology, Stratigraphy, and Paleontology in the Great Basin (Western United States).” 2015. Web. 07 Mar 2021.

Vancouver:

Sappenfield AD. Precambrian-Cambrian Sedimentology, Stratigraphy, and Paleontology in the Great Basin (Western United States). [Internet] [Thesis]. University of California – Riverside; 2015. [cited 2021 Mar 07]. Available from: http://www.escholarship.org/uc/item/4r02d6xr.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sappenfield AD. Precambrian-Cambrian Sedimentology, Stratigraphy, and Paleontology in the Great Basin (Western United States). [Thesis]. University of California – Riverside; 2015. Available from: http://www.escholarship.org/uc/item/4r02d6xr

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of California – Riverside

12. Gilbert, Ian Ross. Cambrian Microfossils of the Tethyan Himalaya.

Degree: Geological Sciences, 2014, University of California – Riverside

URL: http://www.escholarship.org/uc/item/371829xw

► The Parahio Valley hosts the type section of the Parahio Formation, a unit that occurs widely in the Tethyan Himalaya. Recent revision and recollection of… (more)

Subjects/Keywords: Paleontology; Cambrian; Chancelloriid; Hyolithid; Microfossils; Small Shelly Fossils

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APA (6^th Edition):

Gilbert, I. R. (2014). Cambrian Microfossils of the Tethyan Himalaya. (Thesis). University of California – Riverside. Retrieved from http://www.escholarship.org/uc/item/371829xw

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gilbert, Ian Ross. “Cambrian Microfossils of the Tethyan Himalaya.” 2014. Thesis, University of California – Riverside. Accessed March 07, 2021. http://www.escholarship.org/uc/item/371829xw.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gilbert, Ian Ross. “Cambrian Microfossils of the Tethyan Himalaya.” 2014. Web. 07 Mar 2021.

Vancouver:

Gilbert IR. Cambrian Microfossils of the Tethyan Himalaya. [Internet] [Thesis]. University of California – Riverside; 2014. [cited 2021 Mar 07]. Available from: http://www.escholarship.org/uc/item/371829xw.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gilbert IR. Cambrian Microfossils of the Tethyan Himalaya. [Thesis]. University of California – Riverside; 2014. Available from: http://www.escholarship.org/uc/item/371829xw

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of California – Riverside

13. Collette, Joseph Henry. A Bridge Too Many? Phylogeny and Biogeography of the Upper Cambrian Saukiid Trilobites.

Degree: Geological Sciences, 2014, University of California – Riverside

URL: http://www.escholarship.org/uc/item/3pz0555k

► The family Saukiidae Ulrich and Resser, 1933 was one of the largest groups of late Cambrian trilobites, with representatives occurring on all major paleogeographic plates.… (more)

▼ The family Saukiidae Ulrich and Resser, 1933 was one of the largest groups of late Cambrian trilobites, with representatives occurring on all major paleogeographic plates. However, inconsistent systematic practices that have been historically applied to this group have resulted in a muddled concept of the Saukiidae and an exaggerated species count. This has led to erouneous placement of many taxa due to a lack of distinct characters with which to diagnose some saukiid genera and species. To mitigate past systematic digressions and to re-elevate Saukiidae to a useful concept, a series of cladistic analyses were performed that incorporated all global occurrences of the Saukiidae for which there is a good fossil record. As a further test of the familial relationships of the Saukiidae, members of the Ptychaspididae and Pterocephaliidae were included to test what effect, if any, different outgroups would have on character polarity and the branching point with the Saukiidae. Results vary with outgroup choice, but suggest that some of the characters uniting Ptychaspididae and Saukiidae may be convergent. Because the 'upside-down' stratigraphic placement of taxa recovered with this outgroup is inconsistent with stratigraphic evidence, the Pterocephaliidae outgroup is preferred. The preferred phylogeny indicates that the Saukiidae is monophyletic, and is composed of two distinct groups of subfamilial rank: the Saukiinae, n. subfam., defined by the absence of a preglabellar field (Calvinella, Danzhaisaukia, Eosaukia, Linguisaukia, Lophosaukia, Mictosaukia, Saukia, Sinosaukia, and Tellerina); and the Prosaukiinae n. subfam., defined by possession of a preglabellar field (Anderssonella, Hoytaspis, Lichengia, Pacootasaukia, Prosaukia, and Saukiella). The ancestral geographic area(s) for each node on the preferred cladogram was then computed using Fitch optomization. The Fitch analysis revealed that toward the base of the tree, descendants that had originated from ancestors living in Laurentia likely moved westward towards Australia and North China, most likely as larvae. Further up the tree, a single dispersal event appears to have moved eastward toward South China; all taxa in a more derived position to this dispersal occur in Gondwana indicating a radiation across Gondwana from this event, and a likely Laurentian origin of the family Saukiidae.

Subjects/Keywords: Paleontology; Evolution & development; cladistics; dispersal; late Cambrian; ocean currents; Saukiidae; trilobites

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APA (6^th Edition):

Collette, J. H. (2014). A Bridge Too Many? Phylogeny and Biogeography of the Upper Cambrian Saukiid Trilobites. (Thesis). University of California – Riverside. Retrieved from http://www.escholarship.org/uc/item/3pz0555k

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Collette, Joseph Henry. “A Bridge Too Many? Phylogeny and Biogeography of the Upper Cambrian Saukiid Trilobites.” 2014. Thesis, University of California – Riverside. Accessed March 07, 2021. http://www.escholarship.org/uc/item/3pz0555k.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Collette, Joseph Henry. “A Bridge Too Many? Phylogeny and Biogeography of the Upper Cambrian Saukiid Trilobites.” 2014. Web. 07 Mar 2021.

Vancouver:

Collette JH. A Bridge Too Many? Phylogeny and Biogeography of the Upper Cambrian Saukiid Trilobites. [Internet] [Thesis]. University of California – Riverside; 2014. [cited 2021 Mar 07]. Available from: http://www.escholarship.org/uc/item/3pz0555k.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Collette JH. A Bridge Too Many? Phylogeny and Biogeography of the Upper Cambrian Saukiid Trilobites. [Thesis]. University of California – Riverside; 2014. Available from: http://www.escholarship.org/uc/item/3pz0555k

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Utah

14. Garcia, Patricia K. Paleoecology of Upper Cambrian carbonate units, house range and South Lakeside Mountains, Utah.

Degree: MS, Geology & Geophysics, 2015, University of Utah

URL: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/4026/rec/1789

► Upper Cambrian strata in the Great Basin of western Utah are dominated by marine carbonate facies. The Hellnmaria Member of the Notch Peak Formation in… (more)

▼ Upper Cambrian strata in the Great Basin of western Utah are dominated by marine carbonate facies. The Hellnmaria Member of the Notch Peak Formation in the southern House Range and the Upper Carbonate Member of the St. Charles Formation in the northern South Lakeside Mountains are correlative Upper Cambrian strata. At both localities, the correlative carbonate units preserve cyanobacterical stromatolite facies containing burrows. The Hellnmaria Member and the Upper Carbonate Member both contain smooth walled cylindrical burrows inside and surrounding the stromatolites. The burrows exhibit a branching morphology, and they have a coarser grain fill that is different in texture from surrounding sediments. The branching geometry of the burrow tunnels is irregular and constricted. These are assigned to the trace fossil Thalassinoides paradoxicus. Thalassinoides paradoxicus is a deep infaunal deposit feeding trace fossil (fodinichnion) constructed by burrowing organisms of unknown identity. The probable burrowers mined shallow marine muds for food as well as seeking protection in the complex web of burrows. The Thalassinoides of this study are far too old to have been created by decapod crustaceans, which are the primary creators of such trace fossils in the Mesozoic and Cenozoic, so the identity of the Cambrian trace makers remains unknown. Many of the Thalassinoides burrows have been replaced with chert, which appears to be early diagenetic in origin when the burrows were still porous enough for the silica to find favorable nucleation sites on the burrow surface. Many of the burrows are over-silicified due to growth of the microcrystalline chert nodules extending beyond the boundaries of the original trace fossil. The Hellnmaria and Upper Carbonate members represent a shallow, tropical, quiet water paleoenvironment on an open marine platform. This interpretation is due to the presence of stromatolites and Thalassinoides burrows, both of which flourished in this paleoenvironment. This study demonstrates the importance of trace fossils in the interpretation of paleoecology, paleoclimate, and paleoenvironment of the ancient carbonate strata during the Late Cambrian in the Great Basin. This is particularly useful, because much of the strata of this age in this region lack a substantial body fossil record.

Subjects/Keywords: House Range; Ichnology; South Lakeside Mountains; stromatolites; Thalassinoides; Upper Cambrian

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APA (6^th Edition):

Garcia, P. K. (2015). Paleoecology of Upper Cambrian carbonate units, house range and South Lakeside Mountains, Utah. (Masters Thesis). University of Utah. Retrieved from http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/4026/rec/1789

Chicago Manual of Style (16^th Edition):

Garcia, Patricia K. “Paleoecology of Upper Cambrian carbonate units, house range and South Lakeside Mountains, Utah.” 2015. Masters Thesis, University of Utah. Accessed March 07, 2021. http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/4026/rec/1789.

MLA Handbook (7^th Edition):

Garcia, Patricia K. “Paleoecology of Upper Cambrian carbonate units, house range and South Lakeside Mountains, Utah.” 2015. Web. 07 Mar 2021.

Vancouver:

Garcia PK. Paleoecology of Upper Cambrian carbonate units, house range and South Lakeside Mountains, Utah. [Internet] [Masters thesis]. University of Utah; 2015. [cited 2021 Mar 07]. Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/4026/rec/1789.

Council of Science Editors:

Garcia PK. Paleoecology of Upper Cambrian carbonate units, house range and South Lakeside Mountains, Utah. [Masters Thesis]. University of Utah; 2015. Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/4026/rec/1789

University of Saskatchewan

15. Robson, Sean Paul. Early Upper Cambrian (Marjuman) linguliformean brachiopods from the Deadwood Formation.

Degree: 2005, University of Saskatchewan

URL: http://hdl.handle.net/10388/etd-04272005-095349

► The Deadwood Formation is an Upper Cambrian to Lower Ordovician succession of sandstones, shales, siltstones and limestones that blanketed central western North America during the… (more)

▼ The Deadwood Formation is an Upper Cambrian to Lower Ordovician succession of sandstones, shales, siltstones and limestones that blanketed central western North America during the initial Phanerozoic transgression. This transgression led to a broad, shallow epeiric sea which onlapped the Transcontinental Arch to the east and was protected on its western—seaward—side by a system of carbonate platforms now exposed in the Rocky Mountains. The Deadwood Formation is mostly a subsurface unit, but several exposures exist in the northern Great Plains due to uplift by Eocene igneous intrusions. Linguliformean brachiopods were recovered from two areas: the Black Hills of South Dakota, and two subsurface cores from Alberta and Saskatchewan. Forty-five species of linguliformean brachiopods assigned to twenty-eight genera were recovered from these localities and described. Giving provisional names, one new family, Holmerellidae, one new subfamily, Neotretinae, five new genera, Amplitreta, Dianabella, Ganotoglossa, Holmerellus, and Vangaporosa, are erected and seventeen new species are described: Amplitreta cyclopis, Amplitreta elongata, aff. Anabolatreta tora, Canthylotreta parislata, Curticia pustulosa, Dianabella artemesia, Ganotoglossa leptotropis, Holmerellus convexus, Holmerellus, acuminatus, Holmerellus limbatus, Kotylotreta nupera, Linnarssonella tubicula, Opisthotreta nuda, Rhondellina albertensis, Tropidoglossa costata, Quadrisonia? sigmoidea, and Vangaporosa dakotaensis. The family Holmerellidae is distinguished by pitted larval shells and smooth postlarval shells, a feature that is unique in the Linguloidea. The composition of the new subfamily Neotretinae recognizes the evolutionary relationship of the genera Neotreta and Rhondellina, which are more closely related to each other than to any other acrotretid genera. Based on a comparison of the brachiopod assemblages with similar faunas from Australia and elsewhere in Laurentia, the sections studied are determined to be late Marjuman (early Late Cambrian) to early Sunwaptan (middle Late Cambrian) in age. The subsurface faunas provide the first biostratigraphic dates for any part of the Deadwood Formation in Canada. Faunas from South Dakota come from strata near the base of the formation and below the first trilobite occurrences, this giving a more refined age for the transgression in South Dakota. A large number of shells with perforations assumed to have been caused by predators were recovered from two localities in South Dakota, and represent the first evidence of predation of fossil lingulids. Two types of perforations were identified: round holes with sharp, non-beveled edges, and irregularly shaped holes with chipped edges. The former hole type is attributed to either steady pressure applied over time (e.g. boring) or to a swift, piercing percussive strike. The latter hole type is attributed to a smashing percussive strike with a blunt appendage. Based on criteria established by the proposed attack-mode models, various hypothetical animals… Advisors/Committee Members: Pratt, Brian R., Renaut, Robin W., Patterson, William P., Lehmkuhl, Dennis M., Holmer, Lars E., Ansdell, Kevin M..

Subjects/Keywords: Upper Cambrian; Linguliformea; Brachiopoda

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APA (6^th Edition):

Robson, S. P. (2005). Early Upper Cambrian (Marjuman) linguliformean brachiopods from the Deadwood Formation. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/etd-04272005-095349

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Robson, Sean Paul. “Early Upper Cambrian (Marjuman) linguliformean brachiopods from the Deadwood Formation.” 2005. Thesis, University of Saskatchewan. Accessed March 07, 2021. http://hdl.handle.net/10388/etd-04272005-095349.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Robson, Sean Paul. “Early Upper Cambrian (Marjuman) linguliformean brachiopods from the Deadwood Formation.” 2005. Web. 07 Mar 2021.

Vancouver:

Robson SP. Early Upper Cambrian (Marjuman) linguliformean brachiopods from the Deadwood Formation. [Internet] [Thesis]. University of Saskatchewan; 2005. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10388/etd-04272005-095349.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Robson SP. Early Upper Cambrian (Marjuman) linguliformean brachiopods from the Deadwood Formation. [Thesis]. University of Saskatchewan; 2005. Available from: http://hdl.handle.net/10388/etd-04272005-095349

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

16. Shahkarami, Setareh 1984-. ICHNOLOGY OF THE EDIACARAN–CAMBRIAN TRANSITION: THE SOLTANIEH FORMATION OF NORTHERN IRAN AND ITS SIGNIFICANCE FOR UNDERSTANDING THE CAMBRIAN EXPLOSION.

Degree: 2016, University of Saskatchewan

URL: http://hdl.handle.net/10388/7698

► The Ediacaran–Cambrian transition is one of the most critical events in Earth history, a time of marked biological and sedimentary changes. The nature of the… (more)

▼ The Ediacaran–Cambrian transition is one of the most critical events in Earth history, a time of marked biological and sedimentary changes. The nature of the Cambrian explosion has been a major topic of discussion and numerous explanations have been posited for these dramatic changes. Strata in the Central Alborz Mountains, northern Iran are believed to show continuous sedimentation from Ediacaran through Cambrian times. The Soltanieh Formation consists of five members: Lower Dolomite, Lower Shale, Middle Dolomite, Upper Shale and Upper Dolomite members. This formation contains abundant trace fossils and displays a significant vertical facies recurrence, allowing comparison of identical environments through time. Four ichnozones have been recognized. Ichnozone I, containing Helminthopsis tenuis and Cochlichnus anguineus, is lower Fortunian based on small shelly fossils, and is interpreted as a distal expression of the Treptichnus pedum zone. Ichnozone II, comprising the first occurrence of T. pedum, is middle Fortunian, and is best regarded as the upper half of the Treptichnus pedum zone. Ichnozone III is late Fortunian–Cambrian Age 2, characterized by a sudden change in abundance and complexity of trace fossils. Cruziana problematica, Curvolithus isp., Helminthopsis tenuis, Palaeophycus tubularis, Phycodes isp., and Treptichnus pedum are common in this zone. Ichnozone IV is of Cambrian Age 2–Age 3, marked by the first appearances of Psammichnites gigas, Rusophycus avalonensis and Didymaulichnus miettensis. Integration of trace fossils with small shelly fossils suggests that the Ediacaran–Cambrian boundary should be placed at the base of Soltanieh Formation or within the Lower Dolomite Member. An integrated study of sedimentary facies, small shelly fossil zones, sequence stratigraphy, and distribution of associated trace fossils indicates that the delayed appearance of T. pedum and the low ichnodiversity in the Lower Shale reflect a complex interplay of evolutionary and ecological controls. The distribution and preservation of diagnostic early Cambrian trace fossils in the Lower Shale Member of the Soltanieh Formation is very likely to have been controlled by facies, whereas trace-fossil distribution in the Upper Shale Member is primarily controlled by evolutionary innovations. Our systematic review shows that significant diachronism was involved in the generation of the Great Unconformity suggesting that the sea-level fall that resulted in the formation of a sequnce boundary during the Ediacaran¬¬–Cambrian boundary dominantly reflects overprint of local tectonics on pure eustasy. Our results indicate that the sequnce boundary should not be used for inter-basin correlations. Advisors/Committee Members: Mángano, Gabriela, Buatois, Luis, Aitken, Alec, Cota-Sanchez, Hugo, Renaut , Robin, Morozov, Igor.

Subjects/Keywords: Cambrian Explosion; Ichnostratigraphy; evolutionary paleoecology; facies controls; macroevolution; sequence stratigraphy

2 more images…

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APA (6^th Edition):

Shahkarami, S. 1. (2016). ICHNOLOGY OF THE EDIACARAN–CAMBRIAN TRANSITION: THE SOLTANIEH FORMATION OF NORTHERN IRAN AND ITS SIGNIFICANCE FOR UNDERSTANDING THE CAMBRIAN EXPLOSION. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/7698

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Shahkarami, Setareh 1984-. “ICHNOLOGY OF THE EDIACARAN–CAMBRIAN TRANSITION: THE SOLTANIEH FORMATION OF NORTHERN IRAN AND ITS SIGNIFICANCE FOR UNDERSTANDING THE CAMBRIAN EXPLOSION.” 2016. Thesis, University of Saskatchewan. Accessed March 07, 2021. http://hdl.handle.net/10388/7698.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Shahkarami, Setareh 1984-. “ICHNOLOGY OF THE EDIACARAN–CAMBRIAN TRANSITION: THE SOLTANIEH FORMATION OF NORTHERN IRAN AND ITS SIGNIFICANCE FOR UNDERSTANDING THE CAMBRIAN EXPLOSION.” 2016. Web. 07 Mar 2021.

Vancouver:

Shahkarami S1. ICHNOLOGY OF THE EDIACARAN–CAMBRIAN TRANSITION: THE SOLTANIEH FORMATION OF NORTHERN IRAN AND ITS SIGNIFICANCE FOR UNDERSTANDING THE CAMBRIAN EXPLOSION. [Internet] [Thesis]. University of Saskatchewan; 2016. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10388/7698.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Shahkarami S1. ICHNOLOGY OF THE EDIACARAN–CAMBRIAN TRANSITION: THE SOLTANIEH FORMATION OF NORTHERN IRAN AND ITS SIGNIFICANCE FOR UNDERSTANDING THE CAMBRIAN EXPLOSION. [Thesis]. University of Saskatchewan; 2016. Available from: http://hdl.handle.net/10388/7698

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Saskatchewan

17. Shahkarami, Setareh 1984-. ICHNOLOGY OF THE EDIACARAN–CAMBRIAN TRANSITION: THE SOLTANIEH FORMATION OF NORTHERN IRAN AND ITS SIGNIFICANCE FOR UNDERSTANDING THE CAMBRIAN EXPLOSION.

Degree: 2016, University of Saskatchewan

URL: http://hdl.handle.net/10388/7699

► The Ediacaran–Cambrian transition is one of the most critical events in Earth history, a time of marked biological and sedimentary changes. The nature of the… (more)

▼ The Ediacaran–Cambrian transition is one of the most critical events in Earth history, a time of marked biological and sedimentary changes. The nature of the Cambrian explosion has been a major topic of discussion and numerous explanations have been posited for these dramatic changes. Strata in the Central Alborz Mountains, northern Iran are believed to show continuous sedimentation from Ediacaran through Cambrian times. The Soltanieh Formation consists of five members: Lower Dolomite, Lower Shale, Middle Dolomite, Upper Shale and Upper Dolomite members. This formation contains abundant trace fossils and displays a significant vertical facies recurrence, allowing comparison of identical environments through time. Four ichnozones have been recognized. Ichnozone I, containing Helminthopsis tenuis and Cochlichnus anguineus, is lower Fortunian based on small shelly fossils, and is interpreted as a distal expression of the Treptichnus pedum zone. Ichnozone II, comprising the first occurrence of T. pedum, is middle Fortunian, and is best regarded as the upper half of the Treptichnus pedum zone. Ichnozone III is late Fortunian–Cambrian Age 2, characterized by a sudden change in abundance and complexity of trace fossils. Cruziana problematica, Curvolithus isp., Helminthopsis tenuis, Palaeophycus tubularis, Phycodes isp., and Treptichnus pedum are common in this zone. Ichnozone IV is of Cambrian Age 2–Age 3, marked by the first appearances of Psammichnites gigas, Rusophycus avalonensis and Didymaulichnus miettensis. Integration of trace fossils with small shelly fossils suggests that the Ediacaran–Cambrian boundary should be placed at the base of Soltanieh Formation or within the Lower Dolomite Member. An integrated study of sedimentary facies, small shelly fossil zones, sequence stratigraphy, and distribution of associated trace fossils indicates that the delayed appearance of T. pedum and the low ichnodiversity in the Lower Shale reflect a complex interplay of evolutionary and ecological controls. The distribution and preservation of diagnostic early Cambrian trace fossils in the Lower Shale Member of the Soltanieh Formation is very likely to have been controlled by facies, whereas trace-fossil distribution in the Upper Shale Member is primarily controlled by evolutionary innovations. Our systematic review shows that significant diachronism was involved in the generation of the Great Unconformity suggesting that the sea-level fall that resulted in the formation of a sequnce boundary during the Ediacaran¬¬–Cambrian boundary dominantly reflects overprint of local tectonics on pure eustasy. Our results indicate that the sequnce boundary should not be used for inter-basin correlations. Advisors/Committee Members: Mángano, Gabriela, Buatois, Luis, Aitken, Alec, Cota-Sanchez, Hugo, Renaut , Robin, Morozov, Igor.

Subjects/Keywords: Cambrian Explosion; Ichnostratigraphy; evolutionary paleoecology; facies controls; macroevolution; sequence stratigraphy

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APA (6^th Edition):

Shahkarami, S. 1. (2016). ICHNOLOGY OF THE EDIACARAN–CAMBRIAN TRANSITION: THE SOLTANIEH FORMATION OF NORTHERN IRAN AND ITS SIGNIFICANCE FOR UNDERSTANDING THE CAMBRIAN EXPLOSION. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/7699

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Shahkarami, Setareh 1984-. “ICHNOLOGY OF THE EDIACARAN–CAMBRIAN TRANSITION: THE SOLTANIEH FORMATION OF NORTHERN IRAN AND ITS SIGNIFICANCE FOR UNDERSTANDING THE CAMBRIAN EXPLOSION.” 2016. Thesis, University of Saskatchewan. Accessed March 07, 2021. http://hdl.handle.net/10388/7699.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Shahkarami, Setareh 1984-. “ICHNOLOGY OF THE EDIACARAN–CAMBRIAN TRANSITION: THE SOLTANIEH FORMATION OF NORTHERN IRAN AND ITS SIGNIFICANCE FOR UNDERSTANDING THE CAMBRIAN EXPLOSION.” 2016. Web. 07 Mar 2021.

Vancouver:

Shahkarami S1. ICHNOLOGY OF THE EDIACARAN–CAMBRIAN TRANSITION: THE SOLTANIEH FORMATION OF NORTHERN IRAN AND ITS SIGNIFICANCE FOR UNDERSTANDING THE CAMBRIAN EXPLOSION. [Internet] [Thesis]. University of Saskatchewan; 2016. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10388/7699.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Shahkarami S1. ICHNOLOGY OF THE EDIACARAN–CAMBRIAN TRANSITION: THE SOLTANIEH FORMATION OF NORTHERN IRAN AND ITS SIGNIFICANCE FOR UNDERSTANDING THE CAMBRIAN EXPLOSION. [Thesis]. University of Saskatchewan; 2016. Available from: http://hdl.handle.net/10388/7699

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Harvard University

18. Creveling, Jessica. Sedimentology, Geochemistry, and Geophysics of the Cambrian Earth System.

Degree: PhD, Earth and Planetary Sciences, 2012, Harvard University

URL: http://nrs.harvard.edu/urn-3:HUL.InstRepos:9830350

►

Within this dissertation, I document how—and hypothesize why—the quirks and qualities of the Cambrian Period demarcate this interval as fundamentally different from the preceding Proterozoic… (more)

▼

Within this dissertation, I document how—and hypothesize why—the quirks and qualities of the Cambrian Period demarcate this interval as fundamentally different from the preceding Proterozoic Eon and succeeding periods of the Phanerozoic Eon. To begin, I focus on the anomalous marine deposition of the mineral apatite. Sedimentary sequestration of phosphorus modulates the capacity for marine primary productivity and, thus, the redox state of the Earth system. Moreover, sedimentary apatite minerals may entomb and replicate skeletal and soft-tissue organisms, creating key aspects of the fossil record from which paleontologists deduce the trajectory of animal evolution. I ask what geochemical redox regime promoted the delivery of phosphorus to Cambrian seafloors and conclude that, for the case of the Thorntonia Limestone, apatite nucleation occurred under anoxic, ferruginous subsurface water masses. Moreover, I infer that phosphorus bound to iron minerals precipitated from the water column and organic-bound phosphorus were both important sources of phosphorus to the seafloor. Petrographic observations allow me to reconstruct the early diagenetic pathways that decoupled phosphorus from these delivery shuttles and promoted the precipitation of apatite within the skeletons of small animals. Together, mechanistic understandings of phosphorus delivery to, and retention within, seafloor sediment allow us to constrain hypotheses for the fleeting occurrence of widespread apatite deposition and exquisite fossil preservation within Cambrian sedimentary successions. Next, I describe and quantify the nature of carbonate production on a marine platform deposited at the hypothesized peak of Cambrian skeletal carbonate production. I find that fossils represent conspicuous, but volumetrically subordinate components of early Cambrian carbonate reef ecosystems and that despite the evolution of mineralized skeletons, Cambrian carbonate platforms appear similar to their Neoproterozoic counterparts, primarily reflecting abiotic and microbial deposition. Finally, I investigate the geodynamic mechanism responsible for rapid, oscillatory true polar wander (TPW) events proposed for the Neoproterozoic and Phanerozoic Earth on the basis of paleomagnetic data. Using geodynamic models, I demonstrate that elastic strength in the lithosphere and stable excess ellipticity of Earth’s figure provided sufficient stabilization to return the pole to its original state subsequent to convectively-driven TPW.

Earth and Planetary Sciences

Advisors/Committee Members: Knoll, Andrew Herbert (advisor), Johnston, David (committee member), Schrag, Daniel (committee member).

Subjects/Keywords: Cambrian; carbonate; geochemistry; phosphorus; taphonomy; geobiology; biogeochemistry; geophysics; true polar wander

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Creveling, J. (2012). Sedimentology, Geochemistry, and Geophysics of the Cambrian Earth System. (Doctoral Dissertation). Harvard University. Retrieved from http://nrs.harvard.edu/urn-3:HUL.InstRepos:9830350

Chicago Manual of Style (16^th Edition):

Creveling, Jessica. “Sedimentology, Geochemistry, and Geophysics of the Cambrian Earth System.” 2012. Doctoral Dissertation, Harvard University. Accessed March 07, 2021. http://nrs.harvard.edu/urn-3:HUL.InstRepos:9830350.

MLA Handbook (7^th Edition):

Creveling, Jessica. “Sedimentology, Geochemistry, and Geophysics of the Cambrian Earth System.” 2012. Web. 07 Mar 2021.

Vancouver:

Creveling J. Sedimentology, Geochemistry, and Geophysics of the Cambrian Earth System. [Internet] [Doctoral dissertation]. Harvard University; 2012. [cited 2021 Mar 07]. Available from: http://nrs.harvard.edu/urn-3:HUL.InstRepos:9830350.

Council of Science Editors:

Creveling J. Sedimentology, Geochemistry, and Geophysics of the Cambrian Earth System. [Doctoral Dissertation]. Harvard University; 2012. Available from: http://nrs.harvard.edu/urn-3:HUL.InstRepos:9830350

University of Vermont

19. Maguire, Henry C. Application Of Geophysical And Geochronological Methods To Sedimentologic And Stratigraphic Problems In The Lower Cambrian Monkton Formation: Northwestern Vermont.

Degree: MS, Geology, 2018, University of Vermont

URL: https://scholarworks.uvm.edu/graddis/938

► The Monkton Formation of the western shelf stratigraphic sequence in Vermont (VT) is identified as a Lower Cambrian regressive sandstone unit containing parasequences recording… (more)

▼ The Monkton Formation of the western shelf stratigraphic sequence in Vermont (VT) is identified as a Lower Cambrian regressive sandstone unit containing parasequences recording tidal flat progradation. Previous workers identified cycles believed to represent parasequences in a portion of a 1034' deep geothermal well drilled at Champlain College in Burlington, Vermont. For this study, both outcrop and well geophysical surveys were completed to better identify gamma emission curves and relative values for parasequences and select lithologies that are indicators of bathymetry and sea level. After using physical stratigraphic techniques to assemble a composite stratigraphic section for the Monkton Formation, analysis of the gamma emission curve and relative gamma values resulted in the identification and characterization of parasequences and select lithologies within the Monkton. Interpretation of bathymetry-sensitive lithologies along with parasequence architecture and thickness trends reveals three distinctive intervals over the thickness of the Monkton. It is recognized that the succession of these intervals represents an overall decreasing rate in accommodation space generation through Monkton deposition. Previous workers have suggested that biostratigraphic relationships of the Monkton Formation to the Potsdam Group in New York (NY) suggest that that they would be at least partially correlative. To further refine age relationships and constrain and compare the provenance of the Vermont stratigraphy locally and regionally, zircon samples were collected from the Monkton and the overlying Danby Formations and radiometric age determinations were completed by laser ablation–inductively coupled plasma mass spectrometry (LA-ICPMS) at University of Arizona Laserchron Center. Zircon age probability distribution curves show two dominate age peaks between 1.05-1.09 Ga and 1.15-1.18 Ga for the Monkton and Danby suggesting either a continuity of provenance through the Cambrian or the cycling of the Monkton's sand. The 1.05-1.09 Ga age range corresponds to rocks generated during the Ottawan Orogeny while the 1.15-1.18 Ga range is associated with the Shawinigan Orogeny and anorthosite-mangerite-charnockite-granite (AMCG) plutonism. Dominant age peaks in the Vermont samples between 1.15-1.18 Ga are similar to the 1.16 Ga age peak reported by other workers from the Altona and Ausable Formations of the Potsdam Group of New York. The shared dominant age peak and close proximity of the Vermont and New York stratigraphy may suggest a primarily shared provenance. Advisors/Committee Members: Charlotte J. Mehrtens.

Subjects/Keywords: Cambrian; Monkton Formation; Parasequence; Sauk; Sedimentary Geology; Sequence Stratigraphy; Geology

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APA (6^th Edition):

Maguire, H. C. (2018). Application Of Geophysical And Geochronological Methods To Sedimentologic And Stratigraphic Problems In The Lower Cambrian Monkton Formation: Northwestern Vermont. (Thesis). University of Vermont. Retrieved from https://scholarworks.uvm.edu/graddis/938

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Maguire, Henry C. “Application Of Geophysical And Geochronological Methods To Sedimentologic And Stratigraphic Problems In The Lower Cambrian Monkton Formation: Northwestern Vermont.” 2018. Thesis, University of Vermont. Accessed March 07, 2021. https://scholarworks.uvm.edu/graddis/938.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Maguire, Henry C. “Application Of Geophysical And Geochronological Methods To Sedimentologic And Stratigraphic Problems In The Lower Cambrian Monkton Formation: Northwestern Vermont.” 2018. Web. 07 Mar 2021.

Vancouver:

Maguire HC. Application Of Geophysical And Geochronological Methods To Sedimentologic And Stratigraphic Problems In The Lower Cambrian Monkton Formation: Northwestern Vermont. [Internet] [Thesis]. University of Vermont; 2018. [cited 2021 Mar 07]. Available from: https://scholarworks.uvm.edu/graddis/938.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Maguire HC. Application Of Geophysical And Geochronological Methods To Sedimentologic And Stratigraphic Problems In The Lower Cambrian Monkton Formation: Northwestern Vermont. [Thesis]. University of Vermont; 2018. Available from: https://scholarworks.uvm.edu/graddis/938

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Adelaide

20. Holmes, James Dougal. Biogeographic and biological comparisons between the Emu Bay Shale (Kangaroo Island, South Australia) and other Cambrian Burgess Shale-type biotas.

Degree: 2016, University of Adelaide

URL: http://hdl.handle.net/2440/107383

► Konservat-Lagerstätten, or fossil deposits exhibiting exceptional preservation of non-biomineralised material, are particularly prevalent in the Cambrian, and offer us great insight into the evolution and… (more)

▼ Konservat-Lagerstätten, or fossil deposits exhibiting exceptional preservation of non-biomineralised material, are particularly prevalent in the Cambrian, and offer us great insight into the evolution and ecology of early animals and communities. The Emu Bay Shale (EBS) from the north coast of Kangaroo Island, South Australia, houses an early Cambrian (Series 3 – c. 514 Ma) Lagerstätte that contains over 50 species, including sponges, brachiopods, molluscs, annelids, priapulids, lobopodians, arthropods, vetulicolians, and several problematic taxa, making it the most diverse Burgess Shale-type (BST) biota in the southern hemisphere. While considerable work in describing taxa from the EBS Lagerstätte has been completed, less has been undertaken that focuses on the relationships between this and other Cambrian BST biotas. This project aims to examine some of the links between the EBS Lagerstätte and similar deposits from around the world, including the Burgess Shale (Canada), Chengjiang (China) and Sirius Passet (Greenland) biotas, amongst others. To this end, the project has two major parts. The first section aims to examine the biogeographic relationships between major Cambrian BST biotas from a global perspective. A substantial database of generic occurrence was constructed from the published literature, and analysed using various multivariate techniques in order to examine the relationships between these exceptionally preserved assemblages. Results suggest that both geographic distance and differences in age have an effect on the composition of BST biotas, and that assemblage similarity appears to increase through the Cambrian. The EBS biota is most closely related to other Gondwanan sites in South China, most likely reflecting a regional relationship. The second section involves a more focused description and interpretation of a single element of the EBS biota, namely an examination of the moulting habits of two common trilobite species from the Emu Bay Shale, Estaingia bilobata Pocock, 1964 and Redlichia takooensis Lu, 1950, and how this compares with other BST assemblages. Specimens from the EBS were examined and arrangements of exoskeletal elements likely representing moult ensembles identified, from which moulting behaviour was then inferred and compared. Analysis reveals that the EBS preserves a record of trilobite moulting unparalleled within other exceptionally preserved assemblages, representing a range of trilobite moulting behaviours, likely due to minimal water movement and relatively rapid burial within the biota’s unique inshore depositional setting. The unusual depositional setting of the EBS Lagerstätte seems to have had a minimal effect on the types of organisms present with the assemblage compared to other BST biotas. In contrast, this setting seems to have facilitated the preservation of an exceptional moulting record not found at other sites, including BST deposits. This, coupled with the unique preservation of certain structures such as eyes, confirms that the EBS is of great importance in… Advisors/Committee Members: Garcia-Bellido, Diego (advisor), Lee, Michael Soon Yoong (advisor), Bradshaw, Corey (advisor), School of Biological Sciences (school).

Subjects/Keywords: palaeontology; Cambrian; Trilobite; biogeography; BST; Burgess Shale; Research by Publication

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APA (6^th Edition):

Holmes, J. D. (2016). Biogeographic and biological comparisons between the Emu Bay Shale (Kangaroo Island, South Australia) and other Cambrian Burgess Shale-type biotas. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/107383

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Holmes, James Dougal. “Biogeographic and biological comparisons between the Emu Bay Shale (Kangaroo Island, South Australia) and other Cambrian Burgess Shale-type biotas.” 2016. Thesis, University of Adelaide. Accessed March 07, 2021. http://hdl.handle.net/2440/107383.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Holmes, James Dougal. “Biogeographic and biological comparisons between the Emu Bay Shale (Kangaroo Island, South Australia) and other Cambrian Burgess Shale-type biotas.” 2016. Web. 07 Mar 2021.

Vancouver:

Holmes JD. Biogeographic and biological comparisons between the Emu Bay Shale (Kangaroo Island, South Australia) and other Cambrian Burgess Shale-type biotas. [Internet] [Thesis]. University of Adelaide; 2016. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2440/107383.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Holmes JD. Biogeographic and biological comparisons between the Emu Bay Shale (Kangaroo Island, South Australia) and other Cambrian Burgess Shale-type biotas. [Thesis]. University of Adelaide; 2016. Available from: http://hdl.handle.net/2440/107383

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

21. Stripe, Miranda. New middle Cambrian hyolith genus and species and echinoderm ossicles from the Georgina Basin, Australia.

Degree: 2015, University of California – eScholarship, University of California

URL: http://www.escholarship.org/uc/item/8kz7180g

► The study herein describes a new genus and species of orthothecid hyolith and numerous echinoderm ossicles. The internal mold of the hyolith bears an apical… (more)

Subjects/Keywords: Paleontology; Cambrian; echinoderm; Georgina Basin; hyolith; small shelly fossil

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Stripe, M. (2015). New middle Cambrian hyolith genus and species and echinoderm ossicles from the Georgina Basin, Australia. (Thesis). University of California – eScholarship, University of California. Retrieved from http://www.escholarship.org/uc/item/8kz7180g

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Stripe, Miranda. “New middle Cambrian hyolith genus and species and echinoderm ossicles from the Georgina Basin, Australia.” 2015. Thesis, University of California – eScholarship, University of California. Accessed March 07, 2021. http://www.escholarship.org/uc/item/8kz7180g.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Stripe, Miranda. “New middle Cambrian hyolith genus and species and echinoderm ossicles from the Georgina Basin, Australia.” 2015. Web. 07 Mar 2021.

Vancouver:

Stripe M. New middle Cambrian hyolith genus and species and echinoderm ossicles from the Georgina Basin, Australia. [Internet] [Thesis]. University of California – eScholarship, University of California; 2015. [cited 2021 Mar 07]. Available from: http://www.escholarship.org/uc/item/8kz7180g.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Stripe M. New middle Cambrian hyolith genus and species and echinoderm ossicles from the Georgina Basin, Australia. [Thesis]. University of California – eScholarship, University of California; 2015. Available from: http://www.escholarship.org/uc/item/8kz7180g

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Adelaide

22. Jago, J. B. (James Bernard). Biostratigraphic and taxonomic studies of some Tasmanian Cambrian trilobites.

Degree: 1972, University of Adelaide

URL: http://hdl.handle.net/2440/20794

Subjects/Keywords: Trilobites; Paleontology Cambrian; Paleontology Tasmania

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APA (6^th Edition):

Jago, J. B. (. B. (1972). Biostratigraphic and taxonomic studies of some Tasmanian Cambrian trilobites. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/20794

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Jago, J B (James Bernard). “Biostratigraphic and taxonomic studies of some Tasmanian Cambrian trilobites.” 1972. Thesis, University of Adelaide. Accessed March 07, 2021. http://hdl.handle.net/2440/20794.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Jago, J B (James Bernard). “Biostratigraphic and taxonomic studies of some Tasmanian Cambrian trilobites.” 1972. Web. 07 Mar 2021.

Vancouver:

Jago JB(B. Biostratigraphic and taxonomic studies of some Tasmanian Cambrian trilobites. [Internet] [Thesis]. University of Adelaide; 1972. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2440/20794.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Jago JB(B. Biostratigraphic and taxonomic studies of some Tasmanian Cambrian trilobites. [Thesis]. University of Adelaide; 1972. Available from: http://hdl.handle.net/2440/20794

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University College London (University of London)

23. Aris-Brosou, Stephane. Bayesian molecular phylogenetics : estimation of divergence dates and hypothesis testing.

Degree: PhD, 2002, University College London (University of London)

URL: https://discovery.ucl.ac.uk/id/eprint/1317866/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289864

► With the advent of automated sequencing, sequence data are now available to help us understand the functioning of our genome, as well as its history.… (more)

Subjects/Keywords: 572.8; Morphological Cambrian explosion

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APA (6^th Edition):

Aris-Brosou, S. (2002). Bayesian molecular phylogenetics : estimation of divergence dates and hypothesis testing. (Doctoral Dissertation). University College London (University of London). Retrieved from https://discovery.ucl.ac.uk/id/eprint/1317866/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289864

Chicago Manual of Style (16^th Edition):

Aris-Brosou, Stephane. “Bayesian molecular phylogenetics : estimation of divergence dates and hypothesis testing.” 2002. Doctoral Dissertation, University College London (University of London). Accessed March 07, 2021. https://discovery.ucl.ac.uk/id/eprint/1317866/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289864.

MLA Handbook (7^th Edition):

Aris-Brosou, Stephane. “Bayesian molecular phylogenetics : estimation of divergence dates and hypothesis testing.” 2002. Web. 07 Mar 2021.

Vancouver:

Aris-Brosou S. Bayesian molecular phylogenetics : estimation of divergence dates and hypothesis testing. [Internet] [Doctoral dissertation]. University College London (University of London); 2002. [cited 2021 Mar 07]. Available from: https://discovery.ucl.ac.uk/id/eprint/1317866/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289864.

Council of Science Editors:

Aris-Brosou S. Bayesian molecular phylogenetics : estimation of divergence dates and hypothesis testing. [Doctoral Dissertation]. University College London (University of London); 2002. Available from: https://discovery.ucl.ac.uk/id/eprint/1317866/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289864

Montana State University

24. Fryxell, Jenny Christine. Depositional environments and provenance of arkosic sandstone, Park shale, middle Cambrian, Bridger Range, southwestern Montana.

Degree: MS, College of Letters & Science, 1982, Montana State University

URL: https://scholarworks.montana.edu/xmlui/handle/1/3692

Subjects/Keywords: Geology, Stratigraphic Cambrian.; Sandstone.

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APA (6^th Edition):

Fryxell, J. C. (1982). Depositional environments and provenance of arkosic sandstone, Park shale, middle Cambrian, Bridger Range, southwestern Montana. (Masters Thesis). Montana State University. Retrieved from https://scholarworks.montana.edu/xmlui/handle/1/3692

Chicago Manual of Style (16^th Edition):

Fryxell, Jenny Christine. “Depositional environments and provenance of arkosic sandstone, Park shale, middle Cambrian, Bridger Range, southwestern Montana.” 1982. Masters Thesis, Montana State University. Accessed March 07, 2021. https://scholarworks.montana.edu/xmlui/handle/1/3692.

MLA Handbook (7^th Edition):

Fryxell, Jenny Christine. “Depositional environments and provenance of arkosic sandstone, Park shale, middle Cambrian, Bridger Range, southwestern Montana.” 1982. Web. 07 Mar 2021.

Vancouver:

Fryxell JC. Depositional environments and provenance of arkosic sandstone, Park shale, middle Cambrian, Bridger Range, southwestern Montana. [Internet] [Masters thesis]. Montana State University; 1982. [cited 2021 Mar 07]. Available from: https://scholarworks.montana.edu/xmlui/handle/1/3692.

Council of Science Editors:

Fryxell JC. Depositional environments and provenance of arkosic sandstone, Park shale, middle Cambrian, Bridger Range, southwestern Montana. [Masters Thesis]. Montana State University; 1982. Available from: https://scholarworks.montana.edu/xmlui/handle/1/3692

University of Toronto

25. Nanglu, Karma. Revisiting the Cambrian Burgess Shale Palaeocommunity in Light of New Field Discoveries from Marble Canyon, Kootenay National Park, British Columbia.

Degree: PhD, 2019, University of Toronto

URL: http://hdl.handle.net/1807/94075

► The 508-million-year-old Burgess Shale (British Columbia) is among the most important fossil localities in the world as it provides a direct window into the Cambrian… (more)

▼ The 508-million-year-old Burgess Shale (British Columbia) is among the most important fossil localities in the world as it provides a direct window into the Cambrian Explosion, the phenomenon whereby most metazoan groups appeared rapidly in the fossil record for the first time. For over 100 years, Burgess Shale fossils have provided unique insights into the early evolutionary history of animal life, but a holistic description of the community ecology of the Burgess Shale has remained elusive. This dissertation aims to reinvestigate the Burgess Shale paleocommunity in light of the recently discovered Marble Canyon fossil site in Kootenay National Park, integrating this new dataset with those from the type areas in Yoho National Park, 40km to the northwest (Walcott Quarry, Raymond Quarry, and Tulip Beds). The first three chapters of this dissertation focus on the organismal level. An experimental decay study (Chapter 1) provides a framework for the interpretation of taphonomic bias in community reconstructions. The redescription of three enigmatic Cambrian taxa (Chapters 2 and 3) provide novel phylogenetic and ecological information for understanding the patterns of diversity and niche structure at Marble Canyon. The community analysis (Chapter 4) represents the largest quantitative study of the Burgess Shale to date. Patterns of faunal stasis between most adjacent bedding assemblages followed by periodic variations in abundance and species identity are found at both Marble Canyon and Walcott Quarry, the two best-studied sites with the finest level of stratigraphic/temporal data. Across the entire Burgess Shale paleocommunity, major shifts in representative taxonomic groups and ecological modes occur between major localities. The results of this work suggest that the Burgess Shale as a paleocommunity was highly heterogeneous in both its taxonomic and ecological composition. Shifting abiotic and environmental variables are determined to be more significant in the long-term structuring of Burgess Shale communities than species interactions such as predation, which was previously considered paramount. Advisors/Committee Members: Caron, Jean-Bernard, Ecology and Evolutionary Biology.

Subjects/Keywords: Burgess Shale; Cambrian; Community ecology; Evolutionary Biology; Paleoecology; Paleontology; 0418

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APA (6^th Edition):

Nanglu, K. (2019). Revisiting the Cambrian Burgess Shale Palaeocommunity in Light of New Field Discoveries from Marble Canyon, Kootenay National Park, British Columbia. (Doctoral Dissertation). University of Toronto. Retrieved from http://hdl.handle.net/1807/94075

Chicago Manual of Style (16^th Edition):

Nanglu, Karma. “Revisiting the Cambrian Burgess Shale Palaeocommunity in Light of New Field Discoveries from Marble Canyon, Kootenay National Park, British Columbia.” 2019. Doctoral Dissertation, University of Toronto. Accessed March 07, 2021. http://hdl.handle.net/1807/94075.

MLA Handbook (7^th Edition):

Nanglu, Karma. “Revisiting the Cambrian Burgess Shale Palaeocommunity in Light of New Field Discoveries from Marble Canyon, Kootenay National Park, British Columbia.” 2019. Web. 07 Mar 2021.

Vancouver:

Nanglu K. Revisiting the Cambrian Burgess Shale Palaeocommunity in Light of New Field Discoveries from Marble Canyon, Kootenay National Park, British Columbia. [Internet] [Doctoral dissertation]. University of Toronto; 2019. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1807/94075.

Council of Science Editors:

Nanglu K. Revisiting the Cambrian Burgess Shale Palaeocommunity in Light of New Field Discoveries from Marble Canyon, Kootenay National Park, British Columbia. [Doctoral Dissertation]. University of Toronto; 2019. Available from: http://hdl.handle.net/1807/94075

University of Maryland

26. Tweedt, Sarah Maureen. Development and the Early Animal Fossil Record: Evolution and Phylogenetic Applications.

Degree: Cell Biology & Molecular Genetics, 2016, University of Maryland

URL: http://hdl.handle.net/1903/19325

► Although evolutionary developmental biology and paleontology are linked by the study of morphology, the application of development to paleontological questions has only recently become more… (more)

▼ Although evolutionary developmental biology and paleontology are linked by the study of morphology, the application of development to paleontological questions has only recently become more prominent. The growth of a robust developmental genetic framework for studying the origin and evolution of morphological features, however, holds great promise for understanding ancient animal life. As paleontology provides the historical record as well as the temporal and environmental context of past morphological evolution, uniting knowledge of developmental genetic systems with this historical record will form a key synthetic approach to understanding the early evolution of developmental processes. Ultimately unraveling the sequence of ancient animal developmental evolution will require combining analysis of comparative developmental data, critical assessment of fossil morphology within a developmental framework, and the targeted exploration of specific geologic periods to fill in the missing record of key times in animal developmental evolution. This study addresses each of these three approaches. First, I provide a new compilation and evaluation of recent comparative and experimental developmental biology data to review the nature of developmental ‘toolkits’ at the origin of the most basal animal clades. I reconstruct early animal developmental capacities and integrate these data within a temporal framework to better understand the context of earliest animal development. Second, I assess longstanding evolutionary hypotheses about the origin of the panarthropod clade and the phylogenetic position of Cambrian ‘lobopod’ fossils by examining signal present within current morphological datasets. I apply new methods to fossil panarthropod phylogeny estimation and suggest strategies for developmentally-informed phylogenetic coding of morphological data. Third, I present the discovery of the oldest spicule-bearing fossil sponges in the rock record, which co-occur in latest Ediacaran strata with classic enigmatic Ediacaran fauna. I provide a formal systematic description of fossil material from localities in both Nevada and southern Namibia. The combined approaches presented herein are a first step towards a deeper integration of developmental principles in the study and discovery of ancient animal life, and contribute to our understanding of the evolution of ancient animal developmental processes. Advisors/Committee Members: Delwiche, Charles F (advisor), Erwin, Douglas H (advisor).

Subjects/Keywords: Paleontology; Developmental biology; Evolution & development; Cambrian; Development; Ediacaran; Morphology; Phylogeny

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APA (6^th Edition):

Tweedt, S. M. (2016). Development and the Early Animal Fossil Record: Evolution and Phylogenetic Applications. (Thesis). University of Maryland. Retrieved from http://hdl.handle.net/1903/19325

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Tweedt, Sarah Maureen. “Development and the Early Animal Fossil Record: Evolution and Phylogenetic Applications.” 2016. Thesis, University of Maryland. Accessed March 07, 2021. http://hdl.handle.net/1903/19325.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Tweedt, Sarah Maureen. “Development and the Early Animal Fossil Record: Evolution and Phylogenetic Applications.” 2016. Web. 07 Mar 2021.

Vancouver:

Tweedt SM. Development and the Early Animal Fossil Record: Evolution and Phylogenetic Applications. [Internet] [Thesis]. University of Maryland; 2016. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1903/19325.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Tweedt SM. Development and the Early Animal Fossil Record: Evolution and Phylogenetic Applications. [Thesis]. University of Maryland; 2016. Available from: http://hdl.handle.net/1903/19325

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Montana

27. Duncan, Donald C. Upper Cambrian trilobites from Montana and Yellowstone National Park.

Degree: MA, 1937, University of Montana

URL: https://scholarworks.umt.edu/etd/7073

Subjects/Keywords: Trilobites.; Paleontology Montana.; Paleontology Cambrian.

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APA (6^th Edition):

Duncan, D. C. (1937). Upper Cambrian trilobites from Montana and Yellowstone National Park. (Masters Thesis). University of Montana. Retrieved from https://scholarworks.umt.edu/etd/7073

Chicago Manual of Style (16^th Edition):

Duncan, Donald C. “Upper Cambrian trilobites from Montana and Yellowstone National Park.” 1937. Masters Thesis, University of Montana. Accessed March 07, 2021. https://scholarworks.umt.edu/etd/7073.

MLA Handbook (7^th Edition):

Duncan, Donald C. “Upper Cambrian trilobites from Montana and Yellowstone National Park.” 1937. Web. 07 Mar 2021.

Vancouver:

Duncan DC. Upper Cambrian trilobites from Montana and Yellowstone National Park. [Internet] [Masters thesis]. University of Montana; 1937. [cited 2021 Mar 07]. Available from: https://scholarworks.umt.edu/etd/7073.

Council of Science Editors:

Duncan DC. Upper Cambrian trilobites from Montana and Yellowstone National Park. [Masters Thesis]. University of Montana; 1937. Available from: https://scholarworks.umt.edu/etd/7073

University of Montana

28. Enterline, Theodore R. Depositional environment of the Pagoda Pentagon and Steamboat formations (Middle Cambrian) northwest Montana.

Degree: MS, 1978, University of Montana

URL: https://scholarworks.umt.edu/etd/7179

Subjects/Keywords: Geology; Stratigraphic Cambrian.; Geology Montana.

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APA (6^th Edition):

Enterline, T. R. (1978). Depositional environment of the Pagoda Pentagon and Steamboat formations (Middle Cambrian) northwest Montana. (Masters Thesis). University of Montana. Retrieved from https://scholarworks.umt.edu/etd/7179

Chicago Manual of Style (16^th Edition):

Enterline, Theodore R. “Depositional environment of the Pagoda Pentagon and Steamboat formations (Middle Cambrian) northwest Montana.” 1978. Masters Thesis, University of Montana. Accessed March 07, 2021. https://scholarworks.umt.edu/etd/7179.

MLA Handbook (7^th Edition):

Enterline, Theodore R. “Depositional environment of the Pagoda Pentagon and Steamboat formations (Middle Cambrian) northwest Montana.” 1978. Web. 07 Mar 2021.

Vancouver:

Enterline TR. Depositional environment of the Pagoda Pentagon and Steamboat formations (Middle Cambrian) northwest Montana. [Internet] [Masters thesis]. University of Montana; 1978. [cited 2021 Mar 07]. Available from: https://scholarworks.umt.edu/etd/7179.

Council of Science Editors:

Enterline TR. Depositional environment of the Pagoda Pentagon and Steamboat formations (Middle Cambrian) northwest Montana. [Masters Thesis]. University of Montana; 1978. Available from: https://scholarworks.umt.edu/etd/7179

University of Montana

29. Pearson, Monte Laurence. Carbonate petrology of the "upper Hasmark" Cambrian of southwestern Montana.

Degree: MS, 1974, University of Montana

URL: https://scholarworks.umt.edu/etd/9269

Subjects/Keywords: Geology; Stratigraphic Cambrian.; Petrology Montana.

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APA (6^th Edition):

Pearson, M. L. (1974). Carbonate petrology of the "upper Hasmark" Cambrian of southwestern Montana. (Masters Thesis). University of Montana. Retrieved from https://scholarworks.umt.edu/etd/9269

Chicago Manual of Style (16^th Edition):

Pearson, Monte Laurence. “Carbonate petrology of the "upper Hasmark" Cambrian of southwestern Montana.” 1974. Masters Thesis, University of Montana. Accessed March 07, 2021. https://scholarworks.umt.edu/etd/9269.

MLA Handbook (7^th Edition):

Pearson, Monte Laurence. “Carbonate petrology of the "upper Hasmark" Cambrian of southwestern Montana.” 1974. Web. 07 Mar 2021.

Vancouver:

Pearson ML. Carbonate petrology of the "upper Hasmark" Cambrian of southwestern Montana. [Internet] [Masters thesis]. University of Montana; 1974. [cited 2021 Mar 07]. Available from: https://scholarworks.umt.edu/etd/9269.

Council of Science Editors:

Pearson ML. Carbonate petrology of the "upper Hasmark" Cambrian of southwestern Montana. [Masters Thesis]. University of Montana; 1974. Available from: https://scholarworks.umt.edu/etd/9269

Utah State University

30. Jensen, Christopher Ryan. Sequence Stratigraphy, Depositional Environments and Geochemistry of the middle Cambrian Bloomington Formation in Northern Utah.

Degree: MS, Geology, 2015, Utah State University

URL: https://digitalcommons.usu.edu/etd/4231

► The Bloomington Formation (~425 m thick) is a latest Middle Cambrian (~506.5-505 Ma), mixed, warm water, continental-shelf carbonate and fine-grained siliciclastic unit on the… (more)

▼ The Bloomington Formation (~425 m thick) is a latest Middle Cambrian (~506.5-505 Ma), mixed, warm water, continental-shelf carbonate and fine-grained siliciclastic unit on the Cordilleran passive margin exposed in northern Utah and southern Idaho. Thicknesses of the Bloomington Formation at Calls Fort Canyon are 111 m in the Hodges Shale Member, 230 m in the middle limestone Member, and 84 m in the Calls Fort Shale Member. The Hodges Shale and Calls Fort Shale Members are shale dominated and represent outer detrital belt deposition. The Logan Canyon outcrop of the Hodges Shale Member shows an environmental change that may represent a transition form an open marine facies into what appears to be a lagoonal facies. The middle limestone member represents shallow marine carbonate deposition on the passive margin shelf. The Bloomington Formation has a low fossil abundance and diversity when compared to correlative units such as the Wheeler and Marjum Formations. There are, however, 10-50 cm thrombolite bioherms, associated with Girvanella oncoliths. These bioherms indicate a shallow-water carbonate facies that experienced a small flooding event that gives the bioherms time and proper conditions to build up. δ¹⁸O and δ¹³C results both show positive and negative shifts with δ13CVPDB values of 1.0 to -4.7 per mil and δ¹⁸O_VSMOW values of -12.9 to -20.8 per mil. A negative δ¹³C excursion in the Hodges Shale may correlate to a similar excursion in the base of the Wheeler Formation that represents the DICE event. Lower and Middle Cambrian Formations in the Wellsville Range have been interpreted as being part of a second order transgressive system and containing third and higher-order cycles. The contact of the Hodges Shale Member and the underlying Blacksmith Dolomite represents a flooding surface and a sequence boundary, followed by a third order cycle. Flooding is indicated by shale deposits that overlie carbonates with a shallowing upward trend. High frequency fourth or fifth order cycles are expressed as laminated shale and thick-bedded limestones as well as thick packages of interbedded, thin limestones and shales. A PCA analysis of thin section point counts indicates that the limestone lithologies of all three members repeat throughout the entire Formation, suggesting cycles of relative sea level rise that cause repeating facies. Advisors/Committee Members: W. David Liddell, ;.

Subjects/Keywords: Sequence; stratigraphy; depositional; environments; geochemistry; middle; cambrian; Geology

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Jensen, C. R. (2015). Sequence Stratigraphy, Depositional Environments and Geochemistry of the middle Cambrian Bloomington Formation in Northern Utah. (Masters Thesis). Utah State University. Retrieved from https://digitalcommons.usu.edu/etd/4231

Chicago Manual of Style (16^th Edition):

Jensen, Christopher Ryan. “Sequence Stratigraphy, Depositional Environments and Geochemistry of the middle Cambrian Bloomington Formation in Northern Utah.” 2015. Masters Thesis, Utah State University. Accessed March 07, 2021. https://digitalcommons.usu.edu/etd/4231.

MLA Handbook (7^th Edition):

Jensen, Christopher Ryan. “Sequence Stratigraphy, Depositional Environments and Geochemistry of the middle Cambrian Bloomington Formation in Northern Utah.” 2015. Web. 07 Mar 2021.

Vancouver:

Jensen CR. Sequence Stratigraphy, Depositional Environments and Geochemistry of the middle Cambrian Bloomington Formation in Northern Utah. [Internet] [Masters thesis]. Utah State University; 2015. [cited 2021 Mar 07]. Available from: https://digitalcommons.usu.edu/etd/4231.

Council of Science Editors:

Jensen CR. Sequence Stratigraphy, Depositional Environments and Geochemistry of the middle Cambrian Bloomington Formation in Northern Utah. [Masters Thesis]. Utah State University; 2015. Available from: https://digitalcommons.usu.edu/etd/4231

Open Access Theses and Dissertations