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You searched for +publisher:"University of Arizona" +contributor:("Peirce, H. Wesley"). Showing records 1 – 2 of 2 total matches.

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University of Arizona

1. Harding, Lucy Elizabeth, 1953-. TECTONIC SIGNIFICANCE OF THE MCCOY MOUNTAINS FORMATION, SOUTHEASTERN CALIFORNIA AND SOUTHWESTERN ARIZONA .

Degree: 1982, University of Arizona

Poorly preserved fossil wood collected throughout the terrane had been the basis of a Cretaceous age assignment. New age constraints come from paleomagnetic data which fail the fold test at both regional and local levels. These data indicate that the paleomagnetism was produced by a post-folding metamorphic event. The resulting paleomagnetic pole at 58.9°N, 114.6°E falls on the North American apparent polar wander path very near a pole from the Callovian Summerville Formation. These data imply that Callovian is a minimum age for the metamorphism and that the proto1ith is older. Advisors/Committee Members: Butler, Robert (advisor), Coney, Peter J. (committeemember), Dickinson, William R. (committeemember), Peirce, H. Wesley (committeemember), Davis, George H. (committeemember).

Subjects/Keywords: Geology  – Arizona  – Yuma County.; Geology  – California  – Riverside County.; Geology, Stratigraphic  – Mesozoic.; Geology, Structural.

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

APA (6th Edition):

Harding, Lucy Elizabeth, 1. (1982). TECTONIC SIGNIFICANCE OF THE MCCOY MOUNTAINS FORMATION, SOUTHEASTERN CALIFORNIA AND SOUTHWESTERN ARIZONA . (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/187528

Chicago Manual of Style (16th Edition):

Harding, Lucy Elizabeth, 1953-. “TECTONIC SIGNIFICANCE OF THE MCCOY MOUNTAINS FORMATION, SOUTHEASTERN CALIFORNIA AND SOUTHWESTERN ARIZONA .” 1982. Doctoral Dissertation, University of Arizona. Accessed December 14, 2019. http://hdl.handle.net/10150/187528.

MLA Handbook (7th Edition):

Harding, Lucy Elizabeth, 1953-. “TECTONIC SIGNIFICANCE OF THE MCCOY MOUNTAINS FORMATION, SOUTHEASTERN CALIFORNIA AND SOUTHWESTERN ARIZONA .” 1982. Web. 14 Dec 2019.

Vancouver:

Harding, Lucy Elizabeth 1. TECTONIC SIGNIFICANCE OF THE MCCOY MOUNTAINS FORMATION, SOUTHEASTERN CALIFORNIA AND SOUTHWESTERN ARIZONA . [Internet] [Doctoral dissertation]. University of Arizona; 1982. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/10150/187528.

Council of Science Editors:

Harding, Lucy Elizabeth 1. TECTONIC SIGNIFICANCE OF THE MCCOY MOUNTAINS FORMATION, SOUTHEASTERN CALIFORNIA AND SOUTHWESTERN ARIZONA . [Doctoral Dissertation]. University of Arizona; 1982. Available from: http://hdl.handle.net/10150/187528


University of Arizona

2. Reynolds, Stephen James. GEOLOGY AND GEOCHRONOLOGY OF THE SOUTH MOUNTAINS, CENTRAL ARIZONA .

Degree: 1982, University of Arizona

The South Mountains are composed of two fundamentally different terranes. The western half of the range consists of Precambrian metamorphic and granitic rocks, whereas the eastern half is dominated by a composite middle Tertiary pluton. North-northwest-trending, middle Tertiary dikes have extensively intruded both terranes. A major episode of middle Proterozoic metamorphism and deformation produced a steep crystalloblastic foliation that generally strikes northeast. Middle Tertiary plutonism was accompanied by intense mylonitization that affected Precambrian and middle Tertiary rocks alike. Discrete phases of mylonitization were associated with each intrusive pulse between 28 and 25 m.y.B.P. Mylonitization generally produced a lowangle foliation and east-northeast-trending lineation. The attitude of mylonitic foliation defines a broad, east-northeast-trending anticline that controls the topographic axis of the range. Structurally low rocks in the core of the anticline are nonmylonitic, but intensity of mylonitic fabric increases progressively toward higher structural levels. Mylonitic Tertiary plutonic rocks are exposed as a gently dipping carapace overlying their less deformed equivalents. Mylonitic fabric cuts through the Precambrian terrane as a broad, west-dipping zone. Rocks above and below this mylonitic zone are lithologically identical and mostly retain their Precambrian structure. Fabrics in all rock types indicate that mylonitization resulted from extension parallel to east-northeast-trending lineation and flattening perpendicular to subhorizontal foliation. Mylonitization occurred under conditions of elevated temperature but relatively low confining pressure. Gold-bearing quartz veins occur in tension fractures that are late- to post-kinematic with respect to mylonitic deformation. Mylonitization was succeeded by more brittle deformation that produced chloritic breccia and microbreccia in the footwall of a major detachment fault that dips gently to the east. The detachment fault and underlying breccia were formed by normal faulting and brittle extension in an east-northeast direction. Rocks above and immediately below the detachment fault were antithetically rotated during faulting. Mylonitization, detachment faulting, and formation of the main east-northeast-trending anticline are all manifestations of eastnortheast-directed, middle Tertiary extension. Evidence for a possible continuum between mylonitization and detachment faulting has important implications regarding the evolution of Cordilleran metamorphic core complexes. Advisors/Committee Members: Coney, Peter J (advisor), Davis, George H. (committeemember), Damon, Paul E. (committeemember), Guilbert, John M. (committeemember), Peirce, H. Wesley (committeemember), Dickinson, William R. (committeemember).

Subjects/Keywords: Geology  – Arizona  – South Mountains.; Geological time.

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

APA (6th Edition):

Reynolds, S. J. (1982). GEOLOGY AND GEOCHRONOLOGY OF THE SOUTH MOUNTAINS, CENTRAL ARIZONA . (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/187531

Chicago Manual of Style (16th Edition):

Reynolds, Stephen James. “GEOLOGY AND GEOCHRONOLOGY OF THE SOUTH MOUNTAINS, CENTRAL ARIZONA .” 1982. Doctoral Dissertation, University of Arizona. Accessed December 14, 2019. http://hdl.handle.net/10150/187531.

MLA Handbook (7th Edition):

Reynolds, Stephen James. “GEOLOGY AND GEOCHRONOLOGY OF THE SOUTH MOUNTAINS, CENTRAL ARIZONA .” 1982. Web. 14 Dec 2019.

Vancouver:

Reynolds SJ. GEOLOGY AND GEOCHRONOLOGY OF THE SOUTH MOUNTAINS, CENTRAL ARIZONA . [Internet] [Doctoral dissertation]. University of Arizona; 1982. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/10150/187531.

Council of Science Editors:

Reynolds SJ. GEOLOGY AND GEOCHRONOLOGY OF THE SOUTH MOUNTAINS, CENTRAL ARIZONA . [Doctoral Dissertation]. University of Arizona; 1982. Available from: http://hdl.handle.net/10150/187531

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