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Table of Contents - Special Paper 463

Miocene Tectonics of the Lake Mead Region, Central Basin and Range

Edited by Paul J. Umhoefer, L. Sue Beard, and Melissa A. Lamb


Dedication v

Introduction
1. Geology of the Lake Mead region: An overview
R. Ernest Anderson and L. Sue Beard
1
2. Geologic map of Lake Mead and surrounding regions, southern Nevada, southwestern Utah, and northwestern Arizona
Tracey J. Felger and L. Sue Beard
29

Geophysics
3. Implications of geophysical analysis on basin geometry and fault offsets in the northern Colorado River extensional corridor and adjoining Lake Mead region, Nevada and Arizona
Victoria E. Langenheim, L. Sue Beard, and James E. Faulds
39

Basins and Stratigraphy
4. Development of the Salt Spring Wash Basin in a reentrant in the hanging wall of the South Virgin—White Hills detachment fault, Lake Mead domain, northwest Arizona
Nathan Blythe, Paul J. Umhoefer, Ernest M. Duebendorfer, William C. McIntosh, and Lisa Peters
61
5. A chronicle of Miocene extension near the Colorado Plateau—Basin and Range boundary, southern White Hills, northwestern Arizona: Paleogeographic and tectonic implications
James E. Faulds, Linda M. Price, Lawrence W. Snee, and Phillip B. Gans
87
6. Miocene tectonics and climate in the Lake Mead region recorded by Horse Spring Formation carbonates
Thomas A. Hickson, Anders J. Ness, and Melissa A. Lamb
121
7. Erosion of tilted fault blocks and deposition of coarse sediments in half-graben basins during late stages of extension: Gold Butte area, Basin and Range Province
Keith A. Howard, L. Sue Beard, M.A. Kuntz, M.J. Kunk, A.M. Sarna-Wojcicki, M.E. Perkins, and Ivo Lucchitta
147
8. Stratigraphy and age of the Lower Horse Spring Formation in the Longwell Ridges area, southern Nevada: Implications for tectonic interpretations
Melissa A. Lamb, K. Luke Martin, Thomas A. Hickson, Paul J. Umhoefer, and Laura Eaton
171
9. Volcanoes of the McCullough Range, southern Nevada
Eugene Smith, Denise Honn, and Racheal Johnsen
203
10. Development of Gregg Basin and the southwestern Grand Wash Trough during late-stage faulting in eastern Lake Mead, Arizona
Paul J. Umhoefer, Ernest M. Duebendorfer, Nathan Blythe, Zack A. Swaney, L. Sue Beard, and William C. McIntosh
221

Structure
11. Geometry and kinematics of the eastern Lake Mead fault system in the Virgin Mountains, Nevada and Arizona
L. Sue Beard, David J. Campagna, and R. Ernest Anderson
243
12. The South Virgin–White Hills detachment fault, southeastern Nevada and northwestern Arizona: Significance, displacement gradient, and corrugation formation
Ernest M. Duebendorfer, James E. Faulds, and Joan E. Fryxell
275
13. Secondary normal faulting in the Lake Mead fault system and implications for regional fault mechanics
Scott T. Marshall, Simon A. Kattenhorn, and Michele L. Cooke
289
14. Timing and mechanisms of basement uplift and exhumation in the Colorado Plateau—Basin and Range transition zone, Virgin Mountain anticline, Nevada-Arizona
Mark C. Quigley, Karl E. Karlstrom, Shari Kelley, and Matt Heizler
311

Model Papers
15. Structure and 40Ar/39Ar K-feldspar thermal history of the Gold Butte block: Reevaluation of the tilted crustal section model
Karl E. Karlstrom, Matt Heizler, and Mark C. Quigley
331
16. New core complex model for the South Virgin–White Hills detachment and extension in the eastern Lake Mead area, southern Nevada and northwestern Arizona
Zack A. Swaney, Ernest M. Duebendorfer, Paul G. Fitzgerald, and William C. McIntosh
353
17. From detachment to transtensional faulting: A model for the Lake Mead extensional domain based on new ages and correlation of subbasins
Paul J. Umhoefer, L. Sue Beard, K. Luke Martin, and Nathan Blythe
371

Mormon Mountains
18. Integration of tectonic, sedimentary, and geohydrologic processes leading to a small-scale extension model for the Mormon Mountains area north of Lake Mead, Lincoln County, Nevada
R. Ernest Anderson, Tracey J. Felger, S.F. Diehl, W.R. Page, and J.B. Workman
395
19. Fluid flow, solution collapse, and massive dissolution at detachment faults, Mormon Mountains, Nevada
S.F. Diehl, R. Ernest Anderson, and J.D. Humphrey
427