Neogene structural and volcanic geology of the Gold Mountain-Slate Ridge area, Esmeralda County, Nevada
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Authors
Worthington, Joseph E
Issue Date
1992
Type
Thesis
Language
en_US
Keywords
Middle Miocene Ash-flow , Late Miocene Ash-flow , Precambrian Sedimentary Rocks , Cambrian Sedimentary Rocks , Mesozoic Granite , Gold Mountain-slate Ridge Area , Ash-flow Sheets , Fault Offsets , Block Tilting , Angular Conformities , Conglomerate , Fanglomerate , Neogene Section , Bullfrog Hills , Furnace Creek Fault Zone , Magnitude , Walker Lane Belt , Mackay Theses and Dissertations Grant Collection
Alternative Title
Abstract
A sequence of eight middle to late Miocene ash-flow sheets overlie late Precambrian and Cambrian sedimentary rocks and Mesozoic granite in the Gold Mountain-Slate Ridge area. Four of the older ash-flow sheets are newly recognized. The area has undergone extension since at least 17 Ma based upon fault offsets, block tilting, the presence of angular unconformities, and units of conglomerate and fanglomerate within the Neogene section. North-south striking normal faults were active about 15-14 Ma; north to northwest-directed extension, coeval with normal faulting in the Bullfrog Hills and movement on the right-lateral Furnace Creek fault zone, occurred mainly between about 11.5 and 7.5 Ma; and uplift of mountain ranges after 7.5 Ma produced the present topography. Extension in the Gold Mountain- Slate Ridge area is comparable in timing, direction, and style, but not magnitude, to that in other areas in the Walker Lane belt.
Description
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Citation
Publisher
University of Nevada, Reno
License
In Copyright(All Rights Reserved)