Geology and hydrothermal alteration of a portion of the eastern Excelsior Mountains, Mineral County, Nevada
Geological Sciences & Engineering
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The eastern Excelsior Mountains are underlain by Permian, Triassic and Cretaceous volcaniclastic sedimentary rocks and porphyry stocks that are unconformably overlain by Tertiary ash-flow tuff, andesite lava flows, and laharic breccias. Additionally, various forms of alteration have been observed and studied.
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hypabyssal porphyry dikes
Mono-Excelsior Structural Zone