Moraines and Tertiary Volcanics, West Walker River, California
Quaternary glacial moraines and Miocene-Pliocene volcanic rocks exposed along West Walker River. The West Walker River drainage basin includes an extensive area north of Yosemite National Park and contained some of the largest valley glaciers in the eastern Sierra Nevada. The Sweetwater Mountains (background) in Nevada are composed of Tertiary volcanic and shallow intrusive rocks.
This photograph was published by the California Board of Registration for Geologists and Geophysicists in their Winter 1999 Newsletter.
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