Rhyolite tuff |
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Rhyolite tuffThis sample of rhyolite tuff (a volcanic breccia) consists of light-colored volcanic fragment embedded in a welded ash bed (the darker red matrix). This sample is from Tertiary-age volcanic deposits in the Cady Mountains, Mojave Desert region, California. |
| https://gotbooks.miracosta.edu/rocks/igneous/41.html | 2/2/2021 |