Arkose sandstone |
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Arkosic sandstoneLithogenous sedimentary rock.Arkose is a medium- to coarse-grained sandstone that is at least 25 percent feldspar. Arkose is associated with ancient alluvial sediments derived from granitic mountain ranges. This sample is from Miocene-age alluvial fan deposits of the Pliocene Borrego Formation, Anza Borrego desert area, California. |
| https://gotbooks.miracosta.edu/rocks/sedimentary/13.html | 2/2/2021 |