Arkose
Arkose (/ˈɑːrkoʊs, -koʊz/) or arkosic sandstone is a detrital sedimentary rock, specifically a type of sandstone containing at least 25% feldspar. Arkosic sand is sand that is similarly rich in feldspar, and thus the potential precursor of arkose.
| Sedimentary rock | |
Arkose with K-feldspar (pinkish-orangish) and quartz (gray) grains | |
| Composition | |
|---|---|
| >25% feldspar |
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