Dictionary

arkose

noun ar·kose \ˈär-ˌkōs, -ˌkōz\

Definition of ARKOSE

:  a sandstone characterized by feldspar fragments that is derived from granite or gneiss which has disintegrated rapidly
ar·ko·sic \(ˌ)är-ˈkō-sik, -zik\ adjective
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Origin of ARKOSE

French
First Known Use: 1829

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