EXAMPLES | WORD ORIGIN noun a granular sedimentary rock composed of quartz and feldspar or mica; a feldspathic sandstone. Origin of arkose
Borrowed into English from
French around 1830–40 Related forms ar·ko·sic, adjective
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for arkose Historical Examples of arkose British Dictionary definitions for arkose noun a sandstone consisting of grains of feldspar and quartz cemented by a mixture of quartz and clay minerals Word Origin for arkose
C19: from French
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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A usually pinkish or red sandstone consisting primarily of quartz and feldspar. Arkose usually forms as the result of the rapid disintegration of granite in areas of vigorous erosion. Its grains are usually angular and poorly sorted (mixed randomly in differing sizes).
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