ar·​kose | \ ˈär-ˌkōs How to pronounce arkose (audio) , -ˌkōz \

Definition of arkose

: a sandstone characterized by feldspar fragments that is derived from granite or gneiss which has disintegrated rapidly

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Other Words from arkose

arkosic \ (ˌ)är-​ˈkō-​sik How to pronounce arkose (audio) , -​zik \ adjective

Examples of arkose in a Sentence

Recent Examples on the Web Its heavy concentration of feldspar grains — known as arkose — means the rock is inevitably prone to chemical decay. Washington Post, 2 Apr. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'arkose.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of arkose

1829, in the meaning defined above

History and Etymology for arkose


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Dictionary Entries Near arkose

ark of the law


ark shell

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Cite this Entry

“Arkose.” Dictionary, Merriam-Webster, Accessed 24 Oct. 2021.

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