claystone

British

/ ˈkleɪˌstəʊn /

noun

a compact very fine-grained rock consisting of consolidated clay particles

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

claystone Scientific

/ klā′stōn′ /

A fine-grained, dark gray to pink sedimentary rock consisting primarily of compacted and hardened clay. Claystone is similar to shale but without laminations.

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claystone

The newly described fossils of C. praecursor were found in calcareous claystone concretions in the Tesnus Formation of the Marathon Uplift in western Texas.

From Science Daily ● Aug. 27, 2026

The properties of clay and claystone crucially depend on how the tiny sediment particles are orientated.

From Science Daily ● Dec. 2, 2024

Employing cutting-edge techniques like Rock Eval Pyrolysis, they deciphered the organic richness of different types of rock, including shale, claystone, sandstone, and siltstone.

From Science Daily ● May 7, 2024

Fine-grained rocks include mudstone, shale, siltstone, and claystone.

From Textbooks ● Jan. 1, 2017

Many of the hills composed of claystone are neatly devoid of vegetation; their surface being bare and smooth, and of a red or black colour.

From The Mirror of Literature, Amusement, and Instruction Volume 13, No. 359, March 7, 1829 by Various

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023