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 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

Rocks exclusively composed of silt or clay sediment, are called siltstone or claystone, respectively.

From Textbooks ● Jan. 1, 2017

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

From Textbooks ● Jan. 1, 2017

As far as the Pass of Jaula, the claystone conglomerate formation, in most parts highly porphyritic, and crossed by numerous dikes of greenstone porphyry, attains a great thickness: there is also much intrusive porphyry.

From Geological Observations on South America by Darwin, Charles

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