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.

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

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

This pitchstone, as well as some purple claystone porphyry, certainly flowed in the form of streams.

From Geological Observations on South America by Charles Darwin

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