Dictionary.com

clay stone

or claystone

noun Geology.

argillite.

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Origin of clay stone

First recorded in 1770–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for clay stone

  • Why should the schist pendant of the Tappock chamber be all right, if the claystone pendant of Dunbuie be all wrong?

    The Clyde Mystery|Andrew Lang

  • But there was more; close by the stone I noticed (although I think you didn't) a mark in the claystone.

    Chronicles of Martin Hewitt|Arthur Morrison

  • We see them light their claystone pipes, and send forth clouds of blue vapour.

    The Scalp Hunters|Mayne Reid

British Dictionary definitions for clay stone

claystone
/ (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

Scientific definitions for clay stone

claystone
[ 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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.