follow Dictionary.com

It’s about time. We are now on Instagram!

clay stone

noun, Geology
1.
Also, claystone.
Origin
1770-1780
1770-80
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
British Dictionary definitions for claystone

claystone

/ˈkleɪˌstəʊn/
noun
1.
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
Cite This Source
claystone in Science
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 © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Encyclopedia Article for claystone

hardened clay. Some geologists further restrict the term to a sedimentary rock that is composed primarily of clay-sized particles (less than 1256 millimetre in diameter) and is not laminated or easily split into thin layers; such rocks that show cleavage roughly parallel to the bedding plane often are classed as clay shales. Claystones that are massive and blocky are sometimes called mudstones, but some geologists class as mudstones partly hardened muds that slake when wetted, reserving the term claystone for fully hardened material.

Learn more about claystone with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source

Word of the Day

Difficulty index for clay stone

Few English speakers likely know this word

Word Value for claystone

0
0
Scrabble Words With Friends

Nearby words for claystone