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siltstone

[silt-stohn] /ˈsɪltˌstoʊn/
noun, Petrography
1.
a very fine-grained sandstone, mainly consolidated silt.
Origin
1925-1930
1925-30; silt + stone
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for silt-stone

siltstone

/ˈsɪltˌstəʊn/
noun
1.
a variety of fine sandstone formed from consolidated silt
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
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silt-stone in Science
siltstone
  (sĭlt'stōn')   
A fine-grained sedimentary rock consisting primarily of compacted and hardened silt. Siltstones are similar to shale but without laminations. They vary in color from black or gray to brown or red.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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