sandstone

[sand-stohn]
noun
a common sedimentary rock consisting of sand, usually quartz, cemented together by various substances, as silica, calcium carbonate, iron oxide, or clay.

Origin:
1660–70; sand + stone

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
sandstone (ˈsændˌstəʊn)
 
n
any of a group of common sedimentary rocks consisting of sand grains consolidated with such materials as quartz, haematite, and clay minerals: used widely in building

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
sandstone   (sānd'stōn')  Pronunciation Key 
A medium-grained sedimentary rock consisting of fine to coarse sand-sized grains that have been either compacted or cemented together by a material such as silica, iron oxide, or calcium carbonate. Although sandstone usually consists primarily of quartz, it can also consist of other minerals, and it can vary in color from yellow or red to gray or brown.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

sandstone definition


A sedimentary rock formed of sand-sized grains that have been either compacted or cemented together. Altough sandstone usually consists primarily of quartz, it can also consist of other minerals.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
Having entered the harbour, it appears fine and spacious, with cliff-formed
  shores of horizontally stratified sandstone.
The bluff's golden sandstone has been worn down by water and wind into stunning
  sculptures and patterns.
Farther inland, every sandstone and limestone escarpment is the color of bone.
He weaves his way through all the cars, big eight-grand jobs, and walks up
  mossy sandstone steps to the door.
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