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[noun out-krop; verb out-krop] /noun ˈaʊtˌkrɒp; verb ˌaʊtˈkrɒp/
  1. a cropping out, as of a stratum or vein at the surface of the earth.
  2. the exposed portion of such a stratum or vein.
something that emerges suddenly or violently in the manner of an outcrop; outbreak:
an outcrop of student demonstrations.
verb (used without object), outcropped, outcropping.
to crop out, as strata.
Origin of outcrop
1760-70; noun use of verb phrase crop out Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for outcrop
Historical Examples
  • It has a northwest exposure and is very near the top of the outcrop.

  • Somewhere in here began an outcrop of rock running east for miles.

    The Flaming Jewel Robert W. Chambers
  • At the upper edge of the hill was an outcrop of stratified rock.

    Rambles with John Burroughs Robert John De Loach
  • In my belief, simply an outcrop of sincerity—of fidelity to mood, to impression, to self.

    Another Sheaf John Galsworthy
  • The outcrop occurs at a height of four hundred feet above the river; and there is a well-marked stratification.

    The Long Labrador Trail Dillon Wallace
  • At this point an effort would be made against the outcrop of his thoughts.

    Somehow Good William de Morgan
  • The outcrop of the Gault is marked by a line of springs on all sides of the Southern Downs.

  • This outcrop is oxidized, and being free, is easily amalgamated with mercury.

    An African Adventure Isaac F. Marcosson
  • The favorable feature is the outcrop at so many points in a northeast and southwest line of what seems to be the same vein.

    Two Years in Oregon Wallis Nash
  • This line runs seawards to the east and its strength is shown in its outcrop.

British Dictionary definitions for outcrop


noun (ˈaʊtˌkrɒp)
part of a rock formation or mineral vein that appears at the surface of the earth
an emergence; appearance
verb (intransitive) (ˌaʊtˈkrɒp) -crops, -cropping, -cropped
(of rock strata, mineral veins, etc) to protrude through the surface of the earth
another word for crop out
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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Word Origin and History for outcrop

1805, in geology, "exposure of rocks at the surface," from out + crop (n.) in its sense of "sprout, head."

Online Etymology Dictionary, © 2010 Douglas Harper
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outcrop in Science
An area of visible bedrock that is not covered with soil.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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