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underthrust

[uhn-der-thruhst] /ˈʌn dərˌθrʌst/
noun, Geology
1.
a thrust fault in which the footwall moved and the hanging wall did not (opposed to overthrust).
Origin
1890-1895
1890-95; under- + thrust
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for underthrust
  • The shovel at lower right indicates the location of underthrust fault in the alluvium.
  • These fractures developed into faults that may have accommodated strain caused by the high topography of the underthrust ridge.
British Dictionary definitions for underthrust

underthrust

/ˈʌndəˌθrʌst/
noun
1.
(geology) a reverse fault in which the rocks on the lower surface of a fault plane have moved under the relatively static rocks on the upper surface Compare overthrust
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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