up throw

upthrow

[n. uhp-throh; v. uhp-throh]
noun
1.
an upheaval, as of the earth's surface.
2.
Geology. an upward displacement of rock on one side of a fault.
verb (used with object), upthrew, upthrown, upthrowing.
3.
to throw or cast up or upward.

Origin:
1590–1600; up- + throw

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
upthrow (ˈʌpˌθrəʊ)
 
n
1.  geology the upward movement of rocks on one side of a fault plane relative to rocks on the other side
2.  rare an upward thrust or throw; upheaval

Collins English Dictionary - Complete & Unabridged 10th Edition
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