upthrow

American  

[uhp-throh, uhp-throh] / ˈʌpˌθroʊ, ʌpˈθroʊ /

noun

1. an upheaval, as of the earth's surface.

2. Geology. an upward displacement of rock on one side of a fault.

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verb (used with object)

upthrew, upthrown, upthrowing

1. to throw or cast up or upward.

upthrow British  

/ ˈʌpˌθrəʊ /

noun

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

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Etymology

Origin of upthrow

First recorded in 1590–1600; up- + throw

Example Sentences

The other side of the semicircle was occupied by the upthrow of a low rise blocking off an horizon at its nearest point but a few hundred yards away.

From The Land of Footprints by White, Stewart Edward

There has also been a certain amount of upthrow owing to the hydrostatic pressure.

From The Birth-Time of the World and Other Scientific Essays by Joly, John

The upthrow is uniformly on the eastern side of the fault.

From A Study of Recent Earthquakes by Davison, Charles

For the next half-mile, the river keeps to the upthrow side of the fault, the scarp of which blocks the tributary streams from the west, forming a number of small pools.

From A Study of Recent Earthquakes by Davison, Charles

The pool is simply due to the reversal of the natural slope of the river-bed, caused by the formation of a roll or undulation in the ground on the upthrow side of the fault.

From A Study of Recent Earthquakes by Davison, Charles

Related Words

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• ascent
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