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 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

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

In Figure 184 the right side has gone down relatively to the left; the right is the side of the downthrow, while the left is the side of the upthrow.

From The Elements of Geology by Norton, William Harmon

Out, traitor!" cried the girl with a quick, scornful upthrow of the chin, "it is the smile that saves you, Louis, lad.

From Patsy by Crockett, S. R. (Samuel Rutherford)

Related Words

• altitude
• ascent
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