noun Geology.
a thrust fault with a low dip and a large slip.
a thrust fault in which the hanging wall was the one that moved (opposed to underthrust ).

1880–85; over- + thrust

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World English Dictionary
overthrust (ˈəʊvəˌθrʌst)
geology Compare underthrust a reverse fault in which the rocks on the upper surface of a fault plane have moved over the rocks on the lower surface

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Example sentences
Some of the fault variations seen in the area include dip-slip, strike-slip, and overthrust faults.
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