a reverse fault in which the rocks on the upper surface of a fault plane have moved over the rocks on the lower surface
Compare underthrust
WordReference Random House Unabridged Dictionary of American English © 2025
o•ver•thrust
(ō′vər thrust′),USA pronunciation n. [Geol.]
- Geologya thrust fault with a low dip and a large slip.
- Geologya thrust fault in which the hanging wall was the one that moved (opposed to underthrust).
- over- + thrust 1880–85
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'overthrust' also found in these entries (note: many are not synonyms or translations):