A form of thrust fault from beneath a hanging wall of rock(noun)
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Use "overthrust" in a sentence
"The overthrust above which they now passed had occurred at least a million years previous to their arrival on this planet."
""Well, they'll sweat it out on those slopes this morning?" she added, looking at the foothills that folded higher and higher until the overthrust mountains dominated the skyline."
"Hubbert also explained the puzzling displacement of enormous blocks of material, known to geologists as overthrust faults, as a consequence of fluid pressure between such blocks and underlying materials."