from The Century Dictionary.

  • noun In geology, a type of reversed fault where, as the result of enormous tangential pressure, the rocks on the upper side of the fault have been pushed or thrust for a greater or less distance, with an entire severance of continuity, over the, underlying masses. The line of junction of the dissevered parts in such cases is denominated a thrust-plane.


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  • The part of the thrust-plane over which movement took place must therefore have been about 200 miles long, not less than 50 miles wide, and between 6000 and 7000 square miles in area.

    A Study of Recent Earthquakes


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