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overthrust belt

American  

noun

(sometimes initial capital letters)

  1. an elongate area in which thick rock layers have been pushed over one another by compressional forces within the earth's crust.

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

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