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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.

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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