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isopach

American  
[ahy-suh-pak] / ˈaɪ səˌpæk /

noun

Geology.

  1. a line drawn on a map connecting all points of equal thickness of a particular geologic formation.

isopach British  
/ ˈaɪsəʊˌpæk, ˌaɪsəʊˈpækaɪt /

noun

  1. geology a line on a map connecting points below which a particular rock stratum has the same thickness

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of isopach

1915–20; iso- + -pach < Greek páchos thickness

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.