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isopach

noun
iso·​pach | \ ˈī-sə-ˌpak How to pronounce isopach (audio) \

Definition of isopach

: an isoline that connects points of equal thickness of a geological stratum formation or group of formations

First Known Use of isopach

circa 1918, in the meaning defined above

History and Etymology for isopach

is- + -pach (from Greek pachys thick) — more at pachyderm

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