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[ahy-suh-pak] /ˈaɪ səˌpæk/
noun, Geology
a line drawn on a map connecting all points of equal thickness of a particular geologic formation.
Origin of isopach
1915-20; iso- + -pach < Greek páchos thickness Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for isopach
  • The isopach interval includes all but the uppermost part of the stratigraphic sequence studied during the present investigation.
  • Structure and isopach maps and cross sections were prepared.
  • isopach maps were also generated to represent the different sediment packages overlying the limestone.
  • The oil well and surface data were likewise computer contoured to produce an isopach map of the formation.
  • Areal extent and isopach maps, correlation chart, measured sections.
British Dictionary definitions for isopach


(geology) a line on a map connecting points below which a particular rock stratum has the same thickness
Word Origin
C20: from iso- + Greek pakhus thick, pakhutēs 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
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