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slickenside

American  
[slik-uhn-sahyd] / ˈslɪk ənˌsaɪd /

noun

Geology.

  1. a rock surface that has become more or less polished and striated by slippage along a fault plane.

slickenside British  
/ ˈslɪkənˌsaɪd /

noun

  1. a rock surface with a polished appearance and fine parallel scratches caused by abrasion during fault displacement

"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
slickenside Scientific  
/ slĭk′ən-sīd′ /

  1. A polished, striated rock surface formed by one rock mass sliding over another in a fault plane.

Etymology

Origin of slickenside

First recorded in 1760–70; slick + -en 3 + side 1

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.