slickenside


slick·en·side

noun \ˈsli-kən-ˌsīd\

Definition of SLICKENSIDE

:  a smooth often striated surface produced on rock by movement along a fault or a subsidiary fracture —usually used in plural

Origin of SLICKENSIDE

English dialect slicken smooth (from 2slick) + English side
First Known Use: 1822

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