Slickensides |
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 SlickensidesThis surface displays oriented scratch marks from slippage along a faulted surface. A thin layer of quartz that formed in a fault fracture zone display offset motion (with chattermarks) cause by reactivation of the fault at a later date. |
| https://gotbooks.miracosta.edu/rocks/metamorphic/23.html | 2/2/2021 |