Foliation with slatey cleavage perpendicular to bedding
https://www.youtube.com/watch?v=qiqWBs_qk_YGeology Professor Shawn Wilsey on location with a twisted slate rock unit in Idaho. (8:12 minutes)
https://en.wikipedia.org/wiki/Foliation_(geology)
Foliation with slatey cleavage perpendicular to bedding - Giggity Giggity
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