Rock 366 : Day 7 : Folded Phyllite

Rock3660016

Day 7 : Alternating sand and mud layers in a phyllite from the Late Devonian Tredern Shale Fm. of Tintagel, Cornwall. The sandy layers develop more rounded fold profiles where as mud dominated parts show more angular folding. The cleavage development is quite variable. Keele Collection.

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~ by hypocentre on January 7, 2012.

 
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