last edited: 8/3/02 number of photos: 17
Phyllite is metamorphosed shale. It is a foliated
metamorphic rock, often with a silky sheen due to
the presence of tiny mica crystals. The cleavage
surface of phyllite is not flat like slate, but is
phyllite: A B C D E F
phyllite, gray: A B
phyllite from Santa Catalina Mountains, Arizona:
A B C D E F G
ottrelite in phyllite: A B
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Just credit photos to R.Weller/Cochise College.