last edited: 5/15/13 number of photos: 12
Slate is metamorphosed shale. It is distinguished from
shale by breaking into very flat, thin sheets. When struck
lightly with a blunt object, slate produces a ringing sound
like a ceramic, whereas shale produces a dull thud.
slate: A B C D*
slate, gray: A B
slate, red: A B
tunnel cut through slate
slate tiles: A B C
Photos are copyright free for
non-commercial educational uses.
Just credit photos to R.Weller/Cochise College.