A Conversation for Rocks, Stones and Pebbles
Sorry to be perdantic but...
Don Malvado, so bitter my cat won't even lick me Started conversation May 15, 2002
Quartzite is metamorphic
Quartz, Diamond and gypsim are minerals
Ebonite is sedimentry
oil strata is shale
I have doupts that coal is a rock
And there are all sorts of wierd variations on a theme that show up under all 3 sorts of rock that I don't want to go into right now
Sorry to be perdantic but...
Laura Posted Jan 29, 2003
Coal is a rock, a nonclastic organic sedimentary rock for that matter. Shale itself isn't really a rock. It is more a term used to describe fine-grained clastic sedimentary rocks that cleave into sheets. 
love geology.
Sorry to be perdantic but...
Don Malvado, so bitter my cat won't even lick me Posted Jan 29, 2003
well, I'd call certain rocks shale at any rate
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Sorry to be perdantic but...
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