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Post by tkrueger3 on Nov 4, 2010 15:30:18 GMT -5
I'm thinking this is crinoidal limestone. Don't know where it was found, but I suspect somewhere in Texas (that's a lot of "somewhere"). Looks to be around 6 to 6.5 Moh's, and is extremely fractured - just look at it sideways and it falls apart. I had a big ol rock of this and it made a gazillion slabs, and almost all of them fell apart in the kitty litter. Thanks for any help! Tom
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Post by jakesrocks on Nov 4, 2010 15:58:34 GMT -5
Looks more like puddingstone to me. A type of conglomerate. Much of it is loosely cemented, and will fall apart.
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Post by tkrueger3 on Nov 4, 2010 16:09:26 GMT -5
OK, thanks - I thought maybe puddingstone, but then I found a picture of some crinoidal limestone that looked very much like this, so I changed my mind. So I'll just call it puddingstone - some of it might make a cab or 2, but mostly not big enough pieces.
Thanks,
Tom
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Post by johnjsgems on Nov 4, 2010 17:11:14 GMT -5
Mostly the "stems"of crinoids are preserved so you would have circular fossils if crinoidal.
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Post by tkrueger3 on Nov 4, 2010 20:56:10 GMT -5
Thanks, John. Maybe oneathesedays I'll actually learn something about rocks!
Tom
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Post by jakesrocks on Nov 4, 2010 21:25:31 GMT -5
Tom, in this hobby you never stop learning. The day you stop learning, is the day they send for the coroner. lol
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