SteveHolmes
fully equipped rock polisher
Member since July 2009
Posts: 1,900
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Post by SteveHolmes on Oct 22, 2009 22:06:25 GMT -5
I think this might be OJ but I could be wrong. The thing that is stumping me is the outer look. I'm no OJ expert but I don't know if I've seen OJ like this before. This one is a real stumper. This was found in Henry Mountains very recently. My friend (Bill Branson's son) found this stuff weathering out of the Morrison formation. Bill has never seen anything like this and he's explored ALOT of the Morrison formation from Utah and into Colorado. He's even stumped! Which is very hard to believe. I wished I would have had the camera to take pics of the nodules....but I didn't have it. To me it looks sort of like a Rhyolite type material...but I don't know. Any help would be APPRECIATED!!! Thanks. Steve
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Post by Toad on Oct 22, 2009 22:10:46 GMT -5
First one doesn't look like any OJ I've seen. But can't tell you what it is.
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Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,466
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Post by Sabre52 on Oct 22, 2009 23:41:22 GMT -5
Colors are right for Kabamby type OJ but the patterns look more like California stuff. I do have a green and yellow example from the Morgan Hill area and have seen some from Pope Valley too. That's a stumper. I'd call the second orbicular rhyolite too.....Mel
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joemojave
starting to spend too much on rocks
Member since October 2009
Posts: 133
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Post by joemojave on Oct 23, 2009 0:31:35 GMT -5
If the rock is not well known in the area, try taking it to a local natural history museum and a state/county geologist will be happy to ID it for you. At least this is my experiance.
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rollingstone
starting to spend too much on rocks
Member since July 2009
Posts: 236
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Post by rollingstone on Nov 22, 2009 4:14:42 GMT -5
Is that first one calcite-soft?... it looks kind of like flowering-tube onyx to me (not really onyx, but a calcite).
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