bushmanbilly
Cave Dweller
Member since October 2008
Posts: 4,719
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Post by bushmanbilly on Oct 25, 2010 14:05:32 GMT -5
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SteveHolmes
fully equipped rock polisher
Member since July 2009
Posts: 1,900
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Post by SteveHolmes on Oct 25, 2010 14:48:27 GMT -5
Aren't those also known as Gastrolith's?? That's a cool bone...do you think it's Dino?? There are alot of those polished stones out in the Green River, Utah area. I wonder just how many of them are really Gastroliths. Steve
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bushmanbilly
Cave Dweller
Member since October 2008
Posts: 4,719
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Post by bushmanbilly on Oct 25, 2010 16:37:37 GMT -5
Thats the word I was thinking of, just couldn't pull it off the tip of my tung. Yes that is a bone. The bone here is not agatized just petrified. Wish I had my camera with me. I found a large bone. Started to dig it out with my rock pick. Just to much work. I will have to come back in the spring with more tools. By the size of the joint that was exposed, I think its more than 5 feet long.
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Post by rockrookie on Oct 27, 2010 21:01:47 GMT -5
nice finds!! --paul
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Post by johnjsgems on Oct 28, 2010 8:12:58 GMT -5
Steve, I know what you mean. The problem with the Green River area is every little canyon has rounded river rock. The gastroliths will generally have a slight waxy feel. I usually only pick them up in areas with absolutely no river rocks around. You still don't know for certain.
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Post by Woodyrock on Nov 15, 2010 1:51:44 GMT -5
If the stone you think is a gastrolith, and it was not found amongst a dino skeleton, the stone will be highly polished on the outer surfaces, but have little or no polish in pits or crevices. Stream polished rock on the other hand will be more abraded on the outer surface, and polished in the pits and crevices. One other criteria paleotologists look for in an unassociated stone is the suspected gastrolith being of different material than the surrounding material. If you find a 'nest' of rounded polished stones, and all the rock around is not rounded, then you may well have found gastroliths. Moas, a giant recently extinct bird of New Zealand coughed up gizzard stones and picked up new ones, so these 'nests' of gizzard stones are frequently found in sheep pastures away from any rounded stone. Dinos may well have done the same thing. Woody
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Fossilman
Cave Dweller
Member since January 2009
Posts: 20,685
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Post by Fossilman on Jan 15, 2011 14:46:42 GMT -5
I have a handful of those gastrolith's too,found in the Melstone and Glendive areas of Montana.........various sizes and colors............
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franzibear
starting to spend too much on rocks
Let's rock
Member since October 2008
Posts: 139
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Post by franzibear on Feb 13, 2011 21:07:47 GMT -5
Awesome finds! It must be pretty dry there in the winter to get into the badlands!
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