brireine Posted July 12, 2016 Share Posted July 12, 2016 Found in Guernsey, Wyoming area. Shake rock. About 1 inch long. If you notice, in the rock within the fossil has small line imprints. Assuming a crayfish, but is incomplete. Also on the same chunk of rock, a small (not even a centimeter) fossil that appears to have rings. Possible shell? Rock has tiny fragments of same red fossil scattered on it. Link to post Share on other sites
fossilized6s Posted July 12, 2016 Share Posted July 12, 2016 welcome. your second picture does appear to be a bivalve. I'm stumped on your first item. Link to post Share on other sites
jpc Posted July 12, 2016 Share Posted July 12, 2016 Hi, and welcome from Casper. The second one is a brachiopod, which is similar to bivalve. Do a google image search for brachiopod. Don't look for red images, but rather the shape. the red color is pretty unusual and fun. The 'crayfish' is possibly a section through a crinoid column. Tough to tell. If you ever get to Casper, feel free to bring these by the Tate Museum and I will have a look in person, which is usually much better than photos. (Unless of course I am out and about). 1 Link to post Share on other sites
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