Sketch Posted September 4, 2021 Share Posted September 4, 2021 Quote Link to comment Share on other sites More sharing options...
Morlock Posted September 4, 2021 Share Posted September 4, 2021 Crinoid stem cross sections. Quote Link to comment Share on other sites More sharing options...
Bedrock Bob Posted September 4, 2021 Share Posted September 4, 2021 Its hematite. Rub it on your toilet tank lid. Quote Link to comment Share on other sites More sharing options...
Sketch Posted September 5, 2021 Author Share Posted September 5, 2021 19 hours ago, Morlock said: Crinoid stem cross sections. So a fossil? Quote Link to comment Share on other sites More sharing options...
Sketch Posted September 5, 2021 Author Share Posted September 5, 2021 (edited) 18 hours ago, Bedrock Bob said: Its hematite. Rub it on your toilet tank lid. No I was talking about shell like object stuck in that rock. Edited September 5, 2021 by Sketch Quote Link to comment Share on other sites More sharing options...
4meter Posted September 6, 2021 Share Posted September 6, 2021 The fossil does not have the five fold symmetry of a Crinoid, Blastoid or other Echinoderms. Might be a sponge of corral of some sort. Based on the fact that both the big and little fossils have a hole in the middle, that was filled with matrix, and inner/outer walls with pours, I would call these sponges. Quote Link to comment Share on other sites More sharing options...
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