minnbuckeye Posted December 15, 2018 Share Posted December 15, 2018 I need help with another specimen that popped out of the Ordovician matrix I was busting up last week. I have NO clue as to what this is, or if it is even a fossil. I have split literally a ton of matrix on this roadcut and have not seen this before: Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted December 15, 2018 Share Posted December 15, 2018 Looks organic to me. But not sure what. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
piranha Posted December 15, 2018 Share Posted December 15, 2018 Trilobite, probably a cheirurid spine. 5 Link to comment Share on other sites More sharing options...
Herb Posted December 15, 2018 Share Posted December 15, 2018 trilo bit 1 "Absence of evidence is not evidence of absence"_ Carl Sagen No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go. " I think, therefore I collect fossils." _ Me "When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes "can't we all just get along?" Jack Nicholson from Mars Attacks Link to comment Share on other sites More sharing options...
Johannes Posted December 15, 2018 Share Posted December 15, 2018 I don't think it has to be a trilobite part. Maybe a Byronia? Can you post some detailed pictures? Link to comment Share on other sites More sharing options...
minnbuckeye Posted December 15, 2018 Author Share Posted December 15, 2018 @Johannes, I looked up Byronia and it seems like it was a land plant, impossible in my neck of the woods, Ordovician sea life. Could you explain it's possibility? I zoomed in on this specimen, so the picture is as good as I can take. Mike Link to comment Share on other sites More sharing options...
Johannes Posted December 15, 2018 Share Posted December 15, 2018 As far as I know is Bryonia (with an age of upper Cambrian to Ordovician) at least assigned to the Scyphozoa (?), not to plants (and I guess for sure not to vascular land plants). But maybe I'm wrong and you have a source for validation of Upper Cambrian early land plants, I would really like to read about them. Can you post the book/paper/reference? In the picture I see well preserved high Mg brachiopod shells, and recystallized (low Mg calcite/aragonite) shell fragments. Some sparitic material is around the darker material, which might be an (inner?) organophosphatic coating of a calcified tube (more likey than a carbon one). There are some groups, including some tracefossils with such an inner lining, and some with organophosphatic shells. I have never seen something similar from ordivician carbonates in this sedimentological facies, belonging to trilobites... For any interpretation better pictures should show some structures, without them determination is like sticking in the fog. Link to comment Share on other sites More sharing options...
FossilDAWG Posted December 15, 2018 Share Posted December 15, 2018 Hard to imagine how you would take a better photo, the one you provided is fine. I agree with the certain spine suggestion. Don Link to comment Share on other sites More sharing options...
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