Bone Daddy Posted July 19, 2019 Share Posted July 19, 2019 This came in a big box of mixed fossils. This is an orphan without a label or bag. It looks interesting, like a cross-section of something in the rock matrix. The object is circular in profile and cone or tooth shaped. There appears to be more than one of them, but the other is still partially obscured by matrix. Is this a mineralized fossil of some sort, or is this just a strange geological specimen that got mixed in? Could this be some kind of stromatolite? I wish I had some locality info on it, but I don't. Any help would be appreciated. Link to comment Share on other sites More sharing options...
Rockwood Posted July 19, 2019 Share Posted July 19, 2019 Could be nautiloid with a large siphuncle. Link to comment Share on other sites More sharing options...
abyssunder Posted July 19, 2019 Share Posted July 19, 2019 I think, the geological term might be excluded, considering it's not something like a cone-in-cone structure or similar. Diagenetical processes may show their representatives and could be against us, of course. My first thought was a rostral segment of a large belemnoid including the phragmocone, which was exposed to a hard geological transverse stress. I could be wrong, so please wait other opinions. 2 " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
Bone Daddy Posted July 19, 2019 Author Share Posted July 19, 2019 It's very curious. Somebody obviously cut it, which makes me wonder where the other half is (it's not here). The shape of the inclusion is suggestive (to me) of being biological - like a belemnite or something. I recall seeing fossils shaped in this manner, but the composition seems entirely crystalline in nature, which is odd to me. Link to comment Share on other sites More sharing options...
Rockwood Posted July 20, 2019 Share Posted July 20, 2019 Could be metamorphosed. Link to comment Share on other sites More sharing options...
Bone Daddy Posted July 20, 2019 Author Share Posted July 20, 2019 The consensus in another group seems to be belemnite rostrum. After doing some more searching around, I think this mystery is solved. Link to comment Share on other sites More sharing options...
Pagurus Posted July 20, 2019 Share Posted July 20, 2019 20 hours ago, abyssunder said: My first thought was a rostral segment of a large belemnoid including the phragmocone Makes sense to me. Start the day with a smile and get it over with. Link to comment Share on other sites More sharing options...
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