mjstephens Posted March 2, 2023 Share Posted March 2, 2023 Hello Group. I have had this concretion for years, unopened. It fell of a table while outside, during a move. I finished the breakout manually. If memory serves me, It came from the Lake Texoma shoreline during a drought. It looks like pics i found of shell crushers teeth. I didn't want to do anything to it without knowing anything about it. Any help in identification would be greatly appreciated. Thoughts and comments welcome. Please excuse the poor photography. I will get better pics soon. This "stone" almost went in the garden last week. Link to comment Share on other sites More sharing options...
ClearLake Posted March 2, 2023 Share Posted March 2, 2023 Yes, that is certainly a broken concretion. Sometimes they contain fossils, but I'm not seeing anything obvious in yours and certainly not a sharks tooth. Are the last two pictures something different, because those clearly have bivalve and gastropods parts in them, but I don't see how it fits into the concretion. Link to comment Share on other sites More sharing options...
mjstephens Posted March 2, 2023 Author Share Posted March 2, 2023 the last two are unrelated but from the same area. The shark i was thinking it resembled most was Ptychodus mortoni. like this one attached. Link to comment Share on other sites More sharing options...
LSCHNELLE Posted March 3, 2023 Share Posted March 3, 2023 It has a circular shape with a raised top. But I don't see any ridges in the top of the rock. I would say this is some type of iron nodule. Probably a part of the concretion. But, it doesn't look like a fossil. 1 Link to comment Share on other sites More sharing options...
mjstephens Posted March 4, 2023 Author Share Posted March 4, 2023 It is non-ferrous. I thought that at first too. I would like to have it tested, cleaned or identified by someone, or clean it myself if i can without damage. (if it's anything to damage.) I think i see ridges when it's wet and in the bottom of its' concretion, like a mold. I've found 12" Ammonites in this area and countless others over the last 30 years on a waterfront property with cliffs eroding. This is the first time i've seen one of these. Link to comment Share on other sites More sharing options...
ClearLake Posted March 4, 2023 Share Posted March 4, 2023 I see what you are thinking about the Ptychodus, but I only see a very vague similarity (as @LSCHNELLE suggested) and do not believe it is that. What is the size of the round center part of the concretion (photos 1,3 and 4) that you think is the tooth? It looks larger that a Ptychodus tooth would be (max. ~1 inch), but maybe I am mis-judging the size. Link to comment Share on other sites More sharing options...
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