Rayminazzi Posted February 17, 2019 Share Posted February 17, 2019 Just got home from a day trip to the corpus Christi area, very tired so might be a bit loopy. Found this on a shoreline sort of near the lighthouse park in Port Aransas, given the environment I don't know if it is actually a fossil that was maybe dredged out of the channel or modern. I think it is a shark centrum but I've never found one before so I could be wrong. Scale was a last minute thing, it's 28 mm long. Around an inch and an eighth. 1 Link to comment Share on other sites More sharing options...
siteseer Posted February 17, 2019 Share Posted February 17, 2019 Yes, that is a shark centrum. The form is said to be of a carcharhiniform shark like a bull or other species of Carcharhinus that frequents that coast. It appears to be modern but then it's hard to say based on a photo. Fossil ones tend to have a ceramic-like quality - easily chipped or broken. Those holes would be on the top and bottom. They are where the cartilaginous neural and hemal arches would connect into the centrum, the centrum being partly calcified so they can endure as fossils - just less often than a tooth. 5 Link to comment Share on other sites More sharing options...
Darktooth Posted February 17, 2019 Share Posted February 17, 2019 Nice find! I like Trilo-butts and I cannot lie. Link to comment Share on other sites More sharing options...
Uncle Siphuncle Posted February 17, 2019 Share Posted February 17, 2019 7.62? Grüße, Daniel A. Wöhr aus Südtexas "To the motivated go the spoils." Link to comment Share on other sites More sharing options...
Rayminazzi Posted February 17, 2019 Author Share Posted February 17, 2019 46 minutes ago, Uncle Siphuncle said: 7.62? 5.7x28, small and stupid fast. Around 2400 fps. 1 Link to comment Share on other sites More sharing options...
Rayminazzi Posted February 17, 2019 Author Share Posted February 17, 2019 6 hours ago, siteseer said: Yes, that is a shark centrum. The form is said to be of a carcharhiniform shark like a bull or other species of Carcharhinus that frequents that coast. It appears to be modern but then it's hard to say based on a photo. Fossil ones tend to have a ceramic-like quality - easily chipped or broken. Those holes would be on the top and bottom. They are where the cartilaginous neural and hemal arches would connect into the centrum, the centrum being partly calcified so they can endure as fossils - just less often than a tooth. Would there be a way to tell if it was fossil, it seams heavier and harder than cartilage. Link to comment Share on other sites More sharing options...
Al Dente Posted February 17, 2019 Share Posted February 17, 2019 It looks modern to me. Shark centra are made of calcified cartilage, denser and harder than plain cartilage. 2 Link to comment Share on other sites More sharing options...
ynot Posted February 17, 2019 Share Posted February 17, 2019 1 hour ago, Rayminazzi said: 5.7x28, Not a good scale reference. Please use a ruler for scale. Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
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