Allosaurus Posted July 9, 2019 Share Posted July 9, 2019 I received a handful of shark teeth from an older local gentleman's collection who told me they were from Baja near the Sea of Cortes between Santa Barbara and Lorentz. I assume they are great white teeth, but I'm hoping for a better geological context if possible (age and formation/group ideally, even if just suspected). I've done some research, but haven't turned up much. I saw a reference to the El Cien Fm, but am hoping for some input from others who have far greater knowledge than I do. Along with the teeth came a small chunk of bone that also came from around the same area. Input on what it is or might have come from would also be appreciated. The largest tooth is 2 and 6/16ths in and the smallest is 2 1/16th in. The bone is 3 3/16ths in long and 1 2/16ths in wide. Link to comment Share on other sites More sharing options...
Natalie81 Posted July 9, 2019 Share Posted July 9, 2019 Are there serrations on the teeth? I think Carcharadon hastalis. The bone looks older, cretaceous? Link to comment Share on other sites More sharing options...
caldigger Posted July 9, 2019 Share Posted July 9, 2019 I can see there are very worn serrations. These do look like GW teeth. The bone is pretty nondescript, (maybe a section of rib ), not sure you are going to get much further on an ID for that. 2 1 Link to comment Share on other sites More sharing options...
Allosaurus Posted July 9, 2019 Author Share Posted July 9, 2019 All teeth do have serrations, though most are pretty worn. Link to comment Share on other sites More sharing options...
Praefectus Posted July 9, 2019 Share Posted July 9, 2019 +1 for Great White The El Cien formation is Oligocene-Miocene in age. The transition of the broad-form Cosmopolitodus hastalis to the great white Carcharodon carcharias occurred in the late Miocene. The teeth have worn serrations which point to great whites. 3 Link to comment Share on other sites More sharing options...
Allosaurus Posted July 10, 2019 Author Share Posted July 10, 2019 Hmmm, does anyone have a geologic map of Baja which shows specific formations? I've only been able to find maps showing general provinces so far. Link to comment Share on other sites More sharing options...
Darwin and Wallace Posted July 16, 2023 Share Posted July 16, 2023 I too have been trying to find the specific formation that these Baja teeth come from. Anyone know? Link to comment Share on other sites More sharing options...
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