TiffMarie Posted March 30, 2022 Share Posted March 30, 2022 Hello! Took my boys out looking for fossils for the first time and we have no clue what kind of teeth some of these are. Would love some help! These are from Post Oak Creek in Texas the square is 3.175 cm tall x 3.5cm wide Thanks!! 2 Link to comment Share on other sites More sharing options...
Nanotyrannus35 Posted March 30, 2022 Share Posted March 30, 2022 Not an expert, but I can at least tell you that these are fossil shark teeth. Enthusiastic Fossil Hunter Link to comment Share on other sites More sharing options...
ThePhysicist Posted April 3, 2022 Share Posted April 3, 2022 The long, narrow teeth with ridges on them are "goblin" sharks, Scapanorhynchus sp., they're the most common shark you'll find there: The largest teeth (the two to the right of the ruler) are probably Cretodus. Does the rooted one have this steep face on the root? "Argumentation cannot suffice for the discovery of new work, since the subtlety of Nature is greater many times than the subtlety of argument." - Carl Sagan "I was born not knowing and have had only a little time to change that here and there." - Richard Feynman Collections: Hell Creek Microsite | Hell Creek/Lance | Dinosaurs | Sharks | Squamates | Post Oak Creek | North Sulphur River | Lee Creek | Aguja | Permian | Devonian | Triassic | Harding Sandstone Instagram: @thephysicist_tff Link to comment Share on other sites More sharing options...
TiffMarie Posted April 3, 2022 Author Share Posted April 3, 2022 My son will be very excited to hear about some of his teeth being goblin shark teeth! Here are 2 closer photos of that larger tooth. 1 Link to comment Share on other sites More sharing options...
ThePhysicist Posted April 3, 2022 Share Posted April 3, 2022 That's a very cool shark tooth - it actually looks like an anterior (very front of the jaw) Cretoxyrhina mantelli, the "ginsu" shark! The ginsu is one of my favorites and uncommon to find at Post Oak; it was a large apex predator that fed on everything from mosasaurs, pterosaurs, to dinosaurs. ^https://www.jstor.org/stable/41309622?seq=1&cid=pdf-reference#references_tab_contents 1 2 "Argumentation cannot suffice for the discovery of new work, since the subtlety of Nature is greater many times than the subtlety of argument." - Carl Sagan "I was born not knowing and have had only a little time to change that here and there." - Richard Feynman Collections: Hell Creek Microsite | Hell Creek/Lance | Dinosaurs | Sharks | Squamates | Post Oak Creek | North Sulphur River | Lee Creek | Aguja | Permian | Devonian | Triassic | Harding Sandstone Instagram: @thephysicist_tff Link to comment Share on other sites More sharing options...
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