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Found 3 results

  1. Hi everyone! I think I'll skip the fluff and just get to my points on why I think that's what this one is. ID as Ceratopsian horn: The piece is from Powder River County, Montana. It measures 22.2 x 10 x 8.3 cm. The last two pics show the circular cross section and then blood grooves. The Bite Marks and comparison to a published specimen: Aside from a huge crescent shaped gouge on the distal end I have counted several individual scour marks. A similar specimen has been documented with the same huge crescent shaped gouge with individual scours in almost the exact same places. Here is a quick overview of the individual marks on this specimen and a comparison to the published specimen. I will go into each mark in detail. First is the published specimen as well as the website I saw it mentioned and the original article. My specimen: Main Scour Mark A: A Large Tooth from Tyrannosaurus rex (CH 7.5 cm) fits almost perfectly into MSMA. The mesial carina aligns perfectly with the serration mark. Smaller teeth would not fit. The tooth was found in Garfield County, Montana. Main Scour Mark B: MSMB with the tip of another large T-Rex tooth fit in. The mark measures 10.28 mm long and 7 mm wide. Like MSMA, it was created by the mesial edge of the tooth. The teeth used to fill each mark were photo'd in their approximate position showing them as roughly parallel. The marks are 6.9 cm apart. Both are in almost the exact same position and distance apart as the published specimen mentioned earlier. Secondary Scour Mark A: Very close to, but at an angle to MSMA. There is and area near the scour which might be a continuation though I am not sure. Without the questionable area it measures 13 mm long and 6.2 mm across. Secondary Scour Mark B: This scour mark isn't as deep as the others but is longer at 24.8 mm. Another Scour mark was documented in this are on the published specimen but was at a different angle. Identification of the Bite Marks as Tyrannosaurus rex: In the Hell Creek Formation of Powder River County three large species of Theropod dinosaur are known, Dakotaraptor steini, Nanotyrannus lancensis, and Tyrannosaurus rex. Given the size of tooth required to make MSMA, the best preserved of the scour marks in my opinion, I believe both Dakotaraptor and Nanotyrannus can be ruled out. The fit of a large Tyrannosaurus rex tooth in both size and shape into MSMA also provides evidence even beyond process of elimination of other species. What's more, the existence of a remarkably similar fossil of a Ceratopsian horn with both very similar damage morphology of the distal end and scour placement would indicate consistency in the interaction between Tyrannosaurus and large Ceratopsians. Okay, I had my fun playing paleontologist. So what do you all think? Any insight is greatly appreciated as always!
  2. Shellseeker

    Peace River Hunting.. May 28th

    A day with interesting finds. The water level has dropped from Friday, but the current is faster. Still Pea Soup. The Peace river is noted for being a mix of Miocene to Modern...on some days more then others. Out primary shark tooth finds were Hemipristis and G. mayumbrensis, both Miocene species. Have found Dugong verts, Rhino teeth fragments, small horse fragments, but also these... A silicified shell.. I frequently guess wrong... Oyster ? Thi 2nd set of photos is the UF MNH Ostrea_compressirostra-UF120412, a much larger Pliocene shell. Also found what is likely a deer tine. Look at those bite marks...must have been hungry. Finally, a fossil that looks like an Equus Navicular,, but slightly different. Note the fine grained detail.. Did not face much water erosion... Enjoy, Jack
  3. Toast123

    Bite mark?

    Is this a bite mark or natural wear? It’s a cervical vertebra
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