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I’d like for my Post Oak Creek collection identified (specifically the shark teeth), but I can’t find much information online about the species of shark whose teeth are found here (Post Oak Creek in Sherman, Texas). When I HAVE come across general information about the creek and other peoples findings online, there aren’t any pictures of the teeth or nobody else knows exactly what they have. It’s also hard to tell if I’m grouping them correctly, so I apologize if I’m mixing some species together. The longer teeth have very similar characteristics, but greatly differ in size. And the only teeth that I HAVE been able to identify are the ptychodus teeth (not pictured), but only because they’re so unusual in appearance. Excuse the quality of the images. I don’t feel like setting up my camera right now, but I do plan on taking clearer images once I’ve correctly identified each specimen.
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My husband and I like to go on walks along the wooded dirt trails behind our home. Last winter, we stumbled upon a particular stretch of path. It was constructed using refractory bricks smack dab in the middle of the woods. It wasn’t until recently when we decided to revisit the area. One does not simply stumble upon an old brick path in the middle of the woods. It had to have once led somewhere. We did, in fact, find an old stone well nearby. Across from the well, there’s the foundation of a house that’s nothing but rubble. I also found an A&W Root Beer can amongst the rubble. It was the 1968 to 1995 A&W logo. Most of the bricks were branded, but I could hardly make out the wording. The name Louis was clear as day on quite a few of the smaller fragments, but the more intact bricks had lettering that was harder to read. I managed to find a single brick that wasn’t so weathered. I knelt down to read what was branded on it, but this little coral fragment caught my attention. It was wedged between the bricks in the center of the path, almost as if it were placed there intentionally. I don’t see how else it could have gotten there. After further inspection, the coral (a honeycomb coral) appears to be fused to an unidentifiable species of mollusk. Fossilized oysters and clams are common finds in my area, but this is the first fossilized coral I’ve found. FullSizeRender.MOV
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This is a Cretaceous oyster that I found in Post Oak Creek in Sherman, Texas. The oyster has traces of a yellowish calcite-cemented sandstone found in the upper part of the Arcadia Park Formation of the Eagle Ford Group. "Pediformis" in the name, Ostrea alifera var. pediformis, means foot-shaped or pediform because the oyster looks like a foot or boot. In Hill 1898, the author eliminated the Ostrea alifera Cragin, and Ostrea alifera var. pediformis Cragin names because he considered them to be Ostrea lugubris Conrad. I disagree with Hill's decision because my oyster is larger than most O. lugubris (now Cameleolopha lugubris) and lacks an attachment scar characteristic of O. lugubris. My oyster may be a genus Cameleolopha since both Cameleolopha bellaplicata and Cameleolopha lugubris occur nearby. Unless new information can be found, my oyster should be called: Ostrea alifera variety pediformis Craigin. For more information and drawings of Ostrea alifera and Ostrea alifera variety pediformis Craigin see: Cragin, F. W. 1893. "A Contribution to the Invertebrate Paleontology of the Texas Cretaceous", Austin, Texas, B.C. Jones & Co., State printers. Hill, Robert T. & T. W. Vaughan. 1898. The Lower Cretaceous *Grypheas* of the Texas region. U. S. Geological Survey, Bulletin 151: 139 pp.
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Need help to ID a possible fossil found in Post Oak Creek, Sherman, Tx
ThaGr8WiteDope posted a topic in Fossil ID
My son found this last week while poking around Post Oak Creek in Sherman Tx. The bumps and ridges on the sides are symmetrical, and it has a smooth hollowed out portion. Not sure if it’s part of a fossil or just an odd rock formation. Hoping someone here can help us out. Thanks!!- 3 replies
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From the album: Post Oak Creek
Small "bamboo" shark teeth, about 1 mm tall.-
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From the album: Post Oak Creek
Tiny sawskate oral teeth - less than 1 mm in size.-
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From the album: Post Oak Creek
The shell of a "foram" (test). It looks like a snail or ammonite, but is actually a marine protist (only found in the oceans).-
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From the album: Post Oak Creek
A small "bamboo" shark, just 1 mm tall.-
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From the album: Post Oak Creek
Various denticles from sharks and rays sitting on the face of a dime.-
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From the album: Post Oak Creek
Rhinobatos teeth are so small they make me angry Here you see a dozen guitar fish teeth sitting on the face of a dime! The largest is a bit under 1 mm tall. R. incertus has a pointed crown, R. caseiri has no point.-
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From the album: Post Oak Creek
I'm pretty sure these are S. raphiodon teeth. They are much smaller than S. texanus with a narrow main cusp and finer striations than S. texanus. Compare: http://oceansofkansas.com/sharks/Kansas/shscap3.jpg-
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From the album: Post Oak Creek
I'm fairly certain this is a posterior Cretodus - a shark known for producing Texas-sized teeth! At just 1 mm tall, this may be the smallest Cretodus tooth possible.-
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From the album: Post Oak Creek
The famous "ginsu shark" is a rarer species that can be found here. This is a lateral position; a tooth farther back in the mouth. I've only found a handful and none are complete.-
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From the album: Post Oak Creek
Symphyseal teeth are found in the midline of the shark's jaw. They are usually small and squashed-looking. Since only a few rows produce these teeth, they are much rarer than other positions.-
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From the album: Post Oak Creek
The fossils in the creek can have varying levels of preservation: from the pristine glassy enamel seen at the top, to more river-worn seen below.-
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From the album: Post Oak Creek
These oysters are common in the creek, and support the Turonian age of the fossils.-
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From the album: Post Oak Creek
These oysters are common in the creek, and support the Turonian age of the fossils.-
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From the album: Post Oak Creek
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Sherman, Texas, turning Post Oak Creek into fossil park
Oxytropidoceras posted a topic in Fossil News
Sherman turning Post Oak Creek into fossil park By Lauren Rangel, KXII Channel 22, July 8, 2022 Yours, Paul H. -
Hello! I have yet again grouped up some more fossils that I found in Post Oak Creek that I found interesting and would like to be ID'd. Thank you for the help! (1) very nice tooth (2) shark or other fish? (3) one if my biggest teeth (4) I think this is a Fossil? I was thinking enamel or ray but I'm not sure (5) I'm pretty sure this is a Fossil, but I could not get any good pictures of it up close unfortunately (I could try to get better ones later)
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Hello! I went out to Post Oak Creek in Sherman, Texas, this April and I found my first batch of shark teeth ever, about 46 teeth! I got some pictures of the six main ones I found interesting and that I would like y'all to ID for me. Thanks! (1/2) (3) cutie (4) Shark or Mosasaur? (5) These three goobers (6) Biggest boy I've ever found!
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From the album: Post Oak Creek
The "big guy" to find at POC. Though, this one is smaller, the preservation is as good as it gets for this location. In fact, it makes me believe that POC could draw from layers adjacent to the Eagle Ford Group. I've found matrix pieces that are consistent with the geology of EFG, but need to find matrix pieces with this kind of preservation to confirm Atco or something else. I'm also not sure that this is C. crassidens anymore since this smaller, narrower form differs so much from the holotype. I currently believe it's an undescribed species since I haven't found something that matches. Please let me know if you find a paper that fits this tooth (and the others at POC).-
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From the album: Post Oak Creek
Reconstructed tooth set from a "Crow" shark - Squalicorax (could be S. falcatus) - illustrating the variety of tooth positions. Anterior teeth have erect, triangular cusps. Lateral teeth and posteriors are more common and have an increasingly posteriorly slanted crown, resembling the teeth of modern tiger sharks.-
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From the album: Post Oak Creek
To find denticles, you need to go to the finest grain size. This beautiful one could be shark, but I'm not certain.-
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From the album: Post Oak Creek
Rhinobatos teeth are probably the smallest teeth you can hope to find here - they are about as small as grains of sand.-
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