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  1. ThePhysicist

    Cretodus tooth

    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 ma
  2. ThePhysicist

    Crow shark positions

    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.
  3. I made a brief stop at Post Oak Creek traveling around Texas a couple weeks ago. I didn't have much luck searching for large fossils this time but looking small turned up some decent material, a few of which I wanted to request some identification help for. First is this mammal tooth. I don't know how many people look into this small Pleistocene material. @Harry Pristis @Shellseeker, any ideas? Next is this small mosasaur like tooth. It reminds me of some of the teeth that appear in a recent ID thread. @pachy-pleuro-whatnot-odon, any ideas on thi
  4. Hello everyone! While I was cleaning out my phone I forgot I had these finds that I would like second opinions on identifying from Post Oak Creek near Sherman, Texas. I found these right before I had to fly out to Iceland so the setup is very messy and was done quickly. I love hunting here, and have a general understanding on most of my finds there which are mostly various shark teeth and lopha oysters. Usually confident in identifying however I never got to go to school for paleontology so I’m still an amateur! Im always so eager to love to learn more about the ancient Cretaceous sea life eve
  5. GPayton

    Post Oak Creek Shark Teeth

    I've only been able to make it out to Post Oak Creek in Sherman, Texas once before, but I was fortunate enough to be able to spend an entire day shoveling and sifting and managed to come away with a decent haul of mostly complete shark teeth. Most of what I found was pretty easily identifiable, but I've held on to the three teeth that I found that day that continue to make an ID difficult despite how (mostly) complete they are. The first tooth I'm also certain is a Protolamna. It has the characteristic longitudinal ridges on both sides, the dental band on the front, and the c
  6. freerangetraveler

    Possible Enamel???

    Spent the day out on Post Oak Creek in Sherman Texas… I met some new friends and found a fairly good haul of shark teeth. In addition, I think I may have stumbled across a small piece of enamel… Maybe mastodon??? I’d love to get the groups thoughts on what that is (or tell me if I’m way off base). cheers!
  7. freerangetraveler

    Possible Enamel???

    I need some help with this one… I pulled this out of Post Oak Creek (Austin Chalk Formation) in Sherman Texas yesterday. The ridges on the top and sides lead me to believe it may be some type of enamel. It is somewhat translucent, but not transparent like quartz. Does this look like enamel or am I way off base here? If it is indeed enamel, any thoughts on what species it may be from?
  8. ThePhysicist

    Shark? dermal denticle

    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.
  9. ThePhysicist

    Rhinobatos tooth

    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.
  10. Just a quick post. Was picking through some washed gravel I got from Post Oak Creek back in the winter when I stumbled upon this guy. I'm surprised my screens were fine enough to catch him. Taking clear pics was a bit difficult so apologies for blurriness. I'm curious about what sort of shark would have a tooth of this size. Was it just a tiny pup or were there just really small species? The hashmarks are millimeters. I might make a post about my POC micro finds once I finish going through it and identifying stuff. It's a long process, but there are plenty of fun
  11. TiffMarie

    Tooth ID

    Just wondering if anyone can tell me what these might be?! My boys were ecstatic to find them. Thanks!! found in Post Oak Creek, TX
  12. ThePhysicist

    Cretolamna sp. Shark Teeth

    From the album: Post Oak Creek

    Cretolamna teeth from POC. The largest one seems to be the C. dwardius as described in Welton and Farish's guide, the others are C. appendiculata.
  13. This past weekend I had the time to take some friends on their first fossil hunting trip and went to North Texas. I took them to Post Oak Creek, Lost Creek Reservoir, the North Sulphur River, and the Cane River site in Louisiana I posted about last time. I wasn't expecting too much since there hasn't been much rain and it'd be picked over but I was okay with that since even common material would be new to them. I also ended up having some decent luck myself so I wanted to post some of the finds. At the Eocene Cane River Formation site I collected these bivalves which I hadn't colle
  14. I made another trip to Post Oak Creek yesterday. I visited a spot on the creek where I'd already been twice last year, in the first months of my fossil hunting. The conditions the second trip were much like yesterday, months of low water and very picked over. I didn't find much that second trip. But I suspected that I have become much better at spotting tiny teeth on a gravel bar, and went back yesterday anyway. Judging from what I found, I must have been right. There were lots of broken teeth again, and nothing spectacular or unusual enough to justify a post, but I do enjoy docume
  15. Thomas.Dodson

    Post Oak Micros

    I've been sorting micro-matrix I collected during my recent trip to Post Oak Creek (Eagle Ford, Turonian stage). Overall I've had great success identifying everything (even what I believe to be a Coniasaurus tooth) but I have run into some difficulties with some small shark teeth. I've tried taking some pictures through my scope although I don't have a mounted camera for it yet. #1. This one is kinda smoothed over so it may be hopeless but the weird roots throw me a bit so I wanted to post it. 3 mm in length. The nutrient groove on this one throws me as it resemble
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