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  1. Thomas.Dodson

    North Texas Hurricane Vacation

    During hurricane Ida I left Louisiana and stayed in North Texas for a little while as a sort of fossil hunting vacation. I'm currently still in North Dakota as I wait for my power to come back in Louisiana but as a result I've had a little bit of time to start cataloging some of my finds. There's still a lot left to go through but I figured I should just post some trip photos and specimens now. Day 1: Day 1 was spent on the North Sulphur River. I stopped here once in 2015(?) on a trip but I got to spend much more time here this time. A familiar view to many.
  2. ThePhysicist

    Cretodus posterior

    From the album: Post Oak Creek

    Extreme posterior from a large genus. Note the striations at the foot of the crown, and no nutrient groove.
  3. Spent Saturday afternoon visiting Lake Texoma and Post Oak Creek. Overall not a bad day. Found some decent ammonite and rare Paraisurus tooth at the Texoma. Also found nice shark tooth from the Post Oak creek. Always nice size ammonites exposed on the surface at the Ammonite Beach. Water levels pretty low. About 6 feet under. Nice looking Paraisurus tooth from the Duck Creek Lake Texoma. Last time I found one was back in 2019. This was a nice find for me. Nice decent shark & fish teeth fr
  4. ThePhysicist

    A Physicist's Collection

    While my prime focus is essentially learning how to accurately describe Nature in the precise language of mathematics, I've always been intrigued by natural history - it's actually what started me on the path to physics. The sort of interrogation that paleontology practices provoked me to think and question even further, down to the fundamental science which makes it all work. Collecting fossils has brought a large amount of enjoyment to my life, and is often a welcome distraction from what can sometimes be straining work. The knowledge that I accumulate along the way is also part
  5. I took a vacation fossil hunting in North Texas to escape Hurricane Ida to much success. I hope to post a trip report with some of the finds when I get a chance and might need to post more ID requests later but this particular tooth from Post Oak Creek interests me a lot so I wanted to at least get this posted. It's rather water worn but I welcome any ideas you might have. Despite how it appeared in the field it now looks more fishy to me. Not sure it'll get past "fish". @ThePhysicist
  6. Austin83

    Is this a shark tooth fragment?

    Another Eagle Ford Group Texas find. The texture and color differs compared to every other tooth found, but it has a shark tooth shape. Thanks in advance.
  7. Tony G.

    Post Oak Creek oysters

    Does anyone know the Genus/Species of these common oysters from Post Oak Creek, Sherman, Texas.
  8. ThePhysicist

    Cretodus crassidens

    From the album: Sharks

    Cretodus crassidens Eagle Ford Group, Sherman, TX A smaller tooth from one of the largest predatory sharks in the Late Cretaceous (~ 90 Ma). It likely filled a similar niche in its environment that the Great White Shark does today. Its teeth are characterized by pointed side cusps, rounded root lobes, no nutrient groove, a shelf-like lingual root protuberance on anterior teeth, and striations (ridges) at the foot of the crown (on both the main cusp and side cusps). This tooth is as nice as they get in terms of preservation and completeness from this locale - this o
  9. ThePhysicist

    6/17/21 Trip

    From the album: Post Oak Creek

    Nothing extraordinary, but I found an area with several chunks of matrix with teeth in them.
  10. ThePhysicist

    Matrix chunk (1)

    From the album: Post Oak Creek

  11. ThePhysicist

    Ptychodus in situ

    From the album: Post Oak Creek

  12. ThePhysicist

    Scapanorhynchus in situ

    From the album: Post Oak Creek

  13. Hi everyone! Ya'll where a huge help with the shark teeth I posted, so I figured I'd ask for some help with some of the more unusual stuff I've found at Post Oak Creek. For anyone who doesn't know Post Oak Creek is a small gravel filled stream in north Texas that lots of Cretaceous shark teeth get washed into from the Eagle Ford Group (shout out to ThePhysicist for clarifying the formation!). However a lot of Pleistocene material gets washed in there as well so you get this lovely set of gravel bars where you're finding stuff like crow shark and goblin shark teeth in the same sift as a bi
  14. Hi everyone! I could really use some help identifying this one. I found it at Post Oak Creek. I included a bunch of pictures that I labeled so you all can know what I'm talking about. The microscope shots have a red scale bar that is 1 mm. Here's what I know it's Cretaceous 94-90 million years old from the Eagle Ford Group. the bone surface is mostly weathered but still in it's original shape. except for some major weathering on the back of the left side. It came from a large vertebrate. The bottom is flat, the back is concave, it slopes forward to a blunt
  15. Hi everyone! I went to Post Oak Creek, Texas a few weeks ago and got a decent haul. Including three teeth that I think are from some rare species that I wanted to confirm my id on. I think the first two are Cretoxyrhina mantelii and the third is Protolamna. I'm particularly unsure with the second one since it seems to have a slight nutrient groove. The first one also has damage where there would have been cusps so I'm not sure if it's a different Cretoxyrhina species or a different genus entirely. I'm fairly certain the creek is Atco formation. I know it's either
  16. Hello all! A batch of new unknowns found in my micro matrix! Any help will be appreciated! Cretaceous Eagle Ford formation. 1. Interesting geometric pychnodont tooth? I know they can be rectangular, but this one is oddly shaped. Size 5mm 2. Strange "fat" tooth". It looks sharky but the width of the base is throwing me for a loop. Perhaps the cusplet of a bigger tooth? Size 5 mm 3. An odd striated tooth. Size 6 mm 4. A very pointy something. I thought it was a Scapanyorhynchus tooth at first, but it's not
  17. shark teeth, left corner is a couple of ptychodus teeth, a black, tiny gastropod. I think on the right are just brown concretions. Below is a large view of bivales. Gryphea at top left a clump of gryphea top right. There's an ammonite tucked in there on the bottom right. At the top gryphea. Others are various bivalves. A black gastropod toward the middle. The brown peanut thing is a concretion.
  18. Hey all, I'm over the moon to say that my long pursuit of shark teeth was temporarily satiated a few days ago, with a trip to post oak creek that my non-fossil hunter girlfriend surprised me with (...i guess i must talk about it a lot, lol) so that we could take our minds off finals. Unfortunately, we were only able to hunt for an hour and a half, max - the area was supposedly set to be walloped by hail soon after we arrived. This was more than enough time to find probably around 30 teeth though, and a few really stood out. Here are some teeth that I can make an educated guess
  19. JamieLynn

    Odd Vertebra from Post Oak Creek TX

    Hi all! Found this odd little vertebra in my Post Oak Creek micro matrix. I assume it's fish, but the small end and the big end have me a bit confused. I am not too knowledgeable in vertebrate material so any help will be appreciated. Thanks! It is 8mm x 5mm
  20. Good morning! Found this little interesting tooth in my Post Oak Creek matrix. Did a bit of online research and have concluded (tentatively) that it is a vole molar, possibly Pleistocene? I don't think it's modern because of the coloration. I have seen that fossil rodent teeth have been found in POC matrix. What do y'all think? Size 4mm
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