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  1. 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.
  2. 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
  3. 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
  4. 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.
  5. 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
  6. 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
  7. 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
  8. 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
  9. Cretaceous Eagle Ford, #1 I know it's worn and broken root but both edges are serrated, Hemipristis? #2 Both Enchodus or the smaller one possible Xiphactinus? #3 Had hard time getting details, assuming it's some kind of tooth, bony fish? Ptychodus?
  10. flyingpenut

    Post Oak Creek Oddities

    I usually don't post the trip to POC anymore but this time there were some oddities i wanted to confirm and or see if anyone knows what they are. I found the usual few ptychodus teeth as well as tons of broken shark teeth but also some more rare items. There is one small shark vertebrae, a piece of a fish vert, two broken ends of sawfish rostral teeth, a weird piece that looks like coral to me but also looks like it has teeth poking out of it, a large piece of mammoth enamel, and what I believe is a small mosasaur tooth. Pictures 2, 3, and 4 are the mosasaur tooth. I have it in my hand for sca
  11. val horn

    Maybe its a pearl?

    I think it is a fossil pearl. It was found in a shell fragment in Post-Oak Creek texas, but I am not sure as it is the first I have found. If it is a fossil pearl how do fossil pearls relate to common pearls
  12. Here is my latest trip to POC. Another nice large tooth (I took a picture with a cm ruler for the non-Americans out there), some mastodon or mammoth enamel, a few nice ptychodus, chunkasaurus, and several chunks of matrix with teeth sticking out of them. I also had a few questionables. Anyone know what kind of tooth is in pictures 5 and 6? Or 7 and 8? Im thinking 9,10, and 11? 12, 13, and 14 might be crushed crustacean or coprolite? 1. 2. 3. 4. 5. 6. 7. 8.
  13. dr_doink

    Mystery Tooth

    Hey All, Spent some time in Sherman, Texas the other day doing a lot of creek walking on the Post Oak Creek and came across an arrowhead, a ton of shark teeth and some other shells and stuff on the gravel bars but this tooth is making us scratch our heads and we need some extra eyes. Any kind of help would be appreciated, thank you
  14. 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.
  15. 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.
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