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Found 160 results

  1. Septarian nodule

    From the album Post Oak Creek

    This is a septarian concretion from POC. It's about the size of a good strawberry. Collected 9/28/19.
  2. Cretodus

    From the album Post Oak Creek

    Some of my largest teeth come from Cretodus. They are frustratingly always incomplete. The center one on the top row has a neat feeding wear facet at the tip
  3. Micro shark teeth

    From the album Post Oak Creek

    Micro shark teeth fossils found in micromatrix collected 9/28/19. Clockwise: The upmost orange one is nurse shark (Cantioscyllium sp.) with intact root, goblin (Scapanorynchus sp.), crow (Squalicorax sp.), Hybodus sp., and either Cretodus sp. or goblin.
  4. Ischyrhiza sp. (sawfish) oral tooth

    From the album Post Oak Creek

    A small sawfish oral tooth found in micromatrix collected 9/28/19.
  5. Post Oak Creek

    From the album Post Oak Creek

    Photo taken 9/28/19.
  6. Shark centrum

    From the album Post Oak Creek

    Found 9/28/19.
  7. 9/28/19 Trip

    From the album Post Oak Creek

    I found less stuff than last time, but I found a nice centrum and a shard of a mosasaur tooth. A couple teeth grouped with Scapanorynchus may be Serratolamna sp.
  8. Stumping me beyond belief

    While I am more knowledgeable about fossils than when I joined, this thing is confusing me. It is porous with fine holes and appears to be bone, but it could be wood. Any clues?
  9. Post oak creek mystery micro tooth

    Hey y'all. I haven't seen anyone post about POC microfossils, so last time I was there I filled a sandwich bag full of gravel. I looked through it yesterday and found a bunch of neat stuff: sawfish oral teeth (see gallery), tiny sharks' teeth, vertebrae, fish teeth, mastodon ivory (?), bone, etc. There's this one tooth that I can't i.d. I'm not sure if it's sawfish, I don't think it's a shark. Thank you!
  10. Ptychotrygon sp. (sawfish) oral teeth

    From the album Post Oak Creek

    Tiny oral teeth from extinct sawfish. I haven't seen many posts about POC microfossils, so I decided to see what's there. I filled a sandwich baggie with gravel last time I was there and found these and a ton of other neat stuff. Scale bar ~ 1 mm.
  11. Cretodus crassidens

    From the album Post Oak Creek

    Tooth from a large Cretaceous shark. Scale bar = 1 cm. Collected 7/30/19.
  12. 7/30/19 Trip Haul

    From the album Post Oak Creek

    Shark teeth, mastodon enamel, and vertebrae found in POC on 7/30/19. Found more teeth than last two trips combined! Unfortunately, I didn't find any ptychodus or cretoxyrhina. Scale bar = 1 cm.
  13. Mosasaur Tooth Fragment

    From the album Post Oak Creek

    Mosasaur tooth fragment. Scale bar = 1 cm. Collected 6/21/18.
  14. Plesiosaur/Pliosaur Tooth Fragment(?)

    From the album Post Oak Creek

    A small chunk of enamel from a marine reptile found in POC. Could be plesiosaur. It has strong striations not found on mosasaurs. Scale bar = 1 cm. Collected 6/21/18.
  15. I recently took my 9-year-old daughter hunting at Post Oak Creek in Sherman, TX. We collected these about 200 meters upstream (NW) from the S. Travis Street Bridge. While she did not enjoy the bugs and frogs, we both had a blast finding shark teeth and other cool stuff. It was our first trip fossil hunting and I am complete uninitiated in identification. Can you guys take a look at these and let me know what's a fossil and what's a pretty rock? Trust me, she will be perfectly happy if they are all just pretty rocks. Besides what's pictured, we found about a dozen shark teeth and endless oysters. My goal for this post is to be able to more efficiently and accurately sift/sort through gravel the next time we go. Here is set 1. Item number 2 looks like a grinding tooth? Number 3 has a tooth shape, but no distinct edges. Number 5 looks almost like a coral growth. 6 looks like agate mixed with other stone.
  16. Can you find the shark tooth? (8)

    From the album Post Oak Creek

    A large cretodus tooth in situ. Collected 7/18/19.
  17. Can you find the shark tooth? (7)

    From the album Post Oak Creek

    A large and complete P. whipplei tooth. (There may be one more ptychodus on the far left that I missed .) Collected 7/18/19.
  18. Can you find the shark tooth? (6)

    From the album Post Oak Creek

    S. texanus tooth. Collected 7/18/19.
  19. Big teeth!

    From the album Post Oak Creek

    Large shark teeth including cretoxyrhina, cretodus, and ptychodus. (The left ptychodus would've been massive had it been complete.) Scale bar = 1 cm. Collected 7/18/19.
  20. More Ptychodus whipplei

    From the album Post Oak Creek

    I found lots of ptychodus this trip. Scale bar = 1 cm. Collected 7/18/19.
  21. Cretolamna appendiculata

    From the album Post Oak Creek

    Scale bar = 1 cm. Collected 7/18/19.
  22. Cretodus sp.

    From the album Post Oak Creek

    Two incomplete cretodus teeth. (It's possible the left one could be cretoxyrhina.) Scale bar = 1 cm. Collected 7/18/19.
  23. Cretoxyrhina sp.

    From the album Post Oak Creek

    Cretoxyrhina teeth, though the smallest one could be something else... Scale bar = 1 cm. Collected 7/18/19.
  24. Dipped S. texanus

    From the album Post Oak Creek

    Neat coloration on another S. texanus tooth. Collected 7/18/19.
  25. Scapanorhynchus texanus

    From the album Post Oak Creek

    S. texanus teeth from POC. Scale bar = 1 cm. Collected 7/18/19.
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