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Found 160 results

  1. While playing with my poo (the fossilized version), I noticed this imprint. It is adjacent to a bone fragment. I'm assuming it is the imprint of a piece that broke away from the bone inclusion. It looks a bit unusual/ornamental, but I am hoping it is recognizable to one of you brilliant bone folks. This is from the Oligocene, Brule Formation, South Dakota. @Carl
  2. Archaeolamna sp. South Dakota

    From the album Cretaceous Shark Teeth

    Archaeolamna from Carlile Formation, Grant County, South Dakota.
  3. Archaeolamna sp. South Dakota

    From the album Cretaceous Shark Teeth

    Archaeolamna from Carlile Formation, Grant County, South Dakota.
  4. I have had a bunch of broken bits of Oligocene mammal coprolites sitting in a cup for years. I got them before I had a proper microscope. I decided to pick through another one last night. This one had what I thought could be a rodent incisor. So I started excavating with my X-acto blade. As I uncovered the bone, I realized it was not a tooth. I started noticing these very fine crescent shaped objects (which I unfortunately did not photograph). So I decided to give the poo a little vinegar bath overnight. As I lightly removed an unremarkable bit of fossilized fecal mass this morning, it split away revealing what might be a feather. I wet a bit of downy feather and photographed it for comparison. What do you all think? @Carl, didn't you have a coprolite with a feather inclusion? If so, did it look like this? The bone that I exposed is very furrowed and hollow. Of course this may not mean anything other than it is partially digested. Could it be a bird bone? @Auspex Here is the before and after photo of the coprolite fragment. Here is a magnified image of the a wet modern feather and the possible undigested feather.
  5. Since I couldn't go out to dig for fossils, I decided to go on a micro dig. Today's dig was in a coprolite fragment from the Oligocene. Prior to excavation, the broken face of the coprolite looked like this. You can see a little bit of bone peeking through. After about an hour of excavation under 40X magnification, I uncovered what I think is a rodent tooth and possibly a toe bone and claw??? What do you think? Does anyone out there know their Rupelian rodents? Grinding Surface of the tooth: Side view showing roots: Small toe bone and claw or an fractured toe/foot bone? Is fossil poop cool or what???
  6. Old collection ID help needed

    I collected these when I was younger and living in the Black Hills, South Dakota. Because they were collected 20-25 years ago I cannot be more specific about the location. My family owned some land in the northern part of the Black Hills and they are most likely from there. I really don't have much knowledge in this area but both seemed interesting and I have always wondered what they might be, if anything. Thanks in advance!
  7. Unknown fossil

    Buddy found this by his job. Wondering if anyone can identify it
  8. I bought this at a little shop near Deadwood (not the antique store from my other posts) & am curious what part of the body does it come from. The hip? It looks like there are bite marks on it too... I believe the shop owner said it was from an Iguanodon.
  9. Fossil ID please?

    Found at a antique store near Deadwood
  10. Last year's Hell Creek finds

    Here are some of the better finds from my digging trip in South Dakota last year. First up is what is likely an osteoderm from Ankylosaurus. This specimen is gone for research. I've got a "stupid rookie" story to go along with this if anyone is interested. Next is a section of Edmontosaurus rib with the head and part of the main. This still needs final cleaning and consolidation. I'm still debating whether to leave them separate or re-create the missing portion and join them. This is the largest and most complete ossified Edmontosaurus tail tendon I have seen. Most of the time you only find little 1 inch sections. This one is completed prep, retaining some of the matrix and a random BOB, as dug. Nice chunk of turtle shell. I have a love/hate relationship with these. This is one is large and quite thick. Most of them are extremely thin and fragile as egg shell. Still needs final prep and consolidation. Unfortunately its a covered in CA, which is making it so much harder. A very nice Tricerotops tooth that my son recovered. He is like a magnet for these large trike teeth. This is the 3rd big one he's found. All I find are tiny spitters. This is a juvenile T-Rex tooth, found beside the Ed rib. This one is gone for research. There's also a small nano-T tooth missing its tip, and a large BOB which I think could be a bit of Trike frill. No pics of those available at this moment. I'll have to add them later.
  11. Fluorescent Bacculites.jpg

    From the album Fossil Flourescence

    I was playing around with the UV lamp in my lab, seeing what might unexpectedly glow this afternoon. This was a nice surprise. It's an internal mold of Bacculites sp. with sutures that fluoresce orange under 345nm UV light. Bright orange like this usually indicates calcite, a mineral that makes up fossil shells and some modern ones, too. Between the mud-filled chambers, the shell was preserved while the exterior of the cone wore away. The shell material was either calcite to begin with or, more likely, began as aragonite (same chemical compound as calcite, but different crystal structure and glows yellow instead of orange) and changed over millions of years to the more stable configuration of calcite. Meanwhile, the mud looks like it may have a little bit of some fluorescent minerals in the mix, but it's mostly a daylight-only affair. The blue may be some residual glue from a label. This specimen is from the late Cretceaous Pierre Shale Formation in South Dakota.

    © C. 2020 Heather J M Siple

  12. Hell Creek Turtle Beak

    Here's an interesting fossil I found from the summer which I am just getting around to posting. I believe it's a piece of turtle beak based on its shape and the numerous holes which I believe are part of the vascular structure of the beak, rather than just the standard cancellous tissue of bone. Here's a modern one I found online for comparison. And one from a marine turtle on the Oceans of Kansas website.
  13. Hell Creek Oddity

    I found this bone over the summer in the Hell Creek formation of South Dakota. I have no idea what it could be, and I don't even know if it's complete. It's slightly reminiscent of the ear bones I see on here sometimes, but that's just a guess. The fossil is about a centimeter from top to bottom and around 8 mm wide
  14. Unidentified spiral fossil

    Three different people have posted what I think is a very similar if not the same fossil. In my original post I said it was Mississippian. However, I did purchase it from a dealer that described where he found it. I was not there. He was elderly at the time so there could have been confusion. I think he has passed now, so no way to know Let's assume age is unknown. Here are the other postings. https://photos.app.goo.gl/BCMTpriMfuSoaCi79
  15. Turtle ID please

    Good Evening folks. Can anyone tell me what species this turtle from South Dakota is?
  16. Help on Claw ID

    Hello everyone, I found this nice claw in South Dakota over the summer and have yet to find a definitive match for its identity. It's about a centimeter and a half long.
  17. Prepped Oreodont skull

    Here is an Oreodont skull I prepped a few years ago. I did have to glue some of the larger rear skull pieces together, but otherwise there are no restorations. Just sharing with the group.
  18. Teeth ID requested

    Can anyone help identify these fossil teeth? One was in a section of matrix from Nebraska and the others came from sections of matrix from the Badlands of South Dakota.
  19. Hell Creek dinosaur toe bone?

    I picked up a little Hell Creek lot that hat this fossilized bone in it. I think it might be a theropod toe bone from looking around on the web at Hell Creek bones. Anyone with more experience (most everyone) have any opinions?
  20. Hello, I saw this online. Just curious if it actually is what the label states: Oreodont Braincast / Badlands of South Dakota / Oligocene Period. Thank you for any and all help.
  21. Possible micro mandible found.

    Hello member of TFF. I finally got a chance to really dig (sort of pun intended) into some matrix I bought back in December of 2013 from I believe tj102569 (but it's been so long I cannot find the sale post anymore). If I remember correctly the matrix was from a quarry in possibly Grant county South Dakota. But it was definitely from a quarry in South Dakota (yeah I know there are more than one). The matrix is pretty hard. Engraver and dental pick don't do much more than scratch the stuff. The seller at the time said he used a hammer to just break it open and find sharks teeth. But I was after large and micro fossils so I didn't like that path. I started to use regular 3% peroxide with a small amount of success and combined with the engraver found a few things, but not as well as I would like. So I store the matrix away until I could find a better solution. Flash forward to now in my new prep room and some 12% food grade peroxide and I get results I like. The 12% really breaks down some matrix. Word of warning though I measured temps of 167.4 Fahrenheit so if you chose this method be sure to use containers that are good with cooking temps (old food grade containers are what I use). Anyway low and behold I believe I have found a mandible. But it broke on me as I was picking it up with tweezers. What do you think? And this is the starter matrix. Thanks for your help.
  22. Ankylosaur armor?

    I was hoping some folks on the forum could confirm this ID for me. I found this interesting little piece in the hell creek formation of South Dakota back in July with Paleoprospectors. I was told by one of the guides that it could potentially be a piece of skull armor from a young ankylosaur. I want to know what everyone here thinks.
  23. Skull, Teeth, Jawbone, etc.

    Hello everyone and thanks in advance for any help or ideas. Earlier this summer my friend moved to South Dakota and purchased a home. A few days ago he was cleaning out a shed on the property and found a cardboard box filled with the fossils seen below. It is unknown if the prior owner had found these on the property or if they had been purchased elsewhere. So unfortunately he has no idea where or when these were originally found. Neither of us have much experience in this but obviously fossils such as these catch your attention! If anyone wants or needs additional pictures let me know and I will see if he can send more. I have included mostly pictures of the skull and teeth as I figured they would likely be most helpful for identification. It is assumed all these pieces belong together but it is possible it is just a random collection. The pictures in order are: skull facing front, skull bottom, skull side (close up), three different angles of the jaw/teeth, and then one pic of all the pieces together with a ruler to get a ballpark idea of sizing. Hope you guys enjoy the pics and hopefully someone out there has some guesses. Thanks!
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