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  2. investigating a "cave" inside a rock

    I think that this might be more mineralogical/geological rather than organic/fossil. It looks to me like calcite or possibly quartz from what I can tell from the photos. I love that you are interested in such detail and are so excited by the topic. In such detail lies much science that is oft times overlooked by the casual observer. Keep on keepin' on!
  3. Trilobite cemetery?

    I can't see what's going on exactly in those pictures, but, yes, multiple trilobite bits or many whole specimens in a death assemblage are not uncommon. This is where current action moves many corpses together into one place where they are covered with sediment and then preserved.
  4. Trilobite cemetery?

    Those look like fragments, primary cephalons of Redlichia chinensis from the Cambrian of China. They definitely come from multiple different ones. Here is one that is mostly complete in my collection.
  5. Trilobite cemetery?

    Hello guys, I've just received two curious rocks that supposedly contains real trilobite fossils, the most curious thing on these rocks is that they look like a trilobite cemetery, there is a lot of trilobite parts. (it comes from China), have you ever seen such specimens? Can you confirm that these rocks contains dozens of different trilobites? Thanks in advance.
  6. A few fossils in need of IDs from Penn Dixie

    Very interesting, thank you both for the help.
  7. A few fossils in need of IDs from Penn Dixie

    Yaaaaaaaaaaaaaaaaayyyyyyyyyyyyyyyyyy!!!!!!!!!!!!!!!!!!!!!!!!! Makes a change.
  8. A few fossils in need of IDs from Penn Dixie

    I think you've got spot on.
  9. Method to determine shark development stage from teeth

    Unfortunately, evolution was not so kind. Certain species have some features better expressed in juveniles, or the other way around. Is there a particular species you have in mind?
  10. As always, thanks again to Piranha for the clarification. I should have been a bit more clear in my initial post. I sent this specimen to the author of the paper (Jason Dunlop) approximately ten years ago. He was the one who identified it as Geralinura. It is not a surprise that the MC Prothelyphonus Is likely the same animal as Geralinura.
  11. Crab fossils from Rakhine State of Myanmar

    Some of the Facebook groups like Paleontology or Fossil Decapods might be able to help
  12. Unique Mazon Creek

    The Titanoceras is pretty impressive. Not sure about the Jeletzkya. It is definitely a possibility. Cannot make out enough detail to be sure.
  13. Micro Unknown From Florida

    Are modern insect parts "flexible" to some extent? Even though it is likely not to be a fossil, it has me curious what it belonged to. Any entomologists amongst us that could ID this? Mike
  14. Tyrannosaur roots

    Ok Thanks!!
  15. Method to determine shark development stage from teeth

    Wow thanks for the link Mason. I agree that nothing can be done without a large sampling but i was naively hoping that some feature could be only found on young shark's tooth.
  16. A few fossils in need of IDs from Penn Dixie

    Hmm. Maybe a little big, but I have to confess as to not knowing the size range of this species.......................
  17. Reposting in hopes of a second look

    I posted the below pic's previously and apologize if I am overstepping by posting them again. Am hoping for some input on whether or not this partial tooth could be Gomphotherium as opposed to Mastodon. In viewing numerous online images I felt it may be Gomph. Any feedback would be appreciated . Thanks!
  18. Need help identifing what is wrapped around fossil

    It looks like you have shark coprolite that has been reworked. Shapes of this sort are very common in marine lag beds that have reworked shark coprolites. The core that you are seeing is one of the inner spirals. the remaining "wrapped" bits are subsequent spirals. Due to reworking, some of the spiral layers have been broken or partially removed.
  19. Hello, I’ve noticed something odd with some of my mazon creek fossils that I haven’t looked at in a long time. Some of them seem to have small spots developing on them that I could swear weren’t there, say, 10 years ago. Anyone have any idea what these little circles are? There are 4 on the left Tully monster right above the white paint. And 1 on the right Tully just off the lower left edge of the body. And the white paint is a whole different issue... Open to any suggestions on how to remove that too... was thinking about rubbing alcohol. And then here is a shark egg case that seems to have a LOT of the little spots/circles. Thanks for any insight.
  20. My little Mazon Creek collection

    That’s a nice collection with some good representative examples. My first Mazon Animal was an Essexella and I just built my collection from that.
  21. A few fossils in need of IDs from Penn Dixie

    Thank you, I currently do not have the piece with me but I would say it's 2-3 cm at the widest point.
  22. Today
  23. Help Id'ing Crawfordsville Crinoid

    Indeed. I have edited the display name to remove the email format. @georocks58
  24. Unique Mazon Creek

    And he doesn't look too happy either, stuck forever on that fossil....
  25. A few fossils in need of IDs from Penn Dixie

    Others know the Penn Dixie fauna much better than I, though I have some brachiopods and other bits from there which I love. How big is it? But as a preliminary guess, I'd go for the rhynchonellid Camarotoechia congregata. Which would be a great find as I don't have any! But I'm probably mile out. Let's ask someone who knows the site personally. @Kanemaybe?
  26. investigating a "cave" inside a rock

    To show scale...
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