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  2. Tetradium

    Any help would be appreciated.

    guess they don't end up in twin cities. I had found nontwinned starolite and plenty of mica which seem to show glaciers moved them from an bed on upper Mississippi river. Book listed one outcrop of mica with starolites on it in one spot up north but I hadn't visited it.
  3. You pose an interesting question. I would suggest the following paper as a place to start your explorations on this question: https://www.sciencedirect.com/science/article/pii/S0025322718301725 The paper is titled: "Fossils from seabed bedrocks: Implications for the nature of the acoustic basement of the Mendeleev Rise (Arctic Ocean)"
  4. Al Dente

    Any help would be appreciated.

    Here are some photos of my nicer piece.
  5. DPS Ammonite

    Seeking identification on Alberta specimen

    Bone or sponge; I can’t tell from photo which one although I lean towards bone. Sponges have holes/ mesh that interconnect so that the water can reach all parts of the sponge. The spongy interior of a bone does not have to connect with the outside of the bone. Do we know the age and formation of the local rocks? Dino bones seem to be common in the area.
  6. I think keeping the Holotype from others is significant and feeds the controversy.
  7. pachy-pleuro-whatnot-odon

    Russian fossil sites

    Still hoping you'll surprise me!
  8. No, what is today the middle of the ocean is geologically young. You have to look at how plate tectonics function. Plates move apart because new material if coming in and pushing outward. The outer edges of the plates are considered, then you have to think about how many of those edge have been subducted under other plates. In the end, it would be a purely academic exercise anyway. Even if there were fossil beds under the middle of the oceans, they cant be explored. It would be easier to strip-mine the known fossil bed areas to search for new fossils than to explore under t
  9. PaleoOrdo

    silurian octopuses?

    The first photo, since it show top-rounded cones of the siphuncle, may it be an endocerid?
  10. RuMert

    Russian fossil sites

    Come on, Alexander, you know it already Deltodus fish tooth from 4 angles
  11. Al Dente

    Any help would be appreciated.

    It looks like Cretaceous pisolitic clay that occurs in Minnesota. I was told at one time that this was bauxite but it lacks the high amounts of aluminum that bauxite has. I have several pieces that I found in Iowa that were glacially transported from Minnesota. I'll take a photo later today. It looks nice cut and polished.
  12. hadrosauridae

    A Dissection of Dakotaraptor Status

    Nice "posts". I liked the info, but twitter is a terrible medium for that type of posting or discussion. I did like this quote the best "Unfortunately, the mess of Dakotaraptor, and it's admittedly overblown controversy, is due to the actions of those directly, indirectly, and not at all involved in the process of its description...." Yes, even the people totally uninvolved in the creature are to blame! LOL It sounds funny even though its true.
  13. JimB88

    Any help would be appreciated.

    Looks like a weathered coral of some kind
  14. Is this a Moroccan specimen? It looks like it. The split through the middle occurs when the collector whacks a rock and it breaks through the middle of the specimen. From this the chap can determine the orientation of the trilobite. Then the specimen is glued back together again and prepping starts with the knowledge of where the trilobite is. It looks genuine to me except for possible fiddling with the very ends of the spines.
  15. grg1109

    Any one know what this is?

    I want to Thank You Rockwood and everyone else for your help, time and patience, I really appreciate it. Greg
  16. historianmichael

    Shelling Along the Chesapeake

    Thank you all for the kind words. It was a lot of fun to collect these and I hope to get back there soon to hopefully find something new or better. One of the shells that I found that did not survive fossilization was a larger whelk shell. Most of the shell was not there. I would love to find another one of them. @Al Dente Thank you so much for the ID! I was dissatisfied with that identification when I made it. It kinda looked like the drawing in the Maryland Miocene Plates but I couldn’t find a photo of it online. I will make the change on my reference card. @Nick G. T
  17. EDIT 2: Probably a piece of bone. Stratigraphy anyone? Sponge spicule network or trabecular bone - I may be wrong, but I don't think bone has the regular enclosed circular spaces as shown here. I'm not sure though, I'm not very well up on bony stuff. (And it's not coral.)
  18. Pickles

    Recent Findings in Venice, FL

  19. FossilDAWG

    Small hollow tube looks like it was rolled in crushed rock

    Just to be clear, the caddisfly cases are modern not fossil. Don
  20. Dakotaraptor steini was found in a multi-species bonebed in the Hell Creek Formation and lots of questions have been raised around this material since it was described. Elements of the holotype were found to belong to a turtle (furcula) and Anzu (Tibia) and questions raised on others. To make matters worst the holotype is not available for study.. So its been shrouded in controversy. A good review of where we currently stand is presented in the attached Twitter thread
  21. Thoughts on this Harpes trilobite? looks good to me. matrix colour is different, split through a crack on the specimen. prep looks ok and eyes are nice and beady. Anything anyone else notices/wants to comment on?
  22. Today
  23. Vickie B.

    Any help would be appreciated.

    I found this over the weekend at a rock quarry in west central Minnesota. I just cannot find out what it is. Can anyone help me? It's not magnetic and weighs what I feel it should, for the size.
  24. FF7_Yuffie

    Let's see your latest mailbox score!

    I bought a Chinese pterosaur tooth, from Yixian Formation. A pterosaur expert from China took a look and said its pterosaur, so figured I'd buy it--add a new pterosaur to my collection. Unfortunately it has been repaired--but still, Chinese pterosaurs are hard enough to get hold of that I am pleased with it, despite the repair across the middle.
  25. Wrangellian

    Show us your stromatolites

    Ha.. I was just wondering if there was a thing called Cladopora, and started trying to search... but no need!
  26. Tidgy's Dad

    Show us your stromatolites

    Absolutely. A very nice piece indeed.
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