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  2. Shark teeth

    I would say they were types of "Tope" sharks, but I could be wrong.
  3. Tiny osteoderm from Cookie Cutter creek

    A good mystery does not give up its secrets easily--but when it finally does, the reward is that much greater. Thanks again for the excuse to look into Dasypus bits and finally recognize the buckler form. Cheers. -Ken
  4. Tiny osteoderm from Cookie Cutter creek

    Ken, baby armadillo was my first gut feeling... but now... I am going to see about looking at the lizard possibility some. What really bugs me, is the fact that these holes go all the way thru the thing.
  5. Tiny osteoderm from Cookie Cutter creek

    Thanks Mum. Now if we only knew what it is. Thank you Jeff. Again for this terrific matrix that keeps on giving. I've got some work to do to figure this one out.
  6. Fossil Identification Mazon Creek Formation

    Thank you very much Ken, cheers!
  7. My Tyrannosaur research

    Agreed there are a lot differences but there are also a lot of similarities.
  8. Hi everyone, My name is Dean, I live In Bath UK where we build a lot of buildings from white lias stone. We often find a lot of shell and ammonite fossils while dressing the stone, Recently we were digging a trench through a while lias bed in the middle of a field for a build in bath and I found a stone which was made up from pretty much all shell fossils, I bring them home for my little girl. I am an absolute newbie to fossil hunting and after browsing through your site I don’t even know if it’s worthy of posting! But my little one has asked me to find out what it is so here I am. Any help would be greatly appreciated.
  9. Show Us Your Dinosaur Jaws!

    Thanks @dinosaur man unfortunately, it’s no longer in my collection but still a cool piece!
  10. Fossil Identification Mazon Creek Formation

    Welcome to the forum! That's a very interesting Mazon Creek concretion that I've not seen before. We have a number of members who are very familiar with the fossils from this location and I'm sure you'll get some good information soon. @RCFossils @Rob Russell @Nimravis @stats @Mark Kmiecik Cheers. -Ken
  11. What could this be????

    Do you do cars as well? Mine sorely needs a good wash and wax. It's a nice geological specimen of intrusive silica veins and I don't think your treatment of it harmed it in any way. Cheers. -Ken
  12. Stand by ME

    Ha! You photographic Philistine; don't you recognize artsy soft focus, a technique employed by all master photographers (such as snolly)?!?!
  13. Fossil Identification Mazon Creek Formation

    My great grandfather majorly shaped who I am today by getting me introduced to biology, paleontology, and earth sciences at a young age. He left me with many fossils that he had gone out and found himself, picking about in the Mazon Creek Formation of the Carboniferous. Among the ferns and leaves I had found this one, it looks a lot like a negative impression of an invert to me, although I could also see it being a leaf impression. I'm pretty immature so I'd appreciate any help, thank you
  14. 30months collections

    Hi, it is very strange. Are you sure it is fish skin ? This reminds me of dermal denticles that make up shark or ray skin. How big is it ? But maybe it’s too old for that. @MarcoSr Coco
  15. My Tyrannosaur research

    They don’t look very similar to me. I see multiple differences between the 2
  16. My Tyrannosaur research

    I have another the first skull is a reconstruction from the Dinosaur Park Formation Daspletosaurus sp. specimen FMNH PR308 skull. And the second is a reconstruction of the skull of the Tumbler Ridge Tyrannosaur. These photos are better then my photos from before. They look very similar. Any opinions would be great.
  17. spores on leave?

    Might be... I'm still learning about all the possible traces of insect-plant interactions. Nevertheless, the images shown here closely resemble some of the structures described in Laass and Hauschke (2019). Coincidentally, I recently mentioned this paper in another thread. The paper describes oviposition on Cordaites from the Carboniferous of Germany. Direct link to paper: https://www.sciencedirect.com/science/article/abs/pii/S003101821930241X Some links to the images: https://images.app.goo.gl/rguWrCSM9ymVZR4eA https://images.app.goo.gl/vUMzyrSziRDBw67V8 https://images.app.goo.gl/sfu5CA2gayLAauoRA
  18. Today
  19. Fossil Shell?

    I figured as much. I see tons of shell fossils here. This just had an odd shape. Thanks.
  20. Trilobite Plate Fragment from MN Decorah?

    Tons of crinoid segments and brachiopods in these plates! This area of the Ordovician sea covering Minnesota was particularly shallow from my understanding. I would assume that tropical wind and storms battered it often causing erratic currents and waves. Thats just speculation on my part though, Cheers!
  21. List of Ways Fossils are Preserved

    Okay here is the latest list. I am very surprised it has grown so much since the beginning of the thread, from 20 to 30. Thanks to everyone for all the help. 30 WAYS FOSSILS CAN BE FORMED DUPLICATION 1 Internal Mold (minerals in contact with inner surface solidify then original dissolves) 2 External Mold (sediment in contact with outer surface solidifies then original dissolves) 3 External Cast (original outer surface dissolves and space fills with solidifying material) 4 Internal Cast (original inner surface dissolves and space fills with solidifying material) MINERALIZATION 5 Permineralization (space between cells fills with minerals that solidify) 6 Petrification (space between cells fills with silica binding to cellulose) 7 Replacement (cells replaced with new minerals that solidify) 8 Recrystallization (replacement when the new minerals are a crystal form) DESICCATION 9 Remains preserved in a Peat Pit 10 Remains preserved in a Tar Pit 11 Remains preserved in Frozen Tundra 12 Remains preserved by Mummification ICHNOFOSSILS OR TRACE FOSSILS 13 Tracks 14 Infilled burrows 15 Coprolotes or droppings 16 Feeding traces 17 Urolites or urine splatters 18 Regurgitants or vomit 19 Body rests 20 Gastroliths 21 Bite marks 22 Bio-sedimentological structures like stromatolites 23 Termite mounds 24 Hardened plant resin OTHERS 25 Carbonization (thin carbon film formed by chemical change) 26 Coalification (carbonization occurring by much slower processes) 27 Adpression (compression-impression) 28 Resin Inclusion (Life trapped in resin which hardens into amber or copal) 29 Bioimmuration (impression formed on a shell by growing over another life form) 30 Condensed Phosphorite Pseudo-Steinkerns (bioimmuration replica cast in phosphorite)
  22. A new theropod-related paper is available online: G. F. Funston & P. J. Currie (2020) New material of Chirostenotes pergracilis (Theropoda, Oviraptorosauria) from the Campanian Dinosaur Park Formation of Alberta, Canada. Historical Biology DOI: 10.1080/08912963.2020.1726908 For a long time, after it became clear that Caenagnathus and Chirostenotes belonged to Oviraptorosauria, and following the description of complete postcranial remains of Chirostenotes from the Dinosaur Park Formation of Canada, scientists debated whether or not Caenagnathus is a junior synonym of Chirostenotes, because CMN 2367, CMN 8538, and RTMP 79.20.1, despite overlapping with each other, lacked cranial material. A specimen from the Horseshoe Canyon Formation (ROM 43250, now recognized as distinct taxon Epichirostenotes curriei) found in 1923 was described by Hans-Dieter Sues in a paper published in 1997 and touted by him as confirming synonymy of Caenagnathus and Chirostenotes due to presence of cranial material in that specimen. Not all scientists, however, were convinced that Caenagnathus was the same genus as CMN 2367, and studies in the previous decade indicated that more than one caenagnathid mandibular morphotype existed in the Dinosaur Park Formation. Now, UALVP 59400, the first articulated Chirostenotes specimen to preserve cranial and postcranial material, shows that Caenagnathus and Chirostenotes are separate taxa, even though it's clear from the description of the younger genus Anzu that Chirostenotes and Caenagnathus belong in the same family (Caenagnathidae). That said, does anyone have a copy of the above-mentioned paper I could look at, given that UALVP 59400 is the first bonafide Chirostenotes specimen with cranial material that overlaps with the Caenagnathus holotype?
  23. North Sulphur River Texas!

    Thanks everyone.
  24. Show Us Your Dinosaur Jaws!

    I’ve just found this topic, and seen this jaw, amazing jaw!! I’ve never seen a Baryonyx jaw!!
  25. madagascan bivalves

    I would suggest not posting until you have your photos on your computer, as we can't help ID what we don't know what you have. There should be nothing preventing you from pasting or uploading photos. Topic locked.
  26. What could this be????

    LOL It sure is a good candidate for an alien pod or an ancient forest cat "deposit".....
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