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  2. I'm really liking the two complete Pecopteris fronds that cross each other and are attached to the branch. Fourth photo down from the top on the right side. Only that Annularia bouquet is SOOOOO appealing!
  3. My Collection

    Bothriospondylus madagascariensis Size: 56 mm - 2 1/4" According to the seller the location of the tooth is Kamoro, Madagascar however not sure if this is accurate. Also the seller states that the tooth belonged to the dinosaur's maxilla or predental. Archaeodontosaurus descouensis Size: 30 mm - 1 1/4" According to the seller the location of the tooth is Kamoro, Madagascar however not sure if this is accurate. Some additional photos next to a scale Two Bothriospondylus teeth next to each other. A rooted one and another tooth with a huge crown. Who knows if the tooth with a big crown is a totally different species yet that's the cool part All of my sauropod teeth lined up @Runner64 as requested!
  4. Marble Mountain trilobite id

    Notwithstanding the useful update on the systematics of Mesonacis fremonti, I agree with Brett that there isn't anything in the photos that is enough to be diagnostic of any particular trilobite species. Don
  5. number of bones for school math book

    Hello Gonzalo, and Welcome to the Forum. Have you had a look at THIS WEBSITE? Good luck, and welcome again.
  6. Carnivorous mammal skull ID

    I can't say, except to guess it may be from the White River formation (Oligocene). Others will be along who have more experience with skulls and can offer a more confident opinion: @jpc. However, it is a nice skull, looks like all the teeth and other parts are there. It should be a great specimen when it is fully prepped. Don
  7. Marble Mountain trilobite id

    The website is referencing only one species, Olenellus is still a valid genus. Olenellus fremonti Walcott 1910 was reclassified Mesonacis fremonti by Resser 1928. It was later reclassified "Fremontia" by Raw 1936, and many authors have applied each of these various names over the years. Fortunately Lieberman 1999 sorted it all out. "Olenellus fremonti" and "Fremontia fremonti" are synonyms of Mesonacis fremonti. Lieberman, B.S. 1999 Systematic Revision of the Olenelloidea (Trilobita, Cambrian). Peabody Museum of Natural History, Yale University Bulletin, 45:1-150 PDF LINK
  8. I am headed to Kemmerer with my son to look for fossils. I am aware of the quarries in Kemmerer and want to know if there is anything that we should not miss on our road trip or around the area. We have 5 days to explore. Thank you!
  9. Giant Tortois Osteoderm?

    You haven't been paying attention, Mike . . . Humans normally have sesamoids in their knees -- they are called patellae. We don't deal with equine medicine here, so calling a "distal sesamoid" a "navicular" is confusing and inappropriate. This is veterinarian shorthand -- a nickname for the bone based on nothing more than its perceived shape. These are equus horse naviculars in paleobiology-speak, and they are not sesamoids:
  10. Canyon Lake odd balls - Texas Cretaceous

    so here's another question for y'all. As I am an avid amateur I am trying to learn to identify what formations I am finding stuff. I had understood that if you found orbitolinas that was the zone that sea urchins would be in. I have yet to find that to be true. I have found at least four nice roadcuts with loads of orbitolina and nary a single sea urchin. Am I just particularly unlucky?
  11. Identifying layers of sediment

    You are welcome. I collected the brooks over about 12-15 years from the early 80's up to about 2005 before moving here to Austin. In all that time I think I maybe only found one or two teeth in the actual bank of the stream and that was always the lower Navesink. Every other tooth or bone fragment was sifted or surface collected off of a gravel bar, above or below the water line. I also learned to ignore the suggestions that teeth were better or more plentiful up, down or beyond any one area. Over that time I found great stuff all along the creek from well above Boundary Road to well below Hillsdale Road. The only exception was oysters and other shelly fossils which were way more plentiful closer to, and below Hillsdale. Remember the formations are all in down dip to the east so that what is high on the bank at Boundary may be at stream level near Hillsdale.
  12. Carnivorous mammal skull ID

    Could someone please help me identify this mammal skull? It has no associated geographic information.
  13. Fossil ID

    Well Dave's 64 maybe you would like to see it in person..
  14. Identifying layers of sediment

    Thank you for the article! Makes more sense now distinguishing the two & yeah I would never dig into the bank of a 40ft overhanging cliff.. not that bright of an idea, luckily those people weren’t killed. I just saw the layers along the banks and was curious which ones majority of the teeth were eroding out of.
  15. Hey everybody, My team writes math textbooks and we want to include dinosaurs in them. We're trying to find a document that states the amount of bones (approx.) in different kinds of dinosaurs. I would really appreciate your help! Thanks, Gonzalo from Uruguay
  16. Today
  17. Unidentified crocodile bones from Holzmaden

    Thanks @Natalie81 Probably my find of the year so far ...
  18. Tiny theropod tooth ID

    What a little beauty . Congratulations on your fantastic addition to your collection. Great photos too. Cheers Bobby
  19. Monster fish find - Lepidotes

    Thanks Liam and good luck! Another exceptionally rare Wealden recent find is this sauropod tooth. It's nice to have the original surface detail preserved so nicely. Similar to camarasaurid and diplodocid type teeth.
  20. This one is small. My son is curious to know if you can help us ID the long fossil with the tiny legs. He was wondering if it could be some kind of very small shrimp? This was found on the shores of the Potomac River in Westmoreland State Park. The beach is surrounded by high clay cliffs, and is known for an abundance of sharks teeth. The long, slender fossil in question measures approx 8 mm long.
  21. Tiny theropod tooth ID

    It was super interesting indeed. How we can associate different features of such a small tooth to a specie is pretty amazing. Thank you! Cheers.
  22. Identifying layers of sediment

    They come out of both the Navesink and Mount Laurel*/Wenonah. But there is a concentration coming from a pebbly lag deposit at the base of the Navesink. It is hard to find in outcrop. But about a dozen years ago some not so intelligent collectors IMHO tried mining back into the bank at a spot upstream of Boundary Road. The bank collapsed and nearly killed one of them. * Let me re-iterate: I heard different things from different people about the Mount Laurel. But considering those people were actual stratigraphers I was left a bit confused. But there was at least one good professional paper that strongly suggested that if present it is only intermittent lenses. And from personal observation the lithology exposed in most places below the Navesink more closely matched descriptions of the Wenonah. I'll need to find the reference and post it here. FOUND IT: https://www.researchgate.net/publication/291343086_Sedimentology_ichnology_and_paleoenvironments_of_the_Wenonah_and_Mt_Laurel_Formations_New_Jersey
  23. Can you help us ID?

    We found this fossil on the shore of the Potomac River at Fossil Beach in Westmoreland State Park, Virginia. The beach is surrounded by high clay cliffs, and is known for an abundance of sharks teeth. It appears to have a small hinge, but the contours of the lines have made it challenging for us to ID. Bivalve? Brachiopod? Can anyone share a more seasoned opinion? The rock is heavy and dense, reddish brown in color, with oval shaped pitting. The fossil impression itself measures approx 45 mm x 35 mm.
  24. Canyon Lake odd balls - Texas Cretaceous

    thanks Erich! I definitely knew about the orbitolinas, but not the concretions. Thanks everyone!
  25. researching obscure dinosaurs

    Good replicas are a fantastic tool. I have worked in education for many years and things get damaged by kids accidentally or not. Replica in my book are a must have alongside some real specimens.
  26. Fossil ID

    Howdy neighbor! I'm in E'Burg as well!
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