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  1. Paper by Phil Mannion et al. that supports the validity of the 24 recognized Sauropod species in the Morrison Formation. Some authors have suggested this number is well overestimated and represent growth series. https://royalsocietypublishing.org/doi/10.1098/rsos.210377
  2. Hi Everyone - I came across this Camarasaurus vertebra and was curious how much restoration has been done to it. I'm trying to train my eye for Morrison Formation material which can be a little tricky . Camarasaurus Tail Vertebrae Jurassic (145 Million – 155 Million Years Ago) Morrison Formation - Wyoming 4 1/4" long Thanks for taking a look!
  3. Quick guide to help identify a few Sauropod teeth from the Morrison Formation. Corrections and additional info always appreciated Please Note: Variations in the morphology of these teeth can vary significantly do to, species, jaw position and ontogenetic changes. This is just a high level guide. Camarasaurus: - Crown is wider than the root - Anterior Teeth are spoon-like and symmetrical, mid and posterior teeth are asymmetrical - The crown enamel ends sharply where the root begins - Wear facet, if present, can be on both sides of the tip
  4. Billymachi

    Animal or Vegetable?

    This is a rock shop purchase. The owner is an expert in dinosaur gembone from the Morrison. He also deals in Hermanophyton ferns, etc so he also knows a bit about paleobotany. But this piece was a mystery to him. Its very well agatized and the fine details are preserved. At first it looks like a limb cast. The exterior is coarsely wrinkled, like bark. The cross-section does not preserve a convincing ring of a bark layer, but there is some kind of concentric character. It has some characteristics of a limb bone. The geometry and size fit that t
  5. Spinodude

    Morrison Formation toe ID

    Got a bit of a potential challenge here today! I recently bought this little toe bone (phalanx or metatarsal I guess) online. It was cheap, I guess because it doesn't have anything in terms of location/age other than Morrison Formation. It is about 6 cm long, 6-ish on its widest point and about 5 high at the highest point. It is quite heavy and stubby. Slightly distorted at the front and the circular parts at the front are partially worn off. Has a piece knocked out of it. Which is kind of neat because you can see the internal bone structure in that part. But the main question of c
  6. Hi, this just arrived along with a few other teeth, and I was wondering if it was possible to identify which species it could be. It’s a Crocodile indet. tooth from the Morrison Formation Is all I know. Thank you for any reply’s
  7. Here is some of my first 6 months of fossil collection ! ( some still in transit oversea ...) First of all I really enjoy spending time in this forum and I feel very lucky to be member of this forum ! some of my collection was ID by you guys Soooo...LET get started ! KEM KEM the mystery - My First Dinosaur fossil .... Abelisauridae tooth ! MY BEST theropod tooth in my collection ! My Mystery vertebra from Kem kem ... possible Theropod vertebra Sauropod tooth << Rebbachisaurus tooth from kem kem
  8. Back In Time: Fremont County farmer discovered multiple dinosaur fossils in Garden Park https://www.canoncitydailyrecord.com/2020/11/22/back-in-time-fremont-county-farmer-discovered-multiple-dinosaur-fossils-in-garden-park/ https://www.newsbreak.com/news/2107473763723/back-in-time-fremont-county-farmer-discovered-multiple-dinosaur-fossils-in-garden-park Carpenter, K., 2002. Guide to the major dinosaur sites near Cañon City, Colorado. Trilobite Tails, 19(3), pp.7-17. https://www.researchgate.net/publication/314891708_Guide_to_the_major_dinosaur_sites_near_
  9. Since I live so close to the famous Morrison Formation I thought I would start doing some research on what it's like to fossil collect in it because I'm seriously considering finding a way to gain access to some private land and do a little bit of collecting. I have heard it said once that the rock of the Morrison is hard and requires special tools to dig in, and that consequently it's impossible to prospect for fossils in the Morrison the same way you would in, say, the Hell Creek Formation. How true is this? Is the only way to fossil collect in the Morrison to be in a quarry? My
  10. Found in New Mexico on private property, not far from Morrison Formation...Circled in red highlighter is what appears to be a talon...last photo is of the opposite side..
  11. Is possible a diplodocus tooth from the market, to belong to genera like Seismosaurus (yes i know, Seismosaurus now is the Diplodocus hallorum), Amphicoelias, Supersaurus or other diplodocid largest and more "exotic" than the common Diplodocus?
  12. Hi all, I have 3 teeth here I need help with The first is a Stegosaurus tooth: It comes from Wyoming, USA. Morrison Formation. It looks like a Stego tooth to me in terms of size and morphology, based off this thread > --- Next, a supposed Barosaurus tooth: It comes from Sundance, Wyoming. Morrison Formation. I cannot find any good literature on Barosaurus teeth. This tooth doesn't seem to have the spade-like shape I usually associate with Camarasaurus teeth. --- Lastly, there is a sauropod toot
  13. lone5wolf117

    Sauropod tooth ID

    Hello lately i have this sauropod tooth from morrison formation, size is 15/32″ what sauropod would it be form?
  14. Paleostoric

    Stegosaurus Tooth?

    I acquired this tooth some years ago, and it was labeled as a stegosaurus tooth. However, I am having some difficulties distinguishing if it indeed comes from a stegosaurus or perhaps an ankylosaur or nodosaur. It comes from the Morrison Formation of Wyoming. Each tick mark on the last pic is a mm. What do you all think? Thanks!
  15. I took these photos of a replica of the Allosaurus jimmadseni specimen "Big Al 2" at the Lewis Science Center in Orange Coast College earlier this year. Like the referred A. jimmadseni specimen "Big Al", it was excavated at Howe Quarry in Wyoming in the 1990s.
  16. Morrison Formation yields remains of predatory insect. Utah State Parks Blog, Vernal, Utah https://stateparks.utah.gov/2020/05/20/famous-dinosaur-producing-rocks-in-utah-yield-fossil-of-large-predatory-insect/ Jurassic bug: Researchers find 151-million-year-old Morrisonnepa Jurassica insect fossil in Utah by Jordan Culver, USA TODAY, May 22, 2020 https://www.usatoday.com/story/news/nation/2020/05/21/morrisonnepa-jurassica-151-million-year-old-bug-fossil-utah/5234187002/ the paper is: Lara, M.B., Foster, J.R., Kirkland, J.I. and How
  17. Foster, J., Pagnac, D. and Hunt-Foster, R., 2020. An unusually diverse northern biota from the Morrison Formation (Upper Jurassic), Black Hills, Wyoming. Geology of the Intermountain West, 7, pp.29-67. DOI: https://doi.org/10.31711/giw.v7.pp29-67 https://giw.utahgeology.org/giw/index.php/GIW/article/view/69 PDF: https://giw.utahgeology.org/giw/index.php/GIW/article/view/69/87 Yours, Paul H.
  18. Coltonsrocks

    Dinosaur Bone

    My family owned private land near garden park in Canon City, Colorado. This is a couple of pieces that were found there. I'm just curious on what body part they may be.
  19. There is a revised edition of John Foster's book Jurassic West: The Dinosaurs of the Morrison Formation and Their World coming out this fall: https://www.amazon.com/gp/product/0253051576/ref=crt_ewc_title_dp_1?ie=UTF8&psc=1&smid=ATVPDKIKX0DER When this volume is released, it will include updates to knowledge of Morrison tetrapods, including the renaming of Amphicoelias fragillimus as Maraapunisaurus, the renaming of Stegosaurus longispinus as Alcovasaurus, the renaming of Diplodocus hayi as Galeamopus, the reclassification of Diablophis as a basal snake, the ren
  20. An interesting article that discusses the “Golden Age” of sauropods, the Morrison Formation is reported to have yielded 13 genera and 24 species of sauropods. For collectors makes identification of teeth a pretty daunting task... Paper. https://giw.utahgeology.org/giw/index.php/GIW/article/view/42
  21. Hi, I saw this tooth for sale and i am wondering if it looks like it could be a Ceratosaurus tooth. I read something about Ceratosaurus teeth having vertical ridges on the inner crown so i think it could possibly be a good match. It is .75 inches long and comes from the Morrison Formation in Wyoming. Thanks.
  22. I have found this crinoid ossicle from the Morrison Formation seems to be agatized alot like the bone from the formation does anyone know of any others found from the Morrison? have looked online but cant find anything even articles talking about it.
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