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A good number of Dinosaur collectors, on this Forum, have Acrocanthosaurus on their wish list and its one of the holy grail of teeth to acquire. I saw this post by Jim Kirkland and thought I would increase the drool factor. He does not state what formation it came from but have to believe its the Cedar Mountain Formation.. Enjoy His comment "Acrocanthosaurus serrations are so fine you can barely see them"

Trapped in an 18,000-pound block of quicksand now turned to stone is a hidden treasure of well-preserved Utahraptor fossils. Utahraptor ostrommaysorum is a large (around five meters or 18 feet long), feathered, predatory theropod dinosaur from Utah’s early Cretaceous (~124 million years ago). Utahraptors sported huge sickle claws on their second toes, with the largest specimen measuring at 22 cm (8.7”) long. Utahraptor is a dromaeosaurid dinosaur — popularly called “raptors” based on the Jurassic Park movie franchise shorthand for it's sickle-clawed stars. The illustration below shows the suspected setting for the origin of this amazing fossil block. Bones of an iguanodontid dinosaur that was also believed to have gotten mired in quicksand. So far bones from perhaps six individual Utahraptors have been found and they think were attracted to the quicksand mire by the easy prey and we're trapped. This block could provide evidence for pack hunting behavior in Utahraptors Funding is required to keep the project moving The setting, Utahs badlands the Cedar Mountain Formation initial discovery Sickle Claw visible More initial discoveries Jaw fragment Dentary Utahraptor Project Link to learn much more about what is going on. http://utahraptors.utahpaleo.org/#gallery

I've got a rarity to try and confirm today, folks. The seller says it's an Acrocanthosaurus tooth. It is from the Cedar Mountain fm. (if I remember correctly, tooth morphology has not been described from this formation) in Grand County, Utah. The serration density per 5mm is about 17 on the mesial side and about 15 on the distal side. Due to its possible rarity, I understand that I may have to provide more information about the tooth, so let me know if there is additional specifications needed.

A friend who lives in Moab, gave us some of the fossils she had collected in the area over the years. She said that she thinks this was found in the Cedar Mountain Formation (early Cretaceous period) - we weren't sure what exactly it was, but noticed what appears to be cell structure so wondered if it was bone. But if it IS bone, the it must be pretty weathered because it is hard to tell what bone it would be. This is a rather small piece - around 4-5 inches long by 1 inch high. Any thoughts? Thank you!

Weird reptile-like mammal species discovered amid ancient Utah dinosaur bones by David DeMille, USA Today, The Spectrum, May 30, 2018 https://www.usatoday.com/story/news/nation-now/2018/05/30/reptile-mammal-species-fossil-utah-pangea/654547002/ Scientists discover the fossilized skull of a mammal-like critter under a dinosaur’s foot in Utah — and then it gets even weirder, The Salt Lake Tribune, May 30, 2018 https://www.sltrib.com/news/education/2018/05/29/scientists-discover-the-fossilized-skull-of-a-mammal-like-critter-under-a-dinosaurs-foot-in-utah-and-then-it-gets-even-weirder/ Why you should care about this 130-million-year-old fossil The ancient find, unearthed in Utah, bridges the transition from reptiles to the beginning of mammals and changes our view of continental drift, too By Zen Vuong, USC News, May 23, 2018 https://news.usc.edu/143411/why-you-should-care-about-this-130-million-year-old-fossil/ The this paper is: Adam K. Huttenlocker; David M. Grossnickle; James I. Kirkland; Julia A. Schultz; Zhe-Xi Luo (2018). "Late-surviving stem mammal links the lowermost Cretaceous of North America and Gondwana". Nature. in press. doi:10.1038/s41586-018-0126-y. Yours, Paul H.

Does anyone know where I could find a detailed Cedar Mountain Formation of Utah Map?