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Showing results for tags 'late cretaceous'.
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This one has me a bit stumped. It's pretty tiny. Sorry for forgetting the measuring device but its 3/8" or 9.53 mm. I've researched the heck out of it and have no hollow teeth from there let alone this small? Thanks so much!!
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I noticed this fossil in the limestone at the base of the great pyramid whilst on holiday. Reading online there are quite a few Nummulites in the rock of the pyramids themselves but not much information on larger finds and unlike the quarried and transported stone of the pyramids themselves this was seemingly part of the natural giza rock forming base around the structure. Im very much an amateur at this but out of pure interest I was wondering what you all may think of it?
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It has been some time since I posted anything of note. I'm still adjusting to my new surroundings here in Colorado but I did at least join a local Paleontological Society (WIPS) Western Interior Paleontological Society. My first field trip with the group was out to Baculite Mesa in Pueblo, CO. A location that is famous with a storied history, that is still giving up its ancient treasures. The weather here in Colorado can be touch and go at best, and our trip was almost delayed/cancelled by a late winter storm. This was our neighborhood in Denver the day before the trip. But temperatures rose fairly quickly (?) and the rain/snow abated enough for a window to open into the past. I brought the kids along on this trip. Here are the kids speeding along the ancient ocean bottom, which reverted to 4-6 inches of mud after the rain/snow. It returned to its roots you might say, and in the process my children grew 6 inches that day !! ... until dad had to scrape the sticky mud off of their shoes. 30 minutes later ?? .. yes, they were 6 inches taller once more. Screaming across the muddy ocean bottom. Here is our fearless leader Malcolm Bedell braving the mud and standing in front of one of the many "teepee buttes" that dots the landscape. These ancient methane seeps were built up by small communities of worms, bivalves, gastropods, crabs and the like. Food provided by the methane fixing bacteria at the seeps, and the communities of critters creating these limestone mounds. A closer look at one of these small communities. The baculites (mostly Baculites scotti) can be found eroding out of the shale and concretions that dot the landscape. This is how they typically present themselves at the site. It is rare, but occasionally you can find the Baculites with some of their original nacre still attached. But something to "fix" the nacre to the core is recommended. I think the wet mud helped to preserve this shell until I could return to the car and consolidate it .... the exercise was akin to lifting a shattered pane of glass lying on the ground to safety. Next time something to consolidate the nacre in the field and tin foil would be advised. The second location we moved to in the flats, was cut by many small and large arroyos, and could at times be treacherous for man and beast. This poor cow twisted it's legs on the way down into one of these arroyos (steep-sided gully) and had been lying there in the mud for some time, unable to move. These arroyos cut deeper into the Pierre Shale and most of the fossils here present themselves in hard concretions. I wasn't able to hang around for too long in this location. The cold and mud was too much for the kids and they retreated into the car. Next time I know what to look for and will be better prepared. I know next time will be more successful. Visually I know what I'm after and where to find it. The area is quite literally littered with fossils. I left most where I found them, eroding out of the muddy landscape. Next time I will explore the sides of the arroyo and bring a nice 3lb hand sledge. Here are ammonite bits .. found within eroding concretions. The desert has begun to bloom once again. Cheers, Brett
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Found this in Big Brook, NJ (Late Cretaceous Navesink Fm.). It's about 2.5 cm wide. I don't even know what phylum to put it in. My first thought was bryozoan. There is one very thorough paper on Bryozoa of the Atlantic Coastal Plain, but it has nothing to fit the bill. Looks like sponge with those big holes. Found a picture of Discopora sp. that looks very close, but that genus is not listed in PBDB anywhere in North America. Gabb thought he had something similar from NJ, but it turned out to be a sand concretion. The last picture is the underside of the specimen, which may or may not be a thin layer of shell material from a bivalve.
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Found something new to me in a marine late cretaceous site in Maryland. I would have thought it horn coral but they were long extinct. A friend suggested rudist . All help will be appreciated
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- late cretaceous
- marine
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For those interested in Dinosaurs from North America here is an excellent presentation on Oviraptorosaurs. Demonstrates how the lack of understanding of ontogeny may have impacted the number of described species. Study is ongoing but may point to multiple caenagnathids in the Hell Creek/Lance Formation. https://youtu.be/TpY9ygiG4ng
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- late cretaceous
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Big Brook, NJ. Not glass or metal. Shifted through a lot not sure of the id. If a fossil impression your specifics/details would be appreciated. Thank you.
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Went hunting my local late cretaceous severn formation marine site. Found a 5 inch piece of bone (which is large for the site. I am guessing it is a rib piece because it is a long and flat oval bone. this is a site that has alot of turtle, enchodus and some croc and mossasaur. Is there anything to distinguish one rib chunk from another
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From the album: Prae's Mosasaurs
Carinodens belgicus -
From the album: Prae's Mosasaurs
Tooth of Carinodens belgicus -
Here is my crocodilian tooth collection picture 1 Species: Alligator mississipiensis Age: 11 700 years- 2,58 million years ( Pleistocen ) Size: 3,96 centimeters Localisation: South Florida picture 2 Species: Thecachampsa americana Age: 2,6- 5,3 million years ( Pliocene ) Size: 2,69 centimeters Localisation: Polk County, Florida picture 3 and 4 Species : Maroccosuchus zennaroi Age : 48- 54 million years ( Early Eocene ) Size: 5,4 centimeters Localisation: Khourigba , Morocco Formation: Ouled Abdoun Basin picture 5, 6 and 7 Species: Deinosuchus riograndensis Age: 77- 81 million years ( Late Cretaceous) Size: 1,49 centimeters Localisation: Brewster County, Florida Formation: Aguja
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- deinosuchus riograndensis tooth
- maroccosuchus zennaroi tooth
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@pachy-pleuro-whatnot-odon and I wrote a paper on Mosasaurus hoffmannii fossils from the Moroccan Phosphates. https://www.researchgate.net/publication/357836567_Occurrence_of_Mosasaurus_hoffmannii_Mantell_1829_Squamata_Mosasauridae_in_the_Maastrichtian_Phosphates_of_Morocco https://www.aaps-journal.org/pdf/JPS.C.22.0001.pdf Abstract: Marginal tooth crowns from the hypercarnivorous marine reptile Mosasaurus hoffmannii Mantell, 1829 are reported for the first time from the Late Cretaceous (Maastrichtian) phosphates of Morocco. Fossilized remains of this species are previously known from Campanian and Maastrichtian outcrops in Europe, North America, and western Asia at a paleolatitudinal belt of 30-45°N. New fossil material originates from the Upper Couche III layer of the Oulad Abdoun Basin, south of Oued Zem, Morocco. The discovery of M. hoffmannii in Morocco extends its paleobiogeographic range south to 25°N and into the southern margin of the Mediterranean Tethys. Rempert, T.H., Vinkeles Melchers, A.P.M., Rempert, A.N., Haque, M.R., and Armstrong, A.R. (2022). Occurrence of Mosasaurus hoffmannii Mantell, 1829 (Squamata, Mosasauridae) in the Maastrichtian Phosphates of Morocco. The Journal of Paleontological Sciences, 10: 1-22. It has been fun working on this project. Great to finally see it published. Many thanks to the Editorial Board of the Journal of Paleontological Sciences and Walter Stein and Dr. John Nudds for helpful review. Excavation zone in the Sidi Chennane phosphate quarry. Lithostratigraphical units of the Sidi Chennane Phosphate Quarry; mosasaurid remains originate from the Upper Couche III layer. Mosasaurus hoffmannii Mantell, 1829, from the Moroccan phosphates. A. REMPC M0001, UCIII (Maastrichtian) layer, Oulad Abdoun Basin, Sidi Daoui, in posterior (A1), labial (A2), anterior (A3), and lingual (A4) view. B. REMPC M0002, UCIII (Maastrichtian) layer, Oulad Abdoun Basin, Sidi Chennane, in posterior (B1), labial (B2), anterior (B3), and lingual (B4) view. C. REMPC M0003, UCIII (Maastrichtian) layer, Oulad Abdoun Basin, Sidi Chennane, in posterior (C1), labial (C2), anterior (C3), and lingual (C4) view. Mosasaurus hoffmannii Mantell, 1829, from the Moroccan phosphates. D. AVM 01, UCIII (Maastrichtian) layer, Oulad Abdoun Basin, in posterior (D1), labial (D2), anterior (D3), and lingual (D4) view. Upper Couche III (Maastrichtian) layer, Oulad Abdoun Basin, Morocco. E. AVM 02, UCIII (Maastrichtian) layer, Oulad Abdoun Basin, in posterior (E1), labial (E2), anterior (E3), and lingual (E4) view. Mosasaurus hoffmannii Mantell, 1829, F. CORN 01 in anterior (F1), labial (F2), posterior (F3), and lingual (F4) view. Upper Couche III (Maastrichtian) layer, Oulad Abdoun Basin, Morocco (Image courtesy of George Corneille). Teeth from the first discovered Mosasaurus hoffmannii specimen, TM 7424, Teylers Museum, Haarlem, the Netherlands, A. in lingual view; B. in labial view showing prism faces; C. in lingual view showing indiscernible lingual facets, light serrations on the carinae, and medial tooth curvature.
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From the album: Prae's Mosasaurs
Tooth from Carinodens belgicus. -
Recently I took two friends out to go fossil hunting for the first time. It was a fun trip with cool finds, and one of those finds is a little bizarre. It's a late cretaceous bone (Ozan formation) from central texas, covered in pyrite. It almost reminds me of a broken scapula. Any thoughts? Sorry for the lack of measurements, I only have field photos.
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My first thought was that this was another piece of turtle which is common in the area, but when I looked at it again it is seems to be curved in to many ways. The "coral" growing on one edge is also unusual for the area-- i dont know what that reflects either. I will much appreciate help in understanding what I am looking at.
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- turtle?
- plesiosaur?
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From the album: Prae's Mosasaurs
Carinodens belgicus. The corn-kernel toothed mosasaur.-
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Big Brook - New Jersey: Marlboro. Is this a root, rock or mosasaur? Edges where you would expect it. Forgive the dirty nails came from the brook.
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- big brook nj
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- verterba
- late cretaceous
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Soto-Acuña, Sergio; Vargas, Alexander O.; Kaluza, Jonatan; Leppe, Marcelo A.; Botelho, Joao F.; Palma-Liberona, José; Simon-Gutstein, Carolina; Fernández, Roy A.; Ortiz, Héctor; Milla, Verónica; Aravena, Bárbara, 2021. Bizarre tail weaponry in a transitional ankylosaur from subantarctic Chile. Nature: 1–5. doi:10.1038/s41586-021-04147-1. ISSN 1476-4687. Links: This bizarre armored dinosaur had a uniquely bladed tail weapon (nationalgeographic.com) This Dinosaur Found in Chile Had a Battle Ax for a Tail - The New York Times (nytimes.com) Stegouros is quite unusual for ankylosaurs in that it had a tail whose armor is reminiscent of war clubs used by the Aztecs and Hawaiians, in sharp contrast to ankylosaurids having tail clubs similar to maces used by medieval knights. Moreover, the authors of the Stegouros paper recover this taxon along with Antarctopelta and Kunbarrasaurus in a distinct ankylosaur clade basal to Nodosauridae and Ankylosauridae, which they named Ankylosauria.
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Hi, I'm looking for a nice example of a Spinosaurus tooth for a gift to a Spinosaurus lover. I'm not quite sure the best place to look, but I did find this one coming up in an auction. I wondered if anyone would be willing to offer an opinion on this one? Thank you!
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- spinosaurus
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You're not going to believe your eyes, but a new jaw-dropping paper is available online: de Souza GA, Soares MB, Weinschütz LC, Wilner E, Lopes RT, de Araújo OM, Kellner AW (2021). The first edentulous ceratosaur from South America. Scientific Reports 11 (1): Article number 22281. doi:10.1038/s41598-021-01312-4. The discovery of Berthasaura reveals that not all ceratosaurs from the Late Cretaceous had teeth, because the jaws of Berthasaura lacked teeth. The Asian elaphrosaurine Limusaurus is also toothless, but the Late Cretaceous age of Berthasaura shows that some toothless noasaurids survived into the Late Cretaceous. The recovery of Berthasaura in a basal position within Noasauridae rather in a derived position might be affected by the absence of foot bones in the holotype and the percentage of missing morphological data for Deltadromeus because Berthasaurus is younger than Deltadromeus and other members of Elaphrosaurinae.
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Hinoshima formation, Cretaceous (Santonian), Japan
David in Japan posted a topic in Fossil Hunting Trips
2 weeks ago, I surface hunted fossils at my favorite spot in Kumamoto Prefecture, Japan. It was a very hot day of November and as I was alone and had plenty of time, I have been able to return to several spots (same formation though) I do not often go to. As usual, as the places I went are part of a national park, you are not allowed to take fossils directly from the formation however you can still take back rocks that felt from the cliff or which lies on the beach. I first stopped at Kojima's camp site. Kojima is a very small island (the name Kojima means small island in Japanese) that was transformed in a small camp site. Before being transformed into a touristic spot, the place yielded lots of late cretaceous sharks teeth and heteromorphs ammonite unfortunately, the rich fossil layers has been covered in concrete and it is hard now to find teeth there. I walked around the island and despite the fact I didn’t find any tooth, I found a bunch of Inoceramus (Platyceramus) higoensis and fossils of Sea Urchins however I wasn’t as lucky as my new little friend as didn’t bring anything back from from this specific location.- 8 replies
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Hi TFF friends, it's been a while. I hope you're all fine. This week, I explored my favorite place in Kumamoto prefecture (trip report coming these week-end) and found the following fossil. First time I saw such fossil from this location. I have browsed the literature related to this location but I unfortunately didn't find any clues about what this fossil could be. I suspect this could be some kind of fish tooth. In the all the papers I read about this location, I found some mentions of fish material found there but no description or further information. I was wondering if this could be some kind of Pycnodont tooth, the general shape matches and we can see in cross section the kind of fold where the root is missing. However the regular grooves on the surface makes me doubt about my guess a little bit as I think that Pycnodont tooth are "smooth" . If any one has a guess about what it could be, do not hesitate to throw it in the comments. Any help is welcome. Size: 8mm by 3mm Himenoura Formation (lower) Late Cretaceous (Santonian) Kumamoto prefecture, Japan
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Hi everyone! I recently found a trace fossil near my house. I live in Southeast Colorado Springs and there's a lot of marine fossils near where I live. I found what I believe is an ammonite trace fossil. I'm having some trouble identifying it though. I'm not exactly sure what ammonite it's from as well as what formation it's from and what type of stone it's in. I brought it in to the museum I volunteer at and it was determined by the curator that it is not sandstone and it's most likely from the Late Cretaceous. I think it might be from a Hoploscaphites cheyennensis in silt-stone from maybe the Pierre Shale formation(?) but I don't know! The rock is slightly porous, if that helps. Help would be appreciated! Thanks!
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- colorado springs
- trace fossil
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