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Showing results for tags 'late cretaceous'.
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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 thi
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- invertebrate
- porifera
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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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- eocene
- mokattam formation
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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
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- baculites
- western interior palentological society
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The Two Medicine Formation is a late Cretaceous geological formation that was primarily deposited in North Central Montana 84 to 71 million years ago about the same time as the Judith River Formation, See Map - pink area. The Two Medicine is found along the east flank of the Rocky Mountains and represents the upland area of the Cretaceous Seaway while the Judith River Formation represents the lowland area. Although deposited in the roughly the same period the Two Medicine has yielded an amazing list of dinosaurs that are not found in the Judith River. These include Einiosaurus procurvicornis,
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- two medicine formation
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Identifying Theropod Teeth from the Judith River/Two Med Formations
Troodon posted a topic in General Fossil Discussion
Identification of theropod teeth from the Judith River and Two Medicine formation is always a challenge even for the more experienced collector. Sellers whether its a dealer or auction site also struggle with identifications and sometimes just shotgun it. So I decided to put this together as an quick aide in providing you some information. Among the sources used is the reference book Dinosaur Systematics by Ken Carpenter and Phillip Currie... its an excellent reference source. This aide is for the more common teeth collected and sold, not for more obscure theropods. I'm sure mistakes/omissions- 6 replies
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- campanian
- late cretaceous
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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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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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- oviraptorosaurs
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My advice to any collector who is interested in dinosaurs is to become as much an expert as possible and do not rely solely on others for identification. One way to do so is to start a library of good reference books and pdf papers. This topic will focus on BOOKS There are a few must have books, if you're interested in TEETH and in my opinion this is the bible for North American ones. Dinosaur Systematics Approaches and Perspectives by Carpenter & Currie Addresses : 1)Chapter with detailed illustrations and ID guide of the teeth of Alberta's theropod's that are basical
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Got another one than has me stumped from the Lance in Wyoming… any ideas guys? Thanks!
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My Jurassic Park - The Judith River Formation (Montana)
Troodon posted a topic in Member Collections
The Judith River Formation is a late Cretaceous geological formation that was primarily deposited in North Central Montana 80 to 75 million years ago about the same time as the Two Medicine Formation, See Map - Large meandering rivers flowing into the Intercontinental Cretaceous Seaway deposited the Formation. Much of the area was very flat, with swamps and bogs, much like today's southern Louisiana. Dinosaurs included Tyrannosaurs, the duck-bills hadrosaur Brachylophosaurus was the most common found, Ceratopsian included Avaceratops and smaller theropods like Tr- 78 replies
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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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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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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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- late cretaceous
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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-
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- cretaceous
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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 speci- 7 replies
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- squamata
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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 Ab
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- aguja fm
- late cretaceous
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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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From the album: Prae's Mosasaurs
Tooth from Carinodens belgicus.-
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From the album: Prae's Mosasaurs
Carinodens belgicus. The corn-kernel toothed mosasaur.-
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It's from Kansas and is Late Cretaceous age.
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Updated 1/17/20 I've taken a pretty firm position on the validity of Nanotyrannus ever since I spent some time looking at the Dueling Dinosaurs shortly after they were discovered. Subsequent to that, new information that I've become aware of just cemented my position. I'm interested in understanding the "truth" and have no problem looking at all available specimens that are in private hands or museums. The optics are very clear to me and I have difficulty understanding the debate. Collectors need to form their own opinion on this but I would like to share with you why I beli
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- lance formation
- nanotyrannus lancensis
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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 unus
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- ankylosaur
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There are two Tyrannosaurs described in the Hell Creek & Lance Formations, Tyrannosaurus rex and Nanotyrannus lancensis. Teeth from these animals are the number one sought after and coveted item by collectors. I don't understand all the hoopla and prices they command since my friends who I collect with know that I'm not a tooth person and prefer bones and claws. However I've been fortunate to find and acquire a few teeth and will post a several of my nicer ones. My two most favorite T-rex teeth are my biggest and smallest: The Baby (one of the rarest teeth around) is 1 1/8" and w
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- late cretaceous
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