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Showing results for tags 'late cretaceous'.
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Big Brook, NJ (Late Cretaceous): Rock, bone or other? Eight pictures attached.
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Hello! As I've gone through what I've collected this past summer, I'm finding really interesting things that I took home with me. These come from Niobrara County in Wyoming. I've taken pics of various angles of the fossils. Scale bar has inches (top) and cm (bottom). I'm not completely sure what some of these pieces are so any ideas or suggestions would be helpful. Thanks in advance! Set 1: Vertebral Process Is it possible to ID a process this broken up? I'm thinking it's Edmonto but really holding out for Triceratops Set 2: Triangular bone A friend sug
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Xixia Amber (Gaogou Formation, 100.5-85.8 Ma)
Barrelcactusaddict posted a gallery image in Members Gallery
From the album: Fossil Amber and Copal: Worldwide Localities
Amber Xixia Basin, Xixia County, Henan Province, China Gaogou Formation (100.5-85.8 Ma) Total Weight: 10.1 grams Overview: These pieces are all unwashed and still have an extremely fine layer of sediment; each has high clarity and rich color, many are naturally droplet-shaped, and individual measurements range from 1 to 8 millimeters in length. A few fragments of coal are also present within the lot. Prevalence, Inclusions, Botanical Source: Amber itself is quite common within the Xixia Basin, hosting China's largest amber reserves, but despite this© Kaegen Lau
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Xixia Amber (Gaogou Formation, 100.5-85.8 Ma)
Barrelcactusaddict posted a gallery image in Members Gallery
From the album: Fossil Amber and Copal: Worldwide Localities
Amber Xixia Basin, Xixia County, Henan Province, China Gaogou Formation (100.5-85.8 Ma) Total Weight: 10.1 grams Overview: These pieces are all unwashed and still have an extremely fine layer of sediment; each has high clarity and rich color, many are naturally droplet-shaped, and individual measurements range from 1 to 8 millimeters in length. A few fragments of coal are also present within the lot. Prevalence, Inclusions, Botanical Source: Amber itself is quite common within the Xixia Basin, hosting China's largest amber reserves, but despite this© Kaegen Lau
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Xixia Amber (Gaogou Formation, 100.5-85.8 Ma)
Barrelcactusaddict posted a gallery image in Members Gallery
From the album: Fossil Amber and Copal: Worldwide Localities
Amber Xixia Basin, Xixia County, Henan Province, China Gaogou Formation (100.5-85.8 Ma) Here's a close-up view taken with the aid of a BelOMO 10x loupe. Prevalence, Inclusions, Botanical Source: Amber itself is quite common within the Xixia Basin, hosting China's largest amber reserves, but despite this is very rarely seen on the market. It has also been studied very little, mostly due to the fact that biological inclusions have not been known to occur in it. An araucarian source for this amber was determined based on chemical analysis. Geological Sett© Kaegen Lau
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Xixia Amber (Gaogou Formation, 100.5-85.8 Ma)
Barrelcactusaddict posted a gallery image in Members Gallery
From the album: Fossil Amber and Copal: Worldwide Localities
Amber Xixia Basin, Xixia County, Henan Province, China Gaogou Formation (100.5-85.8 Ma) Total Weight: 10.1 grams Overview: This image shows its fluorescence under 365nm longwave UV light. These pieces are all unwashed and still have an extremely fine layer of sediment; each has high clarity and rich color, many are naturally droplet-shaped, and individual measurements range from 1 to 8 millimeters in length. A few fragments of coal are also present within the lot. Prevalence, Inclusions, Botanical Source: Amber itself is quite common within the Xixia© Kaegen Lau
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Xixia Amber (Gaogou Formation, 100.5-85.8 Ma)
Barrelcactusaddict posted a gallery image in Members Gallery
From the album: Fossil Amber and Copal: Worldwide Localities
Amber Xixia Basin, Xixia County, Henan Province, China Gaogou Formation (100.5-85.8 Ma) Several droplet-shaped pieces, selected from the 10.1 gram lot. Prevalence, Inclusions, Botanical Source: Amber itself is quite common within the Xixia Basin, hosting China's largest amber reserves, but despite this is very rarely seen on the market. It has also been studied very little, mostly due to the fact that biological inclusions have not been known to occur in it. An araucarian source for this amber was determined based on chemical analysis. Geological Setti© Kaegen Lau
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Xixia Amber (Gaogou Formation, 100.5-85.8 Ma)
Barrelcactusaddict posted a gallery image in Members Gallery
From the album: Fossil Amber and Copal: Worldwide Localities
Amber Xixia Basin, Xixia County, Henan Province, China Gaogou Formation (100.5-85.8 Ma) Total Weight: 10.1 grams Overview: These pieces are all unwashed and still have an extremely fine layer of sediment; each has high clarity and rich color, many are naturally droplet-shaped, and individual measurements range from 1 to 8 millimeters in length. A few fragments of coal are also present within the lot. Prevalence, Inclusions, Botanical Source: Amber itself is quite common within the Xixia Basin, hosting China's largest amber reserves, but despite this© Kaegen Lau
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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
- lance formation
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Dakotaraptor steini was found in a multi-species bonebed in the Hell Creek Formation and lots of questions have been raised around this material since it was described. Elements of the holotype were found to belong to a turtle (furcula) and Anzu (Tibia) and questions raised on others. To make matters worst the holotype is not available for study.. So its been shrouded in controversy. A good review of where we currently stand is presented in the attached Twitter thread
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- dakotaraptor steini
- hell creek formation
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Tiny once thought to be a Triceratops its actually a Torosaurus Paper says Tiny is the most complete Cretaceous dinosaur found in Colorado http://www.denverpost.com/2017/12/05/thornton-triceratops-torosaurus/ Current bone map provide by Joe Sertich curator Denver Museum of Nature and Science Press Release from Museum
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- colorado dinosaurs
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Dinosaur & Croc Faunal List of the Hell Creek and Lance Formations
Troodon posted a topic in Questions & Answers
Edited (12/31/22) With all of the new discoveries over the past few years there is very little out there that is current or accurate. Here is my view of the Dinosaurian/Crocodilian fauna from the Hell Creek and Lance Formation excluding Avialae. Tyrannosauridae: - Tyrannosaurus rex (Osborn 1905) - Nanotyrannus lancensis (Bakker et al. 1988) - Aublysodon mirandus (Not Valid) Alverezauridae: - Trierarhunchus prairiensis (Fowler et al. 2020) Ornithomimidae: - Struthiomimus sedens? (Marsh 1982) - Ornithomimus velox- 33 replies
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- lance formation
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New discovery of dinosaur eggshell in Japan. First discovery of Coralloidoolithus in Japan and in a late cretaceous coastal paleo-environnement. https://www.asahi.com/ajw/articles/14832964
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- late cretaceous
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Something that has been baffling me for a while is the fate of the European genera of Tyrannosauridae after the Mid Cretaceous. Multiple Tyrannosauridae genera including Proceratosaurus (Tyrannosauridae, England, Great Britain, Middle Jurassic (166 Million Years ago): ironically one of the earliest known Tyrannosauridae from the fossil record currently known), Eotyrannus (Tyrannosauridae, Wessex Formation, Isle of Wight, Early Cretaceous (136.4-125.45 Million Years ago)) and an unnamed Tyrannosauridae genera from Germany (Early Cretaceous (130.0-122.5 Million Years ago)) are known
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Hello! Looking to ID this asian theropod tooth from the late cretaceous of Bayankhongor, Mongolia that is supposedly from Alioramus sp. The serrations are quite worn for this rooted tooth and are hard to see, the entire tooth measures 60mm Below I've attached some pictures, thanks in advance!
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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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How variable are Hell Creek/Lance Formation crocodilian teeth?
Jurassicbro238 posted a topic in Questions & Answers
I've had these crocodilian teeth from Niobrara County in the Lance Formation for a while now, but I'm not sure how if its possible to ID them beyond "Crocodilian tooth." I've generally heard that the "sharp" morphology are Borealosuchus teeth and the short bulbous teeth are Brachychampsa. Is that a safe rule to follow? I've also noticed that there are some slight differences in the teeth I have (hopefully the pics make it visibile). They're small, but the two on the lower left have noticeable raised striations (not sure what to call it). However, the one on the lower right and on the top are s -
Hello! I was wondering if this is a soft tissue impression. The specimen is about 2cm long and I think the rock around it is sandstone. It was found in Niobrara County, Wyoming in the Lance Formation. I would like to know what you all think!
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Triceratops Horn
FightingUrukHaii posted a topic in Is It Real? How to Recognize Fossil Fabrications
Purchased this piece in 2018, but now have concerns about its authenticity. Main area of concern is the base of the horn where the outer layer has chipped away to reveal a white-ish interior that looks a bit like cement/plaster. There is a slight glint to the white material. Any help is much appreciated + can upload more photos if necessary! -
From Upper Campanian strata in the SE Pyrenees (Catalonia-Spain), I’ve found this piece that defies my knowledge of the zone’s invertebrates, as neither its size nor its shape fits anything I know. It seems an ostreid to me because the laminar structure and smooth surface of the shell, but the ostreids in the zone I’ve learned to ID, such as Amphidonte pyrenaicum, Amphidonte pliciferum, Pycnodonte vesicularis, Hyotissa semiplana, Agerostrea ungulata and Rastellum sp. are very different. Some details: The shell form beekite rings, as the ostreids in the
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- late cretaceous
- se pyrenees spain
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Gently cleaning a tooth from the Moroccan phosphate deposits
Maniraptora posted a topic in Fossil Preparation
Hey all. I have an Igdamanosaurus agyptiacus tooth from the Late Cretaceous (Maastrichtian Stage) phosphate deposits of Morocco’s Oulad Abdoun Basin. It has one odd little spot with a maroon-covered gunk stuck to it, which I would like to gently clean off of it. The spot is on an area with intact enamel, right next to an area without enamel. First picture shows the spot I’m referring to, second and third are random pictures of this tooth, because why not? Fossil pictures are cool. It’s 1.27 inches wide if that matters, haha. -
Hello all, I bought a collection box (rikermount) for some of my late Cretaceous belemnites (Belemnitella and Belemnella (pachybelemnella) sp.). The fossils are 70-66 million years old (to be more detailed: 70-68 and/or 70-67 mya). Just like other fossils, belemnites can be stored quite well in this kind of vitrine/case. Also good for storing some shark teeth or other fossils like (flat) plant fossils/impressions. Other collectors that have rikermounts with fossils? (perhaps a picture?)
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Hi FF, I recently bought a "raptor tooth" that came from the Kem Kem beds in Morocco. I wanted to make an information card for it in the display (it’s a gift for a young paleontologist), but the description said “These small theropod dinosaurs from the Tegana Formation have yet to be described, primarily due to lack of articulated bone material having been found in the formation." Someone told me that it was most likely from an Abelisaur (rather than a raptor), and recommended that I ask for advice on this site. I'm just trying to find out more about the fossil and the best
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Hello everyone , I have been trying to identify this fossil for a while now, nobody seems to know. This is a fin spine from the upper cretaceous (campanian) of israel. Recovered from phosphorite rich marine deposits. It reminds me of hybodontiformes, but its different as it lacks their characteristic serrations, and by that time period they should have gone extinct in the ocean. Any help would be incredible!!
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The Judith River Formation - Tooth ID, Faunal List & Localities
Troodon posted a topic in Questions & Answers
More and more dinosaur material is becoming available from the Judith River Formation. I see lots of misidentified material and some with questionable localities that might fit other deposits. I would like to summarize what I believe is currently known and published. If you see any omissions or errors, please let me know. Not a lot of good maps out there to show the formation but here are two. In general, the exposures are in North Central Montana. Horner describes the formation on the western end is near the east end of the Sweetgrass Hills (very thick about 152 meters) and- 9 replies
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- late cretaceous
- judith river formation
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