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New mosasaur species named from the Pierre Shale of North Dakota: Jormungandr walhallaensis
pachy-pleuro-whatnot-odon posted a topic in Fossil News
A new mosasaur, related to the genus Clidastes, has been described from the Middle Campanian Pembina Member of the Pierre Shale Formation of North Dakota near the town of Walhalla and has been given the undeniably cool name of Jormungandr walhallaensis, after the world serpent of Norse mythology! Zietlow, Boyd and Van Vranken, 2023. Jormungandr walhallaensis: a new mosasaurine (Squamata: Mosasauroidae) from the Pierre Shale Formation (Pembina Member: Middle Campanian) of North Dakota. -
Hoploscaphites nodosus. 72.94 +- 0.45 million years old. Cretaceous period, Campanian age.
Samuel M posted a topic in Paleo Re-creations
Linked is a 3D model of a nearly perfect Hoploscaphites nodosus ammonite. Models can be viewed using this website: Online 3D Viewer or through other software. This is a 3D model of an actual fossil and is not a "recreation", but since my last upload was moved here this is where I will upload the rest of my 3D scans. If anyone else has any good ammonite or inoceramus finds from Colorado please share them with me and tell me a little about them. I've been reading some of Bill Cobban's papers about the invertebrate paleontology of Colorado and I've gotten really interested in what can be found around here. Thanks! -Sam 1195980117_Hoploscaphitesnodosus-Kprl(1)-1.glb -
One week fossil collecting trip out west, my sixth time in the past six years. Flew into Denver. Rented a car and headed down to Castle Rock where I spent the night at a motel. Next day drove up to Florissant Fossil Quarry. It was Wednesday and they're normally closed during the week in September, but I made special arrangements for a few hours visit. Compared to my two previous visits there, didn't do as well. The other times, I was there for the whole day, this time was just for three hours, and they had had a considerable amount of rain recently and so the shale was more crumbly and more difficult to split. Here are some of my finds. Plants:
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Hello! I am trying to clean this beautiful mosasaur pictured below, but I am really struggling with some old paleobond thats already been used on it. I have been somewhat successful with using a liberal amount of acetone on the bone, which I scrub in with a toothbrush. This has worked, but there are certain regions where the the glue was used on gypsum crystals and model clay, which has effectively cemented the bones of the lower jaw together. I've also been using a regular paleoarrow. My goal here is to get it as clean as possible, NOT to specifically separate the natural occlusion of the teeth. The plan is to display it at a museum (Also, any wild guesses as to the genus of this pretty lady? I was thinking latoplatecarpus)
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Was wondering which plesiosaur species it might come from. Pierre shale sd 2ft by 2ft. It was broken before fossilizing also encrusted in crystals. Some parts are only .5in thin. Wasn't sure if it was worth picking up. It's a complete rear pelvis. Found verts and other leg bones by it. It was facing up like in photo. But not sure which side is which when it was alive. Bottom point is where it attaches to leg. The bottom of the nob on the left also looks like it was attached to something. As it shows cartilage remains. Maybe it attached to other side pelvis? I tried using this page to id it.
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Wondering if the species can be ID. Found in Pierre shale SD. Both teeth were touching the pointy bone. Is that a jaw? Also I put a b72 alternative on them but it sometimes leaves a white film on it which you can see in the photos. Is there a way to avoid this? Thanks!
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The first mosasaur tooth I found in Pierre shale sd. 2in long poorly preserved. Was wondering if it was a shedded tooth or part of jaw? Also what species might it be? thanks!
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What could of made this? Thanks! I mostly find mosasaur pieces but never found anything this cool before. Was in a creek so not sure where it came from. But SD Pierre shale formation is around the area. 2in long. I haven't cleaned it yet.
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Found these 3 fossils 1ft apart from each other at bottom of a hill. Are the 2 vertebrae from the same area of the body as the mosasaur paddle arm bone? What's the chance this is all from same 1 animal? If so I might try looking for where they came from. Is there a technique to removing a side of a hill to find the source? Thanks
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Was wondering if this spine is from a plesiosaur or mosasaur. and is it a neck, tail or trunk spine? Found poorly preserved in Pierre shale sd. There are a few ribs there too. The reddish end pic is where I did a clean break form some more of the fossil which is in different jacket. I roughly cleaned this spine but don't think it's worth putting more time into with all the gypsum.
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Found this unusual broken bone in Pierre shale with a vert right by it. Where on the mosasaur body might it have come from? Thanks!
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Found this big bone with a mosasaur vertebrae near by in Pierre shale. This is the biggest mosasaur single bone I've found. Is poorly preserved and started to weather. Is there enough to tell if it's femur or humerus? I compared it with other mosasaur but couldn't find any that were this round. What species might it be? Thanks
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Found what looks like fish jaw with tooth and skeleton. There are many pieces of this fossil but only showing part with jaw. Was found poorly preserved in Pierre shale SD. Wondering which fish species it might be? Thanks!
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Found in Pierre shale in Sd. Might be from a concretion. the 2 parts are not from same creature it seems. Was also wondering what species it could be? Thanks
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From the album: Cephalopods from Cretaceous Colorado
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From the album: Cephalopods from Cretaceous Colorado
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From the album: Cephalopods from Cretaceous Colorado
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From the album: Cephalopods from Cretaceous Colorado
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From the album: Cephalopods from Cretaceous Colorado
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From the album: Cephalopods from Cretaceous Colorado
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From the album: Cephalopods from Cretaceous Colorado
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Inoceramus valve resting on top of a Placenticeras ammonite
rawfossils posted a topic in Member Collections
A cool piece frozen in time from the day they were buried together. Also a decent size Inoceramus shell for the area and always fun to find an ammonite. This piece is from Boulder, Colorado. -
From the Pierre Shale of Fort Collins. Found next to a lot of Inoceramus bivalves not too often you see something like this. I initially believed it was a branch of wood that was buried but I'm thinking it could be a rib bone most likely from a mosasaurus. Any feedback is appreciated just thought someone should look at it.
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Today I was cleaning the baculites found on the last fossil trip, and found one VERY cool one. This segment looks to have clear and deep tooth holes in it. It is believed that mosasaurs fed on baculites, and the hole sizes would certainly agree with that.