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Showing results for tags 'niobrara chalk'.
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Howdy all, Seller says that this might be a from a pterosaur, is that accurate? (Niobrara chalk)
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Found these three rocks in an outcropping of Niobrara Chalk in Southeast SD. I suspect they are sponges or coral of some kind. Pics 2&3 are both roughly the diameter of a penny, pic 1 is probably 20% larger. ID would be greatly appreciated!
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Actually a Polycotylid Vertebra?
Opabinia Blues posted a topic in Is It Real? How to Recognize Fossil Fabrications
Not sure if this goes here or in Fossil ID but I’ll post here… This is one of my latest online purchases, and one I had to snag because if this is what it’s supposed to be it’s a neat piece. But seeing as I can’t personally verify it myself, I thought I’d post here. This vertebra was being sold as Trinacromerum sp. While I doubt that just a centrum like this is identifiable down to genus, I would like to know whether or not this really is a Polycotilid vertebra. I think it’s likely because it’s a very sizable bone that’s not mosasaur, but just want to check. This fossil is, according to the seller, from the Niobrara Chalk of Kansas. And as can be seen, this fossils as pretty obviously been flattened by geology. Thanks!
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Hi everyone, I just ordered this beautiful vertebra found in the Niobrara Chalk of Kansas (Cretaceous, 87 - 82 mya) for quite a bargain. Unfortunalty I don't have any precise location as where it was found, for that I am going to contact the seller. The vertebra was listed as being Mosasaur which it could very well be, but since it is a little bit distorted I am not quite sure, especially since many other critters can be found in the Niobrara Chalk. So I was hoping on the expertise of some of our members here who have more knowledge of Cretaceous verts and of Kansas fossils. @KansasFossilHunter @Troodon @LordTrilobite @pachy-pleuro-whatnot-odon @The Amateur Paleontologist you guys might be able to shed some more light on the piece? Thank you in advance! Topic might be more usefull with some pics, so here they are.
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(Posted in SD forum as well, feel free to move) I thought this would be an appropriate addition- my hope is that this map will allow forum users to plan trips to SD! Threw this thing together for you guys in some spare time at work. The map shows the extent of common fossil bearing strata in the state of South Dakota, as well as some "no-go" areas- reservations and the like. If you guys want a certain area zoomed in on let me know! FossilsSD.pdf
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A super cool addition to our programs- A Pterosaur BONE !!
fossilsonwheels posted a topic in Member Collections
I am pretty much giddy right now because we were able to make a significant addition to our program. We are acquiring a partial Pterosaur wing bone from the Niobrara Chalk. It was sold as a Pteranodon which is what we will go with for the program though the actual ID is probably more accurately stated as Pterosaur indet. What makes this important to us is this gives us something other than a few small Kem Kem teeth to represent Pterosaurs in our programs and this also gives us another touch fossil that kids will really love. As we learned last spring, kids love Pterosaurs and it is q shock to many of them when we tell them that they were not dinosaurs. I think getting to touch a real Pterosaur wing bone will offset that shock quite a bit. This is also a huge fossil for us in that it helps us add to a section of the 4th grade Dinosaur program that we recently decided to add. We want to spend a little time on the Western Interior Seaway. It helps us paint a more accurate picture of what the US looked like at that time and helps us give a more in-depth record of what non-dinosaur creatures ruled the sea and sky when dinos ruled the land. So here it is, a partial 12" section of Pterosaur wing from Cretaceous Kansas.thumb.jpg.ce29f38c8eba4185c1eb0e31838aad26.jpg)
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Hi all, This was found by my brother at he Niobrara chalk earlier in W Kansas. I have no idea what it is, so could you all help? I am thinking it is a bone fragment of some kind although it has the general shape of a limpet.
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Hi all, I recently was able to briefly visit the Niobrara chalk beds of western Kansas. However, I know almost nothing about Cretaceous life. I attached a picture of something that may be an iron concretion, but it’s small, disc-like shape made me think twice. I want to see what you all think. Next to the object are several ichthyodectes caudal vertebrae (that’s what I think they are anyway). Thanks as always!!
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I just recently got back from a short trip to the Niobrara chalk formation and I need help preparing some partial fish fossils. Many of the bones are covered in chalk and they are extremely fragile. How should I clear matrix stuck to the bone without ripping off the bone itself? The one piece I am especially concerned about is a jaw bone that has chalk in between the individual teeth. I would really appreciate it if you told me how you would tackle this situation. Thanks in advance.
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Since it's SOOOO cold here in the Midwest and I can't get out, I finally got around to prepping one of the pile of jackets I have in my basement that we've collected in the Niobrara Chalk of Kansas over the years. This is a small Protosphyreana pectoral fin. It's just over a foot long. (We have others that are over 3 feet long.) Protosphyreana is a swordfish-type critter that is mostly known from its serrated pectoral fins and its rostrum. This specimen was collected in 2002. The tip is missing as that was what was weathering out. A bonus was the scapulo-coracoid (shoulder girdle) was associated with the fin as well as a skull fragment. I neglected to take photos at the beginning of the process, so what I didn't document was the removal of the rock covering the fossil and the cutting down of the jacket. What is documented is the cut down jacket with plaster poured around it to make a rectangular display. The tip is reconstructed with plaster and painted to match the bone. Finally, the plaster is "painted" with dissolved chalk that makes it look like it's a piece of chalk rather than plaster. http://oceansofkansas.com/Protosphyr.html
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