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Showing results for tags 'smoky hill chalk'.
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I’ve had these three Ptychodus teeth for awhile but hadn’t made any serious attempts at ID. I’m finally starting to work on the Ptychodus display though so it’s probably time to ID them. They are all Niobrara Chalk teeth. 2 from Smoky Hill, 1 Fort Hays Limestone. First up is the Fort Hayes tooth. Roughly 6mm wide so quite small and very flat crown. It does appear to have a circular pattern so I thought perhaps polygyrus/marginalis but I’m not at all confident in that as an ID.
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Identification Cretoxyrhina teeth are simple in design, having a triangular crown with smooth enamel and non-serrate edges, a thin lingual dental band, rounded root lobes, a lingual root protuberance, and no nutrient groove.1,2 Comments This tooth is from a latero-posterior position, given the crown's distal curvature. The chalk preserved this tooth very well - the enamel retains a sharp gloss comparable to that on modern sharks' teeth. References 1. Bourdon, Jim, and Michael J. Everhart. “Analysis of an Associated Cretoxyrhina Mantelli Dentition from the Late Cretaceous (Smoky Hill Chalk, Late Coniacian) of Western Kansas.” Transactions of the Kansas Academy of Science (1903-), vol. 114, no. 1/2, 2011, pp. 15–32. JSTOR, http://www.jstor.org/stable/41309622. 2. Shimada, Kenshu. “Dentition of the Late Cretaceous Lamniform Shark, Cretoxyrhina Mantelli, from the Niobrara Chalk of Kansas.” Journal of Vertebrate Paleontology, vol. 17, no. 2, 1997, pp. 269–79. JSTOR, http://www.jstor.org/stable/4523806.
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- c(n)cm1
- cretoxyrhina
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I have recently found this fossil in north western Kansas (graham co.) I don't know if this is a shark vertebrae/cartilage disk or just a basic fish vertebrae. (Don't mind my bad prep work. I just started peeping fossils recently.)
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I found this Ptychodus marginalis on a sandbar on a river this spring after a large flood. The river cuts through the lower Smoky Hill Chalk of Northwest Kansas. After I picked it up, I asked myself "is this real?" It is!!! 54mm across.
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- ptychodus
- sharks teeth
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From the album: Sharks
A gorgeous tooth from one of my favorite sharks! The enamel isn't polished - the chalk preserves its shine extremely well - it's as shiny as when it fell out of the animal's mouth! -
From the album: Sharks
A beautiful tooth from one of my favorite sharks. This one is extra special because of the self-inflicted bite mark - a gash seen on the left in lingual view. Apparently their bite was strong enough to cut their own teeth! -
From the album: Kansas Cretaceous
5mm long Collected in the Niobrara Chalk in Northeast Lane Co. KS. Suggestions/corrections on the ID are welcome© Isaac Fox
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From the album: Kansas Cretaceous
44mm long. Collected in the Smoky Hill Chalk in Northeast Lane Co. KS© Isaac Fox
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From the album: Kansas Cretaceous
63mm long. Collected in the Smoky Hill Chalk in Northeast Lane Co. KS© Isaac Fox
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From the album: Kansas Cretaceous
25mm long Collected in the Smoky Hill Chalk in Northeast Lane Co. KS© Isaac Fox
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From the album: Kansas Cretaceous
27mm across the disk Collected in the Smoky Hill Chalk in Northeast Lane Co. KS© Isaac Fox
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From the album: Kansas Cretaceous
27mm across the disk Collected in the Smoky Hill Chalk in Northeast Lane Co. KS© Isaac Fox
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From the album: Kansas Cretaceous
12mm on the slant Collected in the Smoky Hill Chalk in Northeast Lane Co. KS© Isaac Fox
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From the album: Kansas Cretaceous
33mm on the slant Collected in the Smoky Hill Chalk in Northeast Lane Co. KS© Isaac Fox
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From the album: Kansas Cretaceous
12mm across the root Collected in the Smoky Hill Chalk in Northeast Lane Co. KS© Isaac Fox
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From the album: Kansas Cretaceous
11mm on the slant Collected in the Smoky Hill Chalk in Northeast Lane Co. KS© Isaac Fox
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From the album: Kansas Cretaceous
15mm on the slant Collected in the Smoky Hill Chalk in Northeast Lane Co. KS© Isaac Fox
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From the album: Kansas Cretaceous
15mm on the slant Collected in the Smoky Hill Chalk in Northeast Lane Co. KS© Isaac Fox
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From the album: Kansas Cretaceous
20mm on the slant Collected in the Smoky Hill Chalk in Northeast Lane Co. KS© Isaac Fox
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These were all collected last summer, from the Smoky Hill Chalk in Northeast Lane County Kansas. Any help/suggestions/corrections would be much appreciated. 1 12mm Long Enchodus? 2 13mm Long Enchodus? 3 20mm across Gillicus arcuatus? 4 Entire piece put together totals 48mm in length. Not sure on the genus. Better pictures to come. 5 29mm long Stratodus? Seems to bear some resemblance to strato2.jpg (790×562) (oceansofkansas.com). The other possibility I thought of was a damaged Cimolichthys. 6 12mm across Perhaps a member of the Plethodidae family 7 20mm long Apsopelix? 8 3 out of 4 associated vertebrae. All about 11mm across x 11mm long 9 Group of associated vertebrae. All approximately 12mm across long way I expect Pachyrhizodus. I've got a couple more, but it seems I need to re-take the pictures of them.
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From the album: Kansas Cretaceous
30mm long. Collected in the Niobrara Chalk in Northeast Lane Co. KS© Isaac Fox
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We have been collecting for our first year 4H exhibit. These were all collected in Kansas in the Smoky Hill Chalk and also in Southeast Kansas around Greenwood, Elk, and Chataqua counties. We are looking for some concensus on our identification. We have had a hard time this year due to Covid. When we used to do this 15 years ago we would go to big meetings where we would get help identifying things. This year it was all identified on site and the leaders were very busy helping many people as best they could. As you can see we have already caught quite a few errors ourselves so we are pretty reluctant on the others. I couldn't get my camera to focus on the label and specimen at the same time so sorry for the fuzzy labels. I am helping my neice with her project. She is 7 and just learning about geology but has been picking up rocks and bringing them home for years. Seems like shark teeth are her favorite like alot of others here on the forum. We really want to get east in Kansas and find some carboniferous stuff.
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Identification: ginsu teeth have broad lingual dental bands, rounded root lobes, a strong lingual protuberance in the roots of anterior teeth, smooth crown faces, and no nutrient groove. Notes: Has damage on the lingual side, perhaps a self-inflicted gash as the tooth fell out of the mouth. Otherwise, a perfect tooth with a very sharp point.
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- c(n)cm2
- cretaceous
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From the album: Sharks
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- cretoxyrhina mantelli
- ginsu shark
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