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Showing results for tags 'cretaceou'.
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Ammonite Bevahites bevahensis Austin Chalk Formation
JamieLynn posted a gallery image in Member Collections
From the album: Texas Cretaceous Fossils: Ammonites and Nautiloids
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- ammonite
- austin chalk formation
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From the album: Texas Cretaceous Fossils : Bivalves - Clams
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- bivalve.
- corsiacan formation
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Hi , i am showing some strange opalised fossils I have little clues about what they are. the first one on the right it’s opal replacing what ever ? on the left I splited that rock and it look like in the center a type of Gypsum ! The next picture i think it’s a pieces of coral , so rare we can see a tiny white eggs in stony opalised coral preserved next picture, just splited opal next picture it look like a Dinosaur opalised toes bones. the last picture split opal
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Hi folks! Received a new theropod indet. tooth today from the ever exciting Kem Kem. I was tentatively leaning towards a Carcharodontosaurid indet i.d., in line with morph type 3 in the always handy guide from @Troodon, but a few properties of the tooth have me wanting to get some extra opinions. Measurements: Crown Height: 27mm Crown Base Length: 10mm Cross Section: 7mm Mesial serrations: 5/mm (midline) Distal serrations: 3/mm (area just above damage at midline) There is a neat repair at the tip, a bit of damage to the enamel near the apex on the anterior and around midline on the posterior. There is also a shallow chip out of the enamel near the cervix (can be seen in the cross-sectional pic). The tooth is quite noticeably recurved (moreso than most teeth I've seen with a similar morph type). There is a labially displaced distal carina, in-keeping with Carch features, but chisel shaped denticles are present; something I have personally not seen on any teeth if this kind in the past. Lingual Side Labial Side Mesial Face (The mesial carina is lingually displaced and reaches approx ⅔ way down the mesial face. Denticles are very subtle and annoying to count.) Distal Face Cross Section Mesial Denticles Distal Denticles Comp w/ Carch indet. anterior tooth Denticles from the same position near the apex: Thanks in advance for any input.
- 9 replies
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- carcharodontosauridae
- cretaceou
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Fossils Reveal How Much Shorter Days Were 70 Million Years Ago
Oxytropidoceras posted a topic in Fossil News
Ancient Shell Has Revealed Exactly How Much Shorter Days Were 70 Million Years Ago https://www.sciencealert.com/old-shell-reveals-earth-s-days-were-half-an-hour-shorter-70-million-years-ago de Winter, N.J., Goderis, S., Van Malderen, S.J., Sinnesael, M., Vansteenberge, S., Snoeck, C., Belza, J., Vanhaecke, F. and Claeys, P., Sub‐daily scale chemical variability in a Torreites sanchezi rudist shell: Implications for rudist paleobiology and the Cretaceous day‐night cycle. Paleoceanography and Paleoclimatology, p.e2019PA003723 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019PA003723 Yours, Paul H. -
I am TRYING to figure out my pliotoxasters. I think i have three different species and am hoping for some confirmation or information! I grouped them into similar seeming "batches" and think these are the ID's but would appreciate any help. All Texas Cretaceous, various formations, mostly Walnut I think. These I believe are Pliotoxaster whitei Side view: These I believer are Pliotoxaster comanchei Side view: These I think are Pliotoxaster inflatus: side view:
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From the album: Cretaceous
Belemnitella americana (belemnite guard with phragmocone still attached) Upper Cretaceous Navesink Formation Monmouth Group Big Brook Colts Neck, N.J.-
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- cephalopods
- cretaceou
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(and 3 more)
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