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Showing results for tags 'cenomanian'.
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References: A. S. Woodward. (1901) Catalogue of Fossil Fishes in the British Museum (Natural History), Part IV 1-636. HAY, O.P. (1903) On a collection of upper Cretaceous fishes from Mount Lebanon, Syria, with descriptions of four new genera and nineteen new species. Bulletin of the American Museum of Natural History, 19 (10): 395–452. Peter L. Forey, Lu Yi, Colin Patterson & Cliff E. Davies (2003) Fossil fishes from the Cenomanian (Upper Cretaceous) of Namoura, Lebanon. Journal of Systematic Palaeontology 1(04):227 - 330. DOI: 10.1017/S147720190300107X
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as a connoisseur of Pterosaurs, I wanted to ask the Community here to show me it's pterosaur fossils from the Kem Kem Formation. After seeing a rare Tapejarid Premaxilla recently get sold on a Fossil Dealing site (labeled incorrectly as Alanqa), I wondered what treasures could be present in Private Collections in this Community. Teeth are just as welcome as Bones are.
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On our Christmas fossil hunting trip Natalie found a nice Acanthoceras rothamagense in a loose boulder on the beach, All we had to do is reduce the size of the boulder to make it fit in the backpack. A few days ago I removed a large chunk of exces matrix with a powertool. Today I took the time to prepp the whole ammonite. this is the result after 4 to 5 hours of prepwork: The final result: Acanthoceras rothamagense Upper Cenomanian Cap-Blanc-Nez ( France ) 20cm in diameter
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Like last year Natalie and I spent 4 days on a fossil hunting trip on a few different locations on the northern coast of France. Each day a different location. The stormy weather conditions made the beaches realy favorable foor fossil hunting as lots of specimens could be found loose on the beaches. We started Saturday with Turonian sea urchins, sunday Kimmeridge clay and limestone, monday turonian ammonites and the last day mostly cenomanian fossils. Highlights of the trip were a few large ammonites ( Lewisceras and Acanthoceras ) and a rare tooth of a marine reptile from the Kimmeridge deposits.
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From the album: Cretaceous Shark Teeth
A very rare Leptostyrax from the Kem Kem beds of Morocco. Lower Upper-Cenomanian in age. -
From the album: Cretaceous Shark Teeth
Very rare Leptostyrax from the Kem Kem beds of Morocco. Lower Upper-Cenomanian in age. -
Lit.: S.K.Samsonov (1967) Betulites Goeppert, Upper Cretaceous of Kazakhstan and North America. International Geology Review 9(2):218-219. DOI: 10.1080/00206816709474457 Robert W. Baxter (1954) The University of Kansas Collection of Fossil Plants. I. The Dakota Sandstone Flora. Transactions of the Kansas Academy of Science (1903-) Vol. 57, No. 1 (Mar., 1954), pp. 41-47 (7 pages)
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From the album: Cretaceous Shark Teeth
Beautiful and very small, cusped Cretoxyrhina mantelli from Ryazan Region of Russia. Cenomanian in age. -
From the album: Cretaceous Shark Teeth
Beautiful and very small, cusped Cretoxyrhina mantelli from Ryazan Region of Russia. Cenomanian in age. -
Hello, I recently acquired some fossils from the Vallecillo member of the Agua Nueva formation. The Agua Nueva Lagerstätten is famous for its perfectly preserved fish and marine reptiles. It is late cenomanian in age about 90-93 million years old. I got two large ammonites from one of my trips to Mexico. I was wondering if someone can identify it to the family, and possibly the genus level. They are preserved in a finely bedded shale. This one one is the largest one it is about 8 inches long.
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From the album: Plants
Betulites sp. Upper Cretaceous Cenomanian Dakota Formation Ellsworth Kansas USA Length 6cm / 2 inch -
Pterosaurs of the Kem Kem Beds, more than just Coloborhynchus and Alanqa.
Sassy PaleoNerd posted a topic in General Fossil Discussion
Pterosaur Fossils are a rarity, and few ever are on the public market, but the Pterosaurs from the Kem Kem Beds are seen most commonly on the market, this is rather not due to an unusally high Pterosaur abundance, but rather because almost every Fossil is being collected at this locality. Currently, there are 4 named species from the Kem Kem Beds, but the actual number is far higher. The Named Taxa are Alanqa saharica, Xericeps curvirostris, Sirrocopteryx morrocanus and Coloborhynchus fluviferox. Some unnamed ones im allowed to talk about are the Kem Kem Tapejarid, a small Chaoyangopterid species and a 3rd Ornithocheirid. The small Chaoyangopterid originally was identified as a Pteranodontid, but it is a Chaoyangopterid. There are up to 4 more Pterosaurs from this Locality, but I am not allowed to talk about them, all of them Azhdarchoids though. The 3rd Ornithocheirid wont affect the identification of any of the Ornithocheirid teeth, but that's all I can say. Sirrocopteryx and Coloborhynchus The Identification of Pterosaur Teeth from Kem Kem has recently become impossible to the genus level, for the most part that. C. fluviferox is a gigantic Ornithocheirid, and any Teeth of greater size might be referable to it, cf. Coloborhynchus fluviferox. Another thing notable is that the Identification can be restricted to a subfamily, Coloborhynchinae indet. instead of Ornithocheiridae/Anhangueridae indet., although this is rather Nitpicky. Alanqa and Xericeps Both of these Taxa are primarily known from Mandible and Rostral Tips, identification of these is rather easy, with the one of Alanqa being triangular in crossection, and the ones of Xericeps curving upward. Loads of Postcrania is also often refered the either of the two, referal is inconclusive though, especially considering there are more than just those two. The Chaoyangopterid and Tapejarid I have never seen either two on sale, but I will be mentioning them further too. The Tapejarid is a large Taxon related to Sinopterus, it's the first image. But there is more Material I cant mention. The small Chaoyangopterid is just a mandible fragment, but it has a rather deep crest. What about the Dsungaripterid? The Material of the Dsungaripterid most likely represents Xericeps.
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From the album: Odd and Rare Shark Teeth
A Cenomanian aged Heterodontus sp. from the Ryazan Region of Russia. -
From the album: Odd and Rare Shark Teeth
A Cenomanian aged Heterodontus sp. from the Ryazan Region of Russia. -
Chasing Opal and Fossils in the Australian Outback An ambitious collaboration between scientists and a local mining community seeks to preserve one-of-a-kind opalized fossils. BY Clare Watson, Undark https://undark.org/article/chasing-opal-fossils-australian-outback/ A recent paper is: Bell, P.R., Fanti, F., Hart, L.J., Milan, L.A., Craven, S.J., Brougham, T. and Smith, E., 2019. Revised geology, age, and vertebrate diversity of the dinosaur-bearing Griman Creek Formation (Cenomanian), Lightning Ridge, New South Wales, Australia. Palaeogeography, palaeoclimatology, palaeoecology, 514, pp.655-671. Yours, Paul H.
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Although we didnt realy plan for a fossil field trip, we did go to Boulogne sur mer yesterday to visit the aquarium "Nausica". and since the chalk cliffs of cap blanc nez are only 20min away from there we did make a stop for a couple of hours at the beach at the cliffs. I can recomend a visit to the aquarium to enyone who visit's the are, it is definitely worth a visit, although the entrence fee is quite expensive. On our visit at the beach we were only equiped with a small hammer, but lots of boulders shore were already broken through the waves and still deliverd quite a lot of fossils. I also picked up a pice of chalk with a bone fragment in it. this was something I haven't found there before, we are still prepping this to see what we can make out of it: Visit at the aqurium: the vieuw at the top of the "Grand Blanc Nez", You can see the UK from there Vieuw on the coastline: ammonite in the boulders: the finds: the mystery bone:
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I'm used to find ammonites and invertebrates, but this time I took home piece of chalk from the beach with a bone inside. I have totaly no Idea of what kind of bone this is or even from what kind of creature. I am still prepping the piece, but those are already the 1st few pictures. hopefully someone got more info on this: Cenomanian from cap-blanc-nez France ( marine chalk deposits)
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Hello all I recently bought a tooth from the Kem Kem beds that clearly belongs to the genus Onchopristis. The weird thing about the tooth is that it has two hooks instead of just one. I know the species Onchopristis dunkeli has two (or more) hooks, but I don't find any official rapports metioning them in the Kem Kem beds. The tooth has yet to arrive, but I already wanted to ask the question. What do you think? Is there a chance O. dunkeli occurs in the Kem Kem beds or would it just be a pathological example. I have been searching a long time for a specimen like this. The tooth has not yet arrived so sorry, no photo's yet. @LordTrilobite, @Haravex Greetings Thijs
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Thank you.
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This weekend Natalie found an intriguing fossil: a Hypoturrillites whit an epibiont on the shell. I've rarely seen this kind of association and it makes me wonder if the epibiont was already on the shell when the ammonite was alive or dit it grow on it after it fell on the sea floor. If anyone has papers on the subject it would be greatly apriciated ( @doushantuo maybe? )
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cleaning and preparation of the cephalopods from last weekend
Manticocerasman posted a topic in Fossil Preparation
I just spend the evening cleaning and preping some of the cephalopods I found last weekend. those are all from the cenomanian at the French coast. A couple of nautiloids ( Eutrephoceras sp. ) A couple of turrelites and a Manteliceras sp.
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Coprolites? Collected near scales, teeth and fish vertebras. It sticks on tongue but aren't visible biological inclusions. Your opinion please.
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We are back from a very windy fieldtrip to Cap blanc Nez in France. The wind covered a lot of the rocks with sand and sea foam ( https://en.wikipedia.org/wiki/Sea_foam ) which made fossil hunting rather difficult. We were helped by a local collector in the morning who guided us through the Turonian deposits of this site where we rarely colect, here we got 2 big ammonites. One of them was a Mamites nodosoides, this species as been on my wishlist for a while, so I am very happy with it In the afternoon we prospected the Cenomanian side. her we found the usual Mantelliceras and Scloenbachia ammonites. The prospecting site: ( we did see the coast of the UK on the other side of the channel ) Some of the ammonites we found: The Mammites: pictures of the prepped specimens will follow during the next week.
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Hi, a friend of mine told me he found some Placentyceras in a place where the geologic ages go from the Albian to the Turonian-Santonian, but most of the stratas of that place are Cenomanian. I believe this fossil is not an ammonite, but rather an Oyster or a rudist. I mostly think about Requienia or Toucasia. The geologic file mention the name of Toncasia bayleia. Do you know if Toncasia is a synonym of Toucasia and do you think i'm right thinking this is a rudist ? Lenght : 7 centimeters.
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new cenomanian ammonite prepps and restauration
Manticocerasman posted a topic in Fossil Preparation
on the last fieldtrip from this saturday I got a new batch of ammonites to prepp: the first one was realy easy to prepp, it was a small but well preserved Schloenbachia varians. next up is a Mantelliceras, I broke it in 3 pieces when extracting it from the chalk. I let the specimen dry at home and glued the pieces back together, I then prepped the specimen. After this step I grinded the some matrix residue left from the matrix and mixed it with a little bit of water and PVA glue, I used this mixture to fill and restaur the gaps in the ammonite. once dry I gave the ammonite a Paraloid B72 treatment for consolidation. I'm very pleased with the results
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