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Showing results for tags 'turonian'.
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I recently acquired this nice little tooth from the Carlile Shale of north central Kansas, which I believe is Turonian in age. It looks like Cardabiodon ?venator to me, but I don't have much experience with the genus. What do others think? The tooth measures 27.17 mm along the slant and is 21.66 mm wide.
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Kuji Amber (Tamagawa Fm., ~91.05-85.2 Ma)
Barrelcactusaddict posted a gallery image in Member Collections
From the album: Fossil Amber and Copal: Worldwide Localities
“Kuji Amber” Hirono, Iwate Prefecture, Japan Tamagawa Fm. (Kuji Group) ~91.05-85.2 Ma Total Weight: 1.3g Longest Specimen: 10mm Lighting: Longwave UV Entry five of ten, detailing various rare ambers from European, Asian, and North American localities. Studies on this amber, and Japanese ambers in general, are especially fascinating from a pharmaceutical point of view. In early 2012, a particular diterpenoid was extracted from Kuji amber that has been shown to possess powerful anti-allergenic properties; this compound was named “kujigamberol”, and is extracted from powdered amber using methylene hydroxide (MeOH). In the case of powdered Iwaki amber, 18.5g of amber was added to MeOH for 3 days, after which the MeOH was evaporated leaving 0.8g of solid extract; further extractions and purification were applied, leaving 1.0mg of a colorless oil. Kujigamberol can be obtained from Kuji, Iwaki, Choshi, Mizunami, and Ube ambers, but its concentration decreases proportionally to the ambers’ age (i.e., the older the amber, the lower the yield). Kuji amber is found in exposures along the inner southern half of Kuji Bay, as well as further south at Noda Bay along the coastline, just north of the mouth of the Akka River: the exposures consist of sandstones, conglomerates, and amber-bearing carbonaceous mudstone (which also contains small plant fossils); the Tamagawa Fm. is roughly 200m thick, and amber is found within the middle and upper portions. Shell fragments of freshwater turtles can also be found in a bone bed within the uppermost portion of the Formation; immediately above the bone bed is a layer of volcanic ash containing zircon grains: these have been dated to be 91 million years old. The amber of the Kuji and Noda Bays is often found washed onto the shoreline as waterworn grains; there is a more well-known deposit inland, however, where amber is mined directly from the earth. Sources: “Comparison of the Biological Activity and Constituents in Japanese Ambers”; Advances in Biological Chemistry, Issue 10; Shimizu, et. al. 2020 “A New Assemblage of Plant Mesofossils (Late Turonian–Middle Santonian; Upper Cretaceous) from the Tamagawa Formation, Kuji Group, in Northeastern Japan”; Paleontological Research, Issue 25 (2); Masamichi Takahashi, et. al. 2021 “A New Species of Aquatic Turtle (Testudines: Cryptodira: Adocidae) from the Late Cretaceous of Kuji, Iwate Prefecture, Northeast Japan, with Special References to the Geological Age of the Tamagawa Formation (Kuji Group)”; Ren Hiyama, et. al. 2021© Kaegen Lau
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Kuji Amber (Tamagawa Fm., ~91.05-85.2 Ma)
Barrelcactusaddict posted a gallery image in Member Collections
From the album: Fossil Amber and Copal: Worldwide Localities
“Kuji Amber” Hirono, Iwate Prefecture, Japan Tamagawa Fm. (Kuji Group) ~91.05-85.2 Ma Total Weight: 1.3g Longest Specimen: 10mm Lighting: 140lm LED Entry five of ten, detailing various rare ambers from European, Asian, and North American localities. Studies on this amber, and Japanese ambers in general, are especially fascinating from a pharmaceutical point of view. In early 2012, a particular diterpenoid was extracted from Kuji amber that has been shown to possess powerful anti-allergenic properties; this compound was named “kujigamberol”, and is extracted from powdered amber using methylene hydroxide (MeOH). In the case of powdered Iwaki amber, 18.5g of amber was added to MeOH for 3 days, after which the MeOH was evaporated leaving 0.8g of solid extract; further extractions and purification were applied, leaving 1.0mg of a colorless oil. Kujigamberol can be obtained from Kuji, Iwaki, Choshi, Mizunami, and Ube ambers, but its concentration decreases proportionally to the ambers’ age (i.e., the older the amber, the lower the yield). Kuji amber is found in exposures along the inner southern half of Kuji Bay, as well as further south at Noda Bay along the coastline, just north of the mouth of the Akka River: the exposures consist of sandstones, conglomerates, and amber-bearing carbonaceous mudstone (which also contains small plant fossils); the Tamagawa Fm. is roughly 200m thick, and amber is found within the middle and upper portions. Shell fragments of freshwater turtles can also be found in a bone bed within the uppermost portion of the Formation; immediately above the bone bed is a layer of volcanic ash containing zircon grains: these have been dated to be 91 million years old. The amber of the Kuji and Noda Bays is often found washed onto the shoreline as waterworn grains; there is a more well-known deposit inland, however, where amber is mined directly from the earth. Sources: “Comparison of the Biological Activity and Constituents in Japanese Ambers”; Advances in Biological Chemistry, Issue 10; Shimizu, et. al. 2020 “A New Assemblage of Plant Mesofossils (Late Turonian–Middle Santonian; Upper Cretaceous) from the Tamagawa Formation, Kuji Group, in Northeastern Japan”; Paleontological Research, Issue 25 (2); Masamichi Takahashi, et. al. 2021 “A New Species of Aquatic Turtle (Testudines: Cryptodira: Adocidae) from the Late Cretaceous of Kuji, Iwate Prefecture, Northeast Japan, with Special References to the Geological Age of the Tamagawa Formation (Kuji Group)”; Ren Hiyama, et. al. 2021© Kaegen Lau
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Hello forum members! With the new Coronavirus raging across the world, I thought it would be nice to start some kind of advent calendar, using my own Squalicorax collection. Everyday I will post one or multiple Squalicorax teeth from one location. Let's see what ends sooner, my collection or the virus outbreak. I will start with the oldest tooth from the Albian substage and end with the teeth from the uppermost substage; the Maastrichtian. The first one is the oldest and also one of the smallest teeth in my collection. Unfortunately it is so small that the photo's are not as sharp as I would have liked, but I think they are good enough. It is Squalicorax primaevus from the Middle Albian Argiles tégulines of Courcelles, Aube Department, France. See you guys tomorrow, Sander
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I found this tooth (2.75 mm length) while sorting micro-matrix from Post Oak Creek in Texas (Turonian). I had originally hoped this might be a posterior Coniasaurus tooth based on the more conical tooth type and root but have since found in publications that some Pycnodont tooth forms closely overlap posterior Coniasaurus teeth in general morphology. My guess would now be some kind of less common type of Pycnodont tooth form (the flat types are common in the samples) but I wanted to see what others thought.
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During the Christmas holiday we had the opportunity to go on 2 field trips to the north of France. 1st one was just after Christmas when we visited the Turonian part of the cliffs. Here we found a couple of nice ammonites ( Mammites nodosoides and a realy nice Fagesia catinus ) and a big flint echinoid. (with @Natalie81 and @Euhoplites) The second trip was last weekend, but we had no luck with the weather this time and we had heavy rainfall for most of the day. Also lots of competition that day. Not a lot of fossils to be found that day: a small flint echinoid, a big Mariella sp. but not the best preservation and an Acanthoceras, but this one is still completely in the matrix, I don’t know how this one will turn out. pic's from the 1st day: The echinoids from the construction site: Fagesia catinus all cleaned up the 2nd field trip: a wel hidden Acanthoceras rhotomagense: Rain, rain, rain,.. I almost forgot, Best wishes for 2022 to all the forum members
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- ammonites
- cap-blanc-nez
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Hey y'all, here's an ammonite I found in what I'm fairly sure is a small, unmapped Eagle Ford outcrop. I'm hoping to use it as an index fossil, as the target species that I'm hoping this outcrop will produce occurs in the late cenomanian/early turonian Bouldin Flags member of the Eagle Ford formation. I find that the written descriptions that I've read about the bouldin flags geology are inadequate for my understanding, as it seems colors, shades, and degree of textures are up to the interpretation of the reader. Maybe I'm just overthinking that though. Hopefully this ammo helps. @LSCHNELLE, I know you're familiar with the Bouldin Flags - seem familiar? (Diameter=1 inch)
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Hello, I found these two plants in platy limestones on Dec.19.2021. in Bojići, near Trogir, Croatia. Geology is late cretaceous-turonian. Can they be identified tro some degree? Thanks
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New Jersey Amber (Raritan Fm., Potomac Group, 93.9-89.8 Ma)
Barrelcactusaddict posted a gallery image in Member Collections
From the album: Fossil Amber and Copal: Worldwide Localities
A small 2.5g representation of a 41.1g lot of amber from the old Crossman Clay Pit locality. This amber is mostly unsearched, and a few specimens I have inspected contain some inclusions; preparation will be needed to identify these inclusions, however. Spectroscopic and chemical analyses indicate this amber was produced by distinct, related species within the Cupressaceae family. The material from this lot was collected in the early 1990's by the late Kevin Kropiki; he collected at this locality in association with representatives from the American Museum of Natural History: his significant contributions aided and furthered the study of this amazing material and its inclusions.© Kaegen Lau
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This weekend we had some nice weather for this time of the year , so we went to the beaches in the north of France for a stroll with the dog and hopefully some fossils. It is a 2h drive from were we live, so we got there around 10 o’clock. That’s around the time that the tide was starting to lower again, so we had all day access to the beach. We started our walk in Sangatte, just under Calais. And went south following the Turonian chalk cliffs. After a while we spotted our 1st fossil echinoid between the flint pebbles on the beach. Further South, the retreating tide started to uncover some interesting chalk boulders that could contain some ammonites. A few half or severely worn down specimens could be spotted, but after a while we found something really promising. A small part of different colour that could be the start of an ammonite rib was peeking out of one of the boulders. A quick hit with the chisel next to it exposed a larger part of what was indeed a large ammonite. We then took our time to clear out the whole fossil. We got it out in one piece , A 35cm wide Morrowites wingi. After this we didn’t get much further down the beach due to the weight of the ammonite in the backpack, but we kept looking in the same area for other fossils. We each found an additional echinoid on the beach and as a bonus on our way back to the car we found a ptychodus tooth.
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- cap-blanc-nez
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Fossil hunting trip to Cap Blanc Nez (Cretaceous of France)
ziggycardon posted a topic in Fossil Hunting Trips
Hi everyone, Last week after getting lots of recommendations from people I spend a couple of days at Cap Blanc Nez in France to look for some fossils. And while it wasn't to most bountyfull hunt I did have a lot of fun and I was very pleased with the little finds that I managed to do. We had very nice weather, it was sunny and the temperature was just perfect for fossil hunting, and the cliffs and beach (and landscape overall) were absolutely stunning. The fossils in Cap Blanc Nez date back to the Cretaceous and there are deposits from the Turonian, Cenomanian & Albian. I spent a lot of time searching in the clay deposits which lay on the beach. Besides fossils we also found some washed up marine life: A large jellyfish (Rhizostoma sp.) A washed up Harbor Porpoise (Phocoena phocoena) A washed up Small-spotted catshark (Scyliorhinus canicula) We also payed a little visit to the beach at Wissant although we didn't went there to search for fossils but to visit an old shipwreck
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Dear Fossilforum members, I was wondering if the echinoid on this piece of matrix is indeed a Gauthieria radiata and if so, does that appoint this fossil to the lower, middle or upper Turonian? The shark tooth is a Squalicorax falcatus and the piece was found in the Ardennes departement of France. I know the age of a few locations nearby, but the age of the location where this piece is from is nowhere to be found in literature. I also am not sure if I may say where it was (it took a lot of questioning to find out where it can from haha). Therefore I hope that the echinoid perhaps could be used to appoint a specific age to it. In anycase, thank you very much for your answers, Kind regards, Sander
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- cretaceous
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Looking for Goulmima Turtle fossils, have some other moroccan fossils for trade
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I have several Heteromorphs but none have such large protrusions. Are these called horns? I worked on this for an hour trying to expose as much as possible, it's buried in bacculites. Found in shale in north Irving TX, inc. pic of other ammonites found there.
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Stabilized with Butvar B-76; repaired using an unspecified cyanoacrylate. Identified by Dr. Alexander Averianov as a sacral vertebrae of a juvenile Levnesovia transoxiana. The specimen is either from Dzarakuduk or an excavation near the city of Uchkuduk many years back.
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- bissekty formation
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It has been to long since we posted a fieldtrip, but the curent worldwide situation did hamper our fossil hunts. A few days before Chritmas the situation in France changed and we could again go to the beaches in the North for fossil hunts. The 24th we went to the "Grand Blanc Nez" to prospect the turonian boulders en hopfully score a few big ammonites. This time we were als prepared for big finds: we took a handcart with us, because the previous time we had trouble to bring a couple of ammonites back to the car due to their weight ( 2 km on foot with more than 30 kg of ammonites is hell ). The weather conditions of the past few days had cleared up a lot of boulders and it didn't take long for the first ammonites to appear. Natalie found the first specimen, a Lewesiceras peramplum from over 30cm in diameter and a while later a loose Mammites nodosoides. A while later It was my turn and I found an large Mammites nodosoides from around 30cm lying between the rocks. a few extra ammonites were found, but of lesser quality. Halfway our day Natalie found a chalk boulder with a few bone fragments peeking out. not sure of what it could be we took it back home to see what the preparation would give. while heading back Natalie found the last ammonite of that day, this time a Fagesia catinus wich was a nice addition since we diddent had this genus in our collection yet. The ammonites where prepped over the following couple of days, but at first sight the bones didn't seem prommising so they were left asside for a while. So earlier this week we picked it back up and tried to prep it further. tou our surprise one of the fragments turned uot to be a complete marine reptile vert Natalie was overjoyed with this fossil. Just waiting for us on the beach : The prepped specimens: Mammites nodosoides ( 30 cm ) Lewesiceras peramplum ( 34cm ) Fagesia catinus ( 27 cm ) The marine reptile vert ( probably plesiosauria )
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Echinocorys-gravesii-micraster-decipiens-3.jpg
elcoincoin posted a gallery image in Member Collections
From the album: Best of 2020 finds - a year in review : 2 - echinoids
a nice echinoids association Echinocorys gravesii (x3) and Micraster decipiens found in Sennevile-sur-Fécamp, Normandy, France in july 2020 - Cretaceous - Turonian - view 3 -
Echinocorys-gravesii-micraster-decipiens-2.jpg
elcoincoin posted a gallery image in Member Collections
From the album: Best of 2020 finds - a year in review : 2 - echinoids
a nice echinoids association Echinocorys gravesii (x3) and Micraster decipiens found in Sennevile-sur-Fécamp, Normandy, France in july 2020 - Cretaceous - Turonian - view 2 -
Echinocorys-gravesii-micraster-decipiens-1.jpg
elcoincoin posted a gallery image in Member Collections
From the album: Best of 2020 finds - a year in review : 2 - echinoids
a nice echinoids association Echinocorys gravesii (x3) and Micraster decipiens found in Sennevile-sur-Fécamp, Normandy, France in july 2020 - Cretaceous - Turonian - view 1 -
A New Texas Echinoid Species
JohnJ posted a topic in Partners in Paleontology - Member Contributions to Science
Back in July of 2009, I was crawling around an Upper Cretaceous Eagle Ford Formation (late Turonian) site that was exposed by recent excavations. There were many amazingly preserved marcasite / pyrite encrusted ammonites and other fauna to be found. However, one of 'gems' of that site was a beautiful, tiny regular echinoid. I was fascinated with it and I made additional discoveries that I wrote about in an article on The Fossil Forum. (early images) In trying to establish an identification, I checked with several experienced Texas collectors and none of them recognized it. When that happens, you really start to get your hopes up you may have found something new to paleontology. Then, I saw a similar echinoid on London's Natural History Museum website, The Echinoid Directory. Ahhh! Finally, I figured out that the genus must be a Bathysalenia ...but, there was no species listed for North America and my find had some distinct differences. This ID was tentatively confirmed by a few other echinoid experts and a new search began. (holotype - early images and actual size @ 1440 x 900 screen resolution) It still took almost another year of personal research and networking to find someone able to take on the project of the little urchin. Again, I must mention that Alex Osso (thank you, my friend) was very patient, offered good advice and was helpful in facilitating paleo connections. Ultimately, he introduced me to paleontologist, John W. M. Jagt. This surprised and thrilled me because I was familiar with some of his work on mosasaurs (another of my favorite fossils.) His interest was due to his prior research on Turonian aged fauna of Europe. Over the next four years, the article had many "starts" and "stops", since it was a personal project. However, we stayed in touch and the work continued when possible. During this process, I decided to name this fossil after one of my older nephews. He accompanied my late Dad and me on many outdoor adventures when he was younger. So, I'm really excited to introduce a new species of echinoid from the Eagle Ford Formation of Texas: Bathysalenia skylari n. sp. This is the first record of the genus in North America and the first regular echinoid in the Eagle Ford Formation. The holotype and one paratype have been contributed to the University of Texas Non-vertebrate Paleontology Lab. Another paratype has been donated to the Maastricht Natural History Museum (where John Jagt is the Curator of Paleontology.) (specimen #7 and #13) Bathysalenia skylari, a new late Turonian (Late Cretaceous) saleniid echinoid from central Texas, USA Abstract: "A new species of saleniid is recorded from the so-called ‘Eagle Ford Condensed Zone’ with typical elements of the late Turonian Prionocyclus hyatti cephalopod Zone, which rests unconformably on the South Bosque Marl (Collignoniceras woollgari cephalopod Zone) in the Georgetown area, Williamson County (central Texas). It is easily distinguished from both extinct (late Albian - early Paleocene) and extant congeners by a comparatively low test, wide ambulacral zones with large (near-)horizontal pore pairs, a large peristome with conspicuous gill slits and a highly ornamented apical disc with a relatively small suranal plate. The new species constitutes the first record of the genus Bathysalenia from North America."
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- Bathysalenia skylari
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having been unable to go out a full day to search for fossils for several months due to health problems, thanks to a recent improvement I went yesterday about 100 km from my home to see a site where rudists were found. The first fossil encountered was a huge colony of cone-shaped bryozoans which had fallen and overturned in a depression. (can be 150kg?). I forgot to take my centimeter scale, so in the photos there is my foot, my hand or my fingers .... Then, I found a rock rich in small Exogyra and rare Rhynchonella. Finally, the rudists were there, in a wall (only for the photo, impossible to extract without damage, hope they will remain visible for the next visitors) and some specimen more fragile or altered in scree. I will post photos of the collected samples later because they are very muddy and require a good bath ...(Sorry, Franz, you have to wait some days ) For me it was a great day in the sun, just before the rain returned today!
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Hi everybody! Today i wanna show you one of my dearest ammonites...Choffaticeras segne! Making a search by keywords in TFF, i found only three results for this species...so i decided to enlarge the number! Now i present you my Choffaticeras segne: it comes from Goulmima in Morocco, belongs to Turonian (Upper/Late Cretaceous), it is 19cm in height and 1.461kg in weight. This specimen has been polished in both sides, obviously. It's very decorative and it makes its good looking part in my living room. I love its external sutures, how do you call this kind of suture in english? Please, let me know! For who loves taxonomy and scientific classification (like me), i leave you a little pattern that i made. Thanks for "watching" Choffaticeras segne Dominio: Eukaryota Regno: Animalia Phylum: Mollusca Classe: Cephalopoda Sottoclasse: Ammonoidea Ordine: Ammonitida Sottordine: Ammonitina Superfamiglia: Acanthoceratoidea Famiglia: Pseudotissotiidae Sottofamiglia: Pseudotissotiinae Genere: Choffaticeras Sottogenere: Choffaticeras (Choffaticeras) Specie: Choffaticeras (Choffaticeras) segne
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- ammonite
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Image taken in cross polarised light using an oil-immersion objective lens at 1000x magnification. One of the smallest fossils ever posted on TFF.
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- chalk
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ammonite hunting in the Turonian and Cenomanian
Manticocerasman posted a topic in Fossil Hunting Trips
Good tides and a promising weather forecast and we were ready to go for a trip to the French coast ( Cap-Blanc-Nez) High tide was set for 8AM, so we left around that same time, getting there when the tide was starting to go down giving us a whole day of opportunities to search. First stop was the beach of the “Grand Blanc Nez” with the Turonian cliffs. Since our last visit there, there have been high tides and multiple parts of the beach were cleared of the sand. The prospection of the loose boulders revealed for me a large Mamites nodosoides and a Morrowites wingi. I was especially happy whit that last one since it is the first specimen of this species that I found. Natalie found a small belemnite , although this might not seem spectacular, it is probably the best find of the day as they are incredibly rare in the Turonian at this location. On our way back to the car Natalie found another ammonite, this time a Lewiseceras peramplum. The way back to the car then became quite hard due to the weight and sizes of those fossils. In the afternoon we went a couple of kilometers further to prospect the Cenomanian boulders on the beaches near “Petit-Blanc-Nez”. On the first few meters on the beach I found a boulder with a really nice Cunningtoniceras inerme sticking out. Further down the beach we found a few smaller ammonites, but we ended distributing those to a few starting fossil collectors that were prospecting the area. The last good find of the day was made by Natalie who found a small but exquisite nautilus fossil ( Eutrephoceras sp. ) in the Turonian boulders: to late for this one: Mamites nodosoides: Morrowites wingi : Lewesiceras peramplum: in the Cenomanian boulders: Cunningtoniceras inerme: the little nautilus: Eutrephoceras sp. : of cource the pictures of the prepped specimens will follow.
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- cenomanian
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Hello everyone, I saw this specimen for sale as a new species from the Vallecillo quarries. I haven’t seen something like this from this formation. Does anyone have any idea of what species might this be? The size of fossil is approximately 40 cms long. The size of the matrix is 63 cms * 43 cms. The pictures were not taken by me. Thanks everyone.
