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Showing results for tags 'triassic'.
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Triassic Bivalve Imprint from the Triassic Basin NC (~230 Ma)
AlexSciChannel posted a topic in Member Collections
Here is a picture of a Bivalve imprint I found whilst in a Creek in Western Wake County. I was in the Triassic Basin and they have fossils dating back around 230 Ma ± 2 ma. It was part of the Carnian Stage of the Triassic part of the bigger Newark Supergroup. I presume it is a freshwater genus but I don't hear much about freshwater Bivalves when it comes to Triassic fossils.
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Just found this today. It will hook up with the trackway I’m putting together once i get the rock hauled out. My first Eubrontes!
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The trackway is about 18’x12’. It’s looking good. Still have a few more pieces to go. And a couple really big ones to drag into place.
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Found this piece on a walk near a Triassic outcrop in Pennsylvania, has a pretty exact visual similiarity to the wing rib of a Triassic reptile but is likely just some form of sedimentary trace. It would be great to get some more opinions on this piece to see if its worth holding onto or I would label it to be definitely sedimentary and rid of it, which I feel is the case.
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Hi, I've found a few things looking back at my Aust cliff material. This here somewhat resembles a tooth or claw in shape. I'd appreciate if anyone could tell me what it is? Found at Aust cliff, UK. It's 6mm long. Many thanks.
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Massive volcanic eruptions ....led to the Permian-Triassic “Great Dying”
butchndad posted a topic in General Fossil Discussion
Burning Fossil Fuels Helped Drive Earth’s Most Massive Extinction Massive volcanic eruptions ignited oil and coal deposits in Siberia in the events that led to the Permian-Triassic “Great Dying” event. https://www.nytimes.com/2020/11/18/science/extinction-global-warming.html?surface=home-discovery-vi-prg&fellback=false&req_id=306199646&algo=identity&imp_id=923294229&action=click&module=Science Technology&pgtype=Homepage -
Assembly is coming along nicely! Still hauling out pieces to fill in the gaps. Hopefully the weather will hold out.
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Wanted to share an usual fossil I self collected a long time ago from the Triassic of New Jersey that I can't really find images of elsewhere on here. This a fossilized large Gall wasp nest, took me awhile to figure this one out initially. I've seen fossils insects but its a pleasant suprise to see a fossilized insect nest.
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Taxonomy from Fossilworks.org. Genus Diagnosis by Bartram 1977, p.163: " Small macrosemiid fishes, the trunk tapering gradually to form a broad caudal peduncle; skull roof bearing genuine; gape small, the quadrate articulation lying beneath the anterior part of the orbit; dentigerous expansion of maxilla with upper and lower borders straight and diverging posteriorly, hind border also straight and perpendicular to oral border, bearing about 13 small, closely—set teeth; mandible with dentary bearing about 12 closely-set teeth, coronoid teeth rounded; leading edge of preopercular forming sharp angle; abdomina] vertebrae forming thin cylinders, notochord unconstricted; pectoral fin with about 15 rays, leading ray reduced to unpaired splint, no fringing fulcra; pelvic fin formed by five rays preceded by basa] and fringing fulcra; anal fin with seven rays, base compact; caudal fin weakly forked, axial lobe bearing five rays; dorsal fin single and long, preceded by basal and fringing fulcra, outline high anteriorly, convex posteriorly; region immediately on either side of dorsal fin devoid of scales; scales rhomboid." Species Diagnosis by Bartram 1977, p.164: "Legnonotus with about 25 dorsal fin-rays; dentary teeth tall and sharp." Line drawing from Bartram 1977, p. 164: Identified by oilshale using Bartram 1977. References: Bartram, A.W.H. (1977) The Macrosemiidae, a Mesozoic family of Holostean fishes. Bulletin of the British Museum of Natural History (Geology), 29, 137-234. Tintori, A. and Renesto, S. (1983) The Macrosemiidae (Pisces, Actinopterygii) from the Upper Triassic of Lombardy (N. Italy). Rivista Italiana di Paleontologia e Stratigrafia 89(2):209-222.
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Here is another of last months finds. I set it aside because of the beautiful rugose texture on one side thinking I aught to be able to find something about bones with this unusual texture. Now that I look at it again I'm wondering if it is a claw. It is three sided....the rugose side which has a slight outward curve; the opposite side which is much smoother and flat; and the underside(?) which has a smooth very concave surface. Any opinions?
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Now that I'm shut down for member the winter I'm going to try to catch up on my cataloging and ID work. First up, is this an ischium? If so whos? Any help appreciated. It and all the others I will be asking about are from the middle Petrified Forrest member of the Chinle formation...just below the Black Forrest member (it's almost completely erroded away and covered unconformably with the early Cretaceous Dakota Group Conglomerate) in undisturbed reddish brown mudstone with copious huge fossiliferous coprolites(?). Please let me know if I have forgotten any key info and thanks.
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Well preserved fossil allows reconstruction of probable dino brain https://phys.org/news/2020-11-reconstruct-brain-oldest-dinosaurs.html
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Synonym: Zhangina cylindrica Liu, 2002; Plesioperleidus jiangsuensis Qian 1997 From the sediments of the Lower Qinglong Formation, a number of species (Plesioperleidus, Zhangina, Suis, Jurongia, Quingshania, Peia .. ) have been described, which are difficult to distinguish at first sight and are usually traded either as "Plesioperleidus" or as "Lepidotes". Diagnosis for Zhangina jiangsuensis Qian et al., 1997 by Jin et al. p. 182: "Maxilla relatively slender ,length of its post-orbital part approximately 1/ 3 of the maxillary length ; scales smooth , with some exceptions slightly ornamented with ridges and with serrated hinder margin." Line drawing of the head by Jin et al. 2003, p. 174: Identified by oilshale based on head bones, dentition and squamation. References: D. Su (1981) A New Species of Perleidus from Anhui. Vertebrata PalAsiatica 19(2):107-112. MP Qian, SP Zhu, FM Zhao, XD Zhou, R Su & GH Gu (1997) Discovery of Early Triassic fish fossils and its significances in Jurong, Jiangsu Province. Jiangsu Geology 21, 65-71, 1997. Jin, F., Wang, N.Z., Cai, Z.Q., (2003) A revision of the perleidid fishes from the lower Yangtze region of South China-second report on the fish sequence study near the Permian-Triassic boundary in South China. Vertebr. PalAsiatica 41, 181–190 (In Chinese with English abstract). Li, Q.G. (2009) A new parasemionotid-like fish from the Lower Triassic of Jurong, Jiangsu Province, South China. Palaeontology 52, 369–384. Xincheng Qiu, Yaling Xu, Zhong-Qiang Chen, Michael J. Benton, Wen Wen, Yuangeng Huang, Siqi Wu (2019) The Early Triassic Jurong fish fauna, South China: Age, anatomy, taphonomy, and global correlation. Global and Planetary Change, Volume 180, 33-50.
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Hey, Wondering if anyone could tell me what this bone is? I'm assuming Pachystropheus rhaeticus. Found at Blue Anchor, Somerset, UK, from the Rhaetian, Triassic, Westbury formation. It measures roughly 2cm long Cheers
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Taxonomy from Fossilworks.org. Synonyms: Perleidus eurylepidotrichia Liu 2002, Perleidus yangtzensis Su 1981. From the sediments of the Lower Qinglong Formation, a number of species (Plesioperleidus, Zhangina, Suis, Jurongia, Quingshania, Peia .. ) have been described, which are difficult to distinguish at first sight and are usually traded either as "Plesioperleidus" or as "Lepidotes". Diagnosis for Zhangina yangtzensis (Su, 1981): "Maxilla relatively short and broad, length of its post-orbital part approximately 2/ 5 of the maxillary length; scales well ornamented with ridges and their hinder margin serrated." Line drawing from Jin et al. 2003, p. 177: Identified by oilshale based on the head bones and the characteristic serrated and ornamented scales. References: D. Su (1981) A New Species of Perleidus from Anhui. Vertebrata PalAsiatica 19(2):107-112. MP Qian, SP Zhu, FM Zhao, XD Zhou, R Su & GH Gu (1997) Discovery of Early Triassic fish fossils and its significances in Jurong, Jiangsu Province. Jiangsu Geology 21, 65-71, 1997. Jin, F., Wang, N.Z., Cai, Z.Q. (2003) A revision of the perleidid fishes from the lower Yangtze region of South China-second report on the fish sequence study near the Permian-Triassic boundary in South China. Vertebr. PalAsiatica 41, 181–190 (In Chinese with English abstract). Li, Q.G. (2009) A new parasemionotid-like fish from the Lower Triassic of Jurong, Jiangsu Province, South China. Palaeontology 52, 369–384. Xincheng Qiu, Yaling Xu, Zhong-Qiang Chen, Michael J. Benton, Wen Wen, Yuangeng Huang, Siqi Wu (2019) The Early Triassic Jurong fish fauna, South China: Age, anatomy, taphonomy, and global correlation. Global and Planetary Change, Volume 180, 33-50.
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Probably from Petrified Forest member. Literature says phytosaur remains a common occurrence. Can anybody confirm what it is?
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Newly discovered Triassic lizard could float underwater (Southwest China)
Oxytropidoceras posted a topic in Fossil News
Newly discovered Triassic lizardcould float underwater to pick off preyBy Amy Woodyatt, CNN, October 28, 2020 240 Million-Year-Old Marine Predator Species With Fang-Like Teeth Uncovered in China, Science Tech Daily, October 28, 2020 Ancient marine predator had a built-in float, PhysOrg. Yours, Paul H.-
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Hi everyone, (Long story about how all this got started deleted, maybe later if anyone is interested) I have found at least three "sites" on my property where I have been finding phytosaur and metoposaur teeth and bone fragments for years now. Good fun for the kids and grandkids! Last month I finally decided to dig a little into the side of a small embankment where I had picked up a few teeth expecting to maybe find a couple more.....well...a couple hundred teeth later (plus partial teeth, bone fragments, scutes etc), a large phytosaur caudal vertebrae, a metoposaur interclavical(?) and a left dorsal corner scute from a desmatosaur (missing the spike-dangit!) I am thinking I need some advice on things like taking field notes, grids, stabilization, cataloging and especially identification. I don't believe the site is all that significant, most of it is regurgitates so a lot of the material is just chalky gunk (different than the siliceous nodules), but there is enough good stuff to make it really interesting. The teeth range from 2 mm to 56 mm and are from at least 5 species. I have only excavated a little less than a square meter each in two spots.....the surface fossil area is about 8m by 20m. I believe the deposit is in the upper Petrified Forest Member (purplish brown mudstone) of the Chinle formation possibly just below the Black forest member (based on the pet wood logs coming out of the much lighter colored and significantly altered layer between 1 to 5 m above. Lying (unconformity) on top of this is the early cretaceous Dakota Group Conglomerate. I already found the extremely helpful article Troodon recommended in one of the topics about the teeth of Coelophysis Bauri which answered many questions.....and then generated a whole new set. Well, several sets, like how do you tell the difference between juvenile C. Bauri pre maxilary ribbed conical teeth and what the consensus on the internet calls metoposaur teeth ( not to mention that the term "rutiodon" means wrinkled tooth)? Also, how am I supposed to measure the denticle width, lenght etc when its only 0.066 mm? I can't even see them (I can feel em though)! Also, now I need to find a similar study on Postosuchus.....several of these teeth are way to big for C. Bauri (all of them found within a few cm of the desmatosuchus scute....). You see! I really should document all this.... Any way, enough of my problems....I am going to try to figure out how to post some photos of this stuff in a collection if any one is interested. Rebecca
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Texas Panhandle Trip- Pennsylvanian, Permian, Triassic, Cretaceous and Miocene!
JamieLynn posted a topic in Fossil Hunting Trips
Took a little trip up to the Texas Panhandle for a little get-away and some fossil hunting! My parents, my husband and I rented an Air B&B near Clarendon TX (figured that would be a relatively "safe" pandemic travel solution and it worked out quite well!). We chose Clarendon (well, Howardwick, actually) because it was midway between the places we wanted to visit, AND, it is actually a famous area which the illustrious Mr. Cope of the Bone Wars (in the mid-1800s, Mr. Cope of the Academy of Natural Science in Philly and Mr. Marsh of Yale, vied to find the best and the most dinosaurs around the US) found and named a Miocene faunal bed- the Clarendon Beds at the Spade Flat Quarries at the RO ranch (An interesting aside....my mom worked at the Yale Peabody Museum when she was pregnant with me....surrounded by the dinos that Mr. Marsh collected. I'm pretty sure that's where my paleontological bent came from...) So to start our trip, we actually stayed a night in Snyder TX, and it's funny when you travel, the things you find...like dinosaurs, everywhere! And in Spur TX, a mural that we just happened to drive by! And outside of Canadian TX....on a hilltop! The first fossil stop was a Comanche Peak/Edwards Formation Roadcut - I had heard that you could find Pedinopsis Echinoids there...so we stopped the first day around 4pm...it was 98 degrees. I found a little echie that I THOUGHT might be a pedinopsis but was afraid it was really a Coenholectypus (which sadly, turned out to be the case. Nothing against Coenholectypuses, I just have a few of those!) . The next morning, I wanted to stop back by on our way to Clarendon, but a cold front blew through that night and the temp went from nearly 100 to 40 the next morning! Fortunately the wind was not blowing, so I got to stop back by and found a nice Engonoceras gibbosum ammonite, my first whole one of that species. Everything else was stuff I'd already found, but I did find a lovely Lima bravoensis. So on to Clarendon. I did my "homework" - searching the internet for info, Texas Pocket Geology site for formations and Google Maps for likely spots to search. The lake near Howardwick was Permian, so we looked there....no luck. I found the Miocene Spade Flats area and went up dirt roads to find it....didn't quite find it, but found the right formation....but no fossils. We drove along the road to look at Miocene era roadcuts that I saw posted about here on FF and no luck. So basically, the Miocene Clarendon Beds were a washout and the Permian in that area is non fossiliferous, apparently! Sometimes the fossil hunting is not exactly.....lucrative. Alas. But I did get to see Caprock State Park (and the Texas Bison Herd) Palo Duro Canyon and its Permian (red) overlayed by Triassic (purple and yellow) And some Pronghorn Antelope And then I FINALLY got some good fossil hunting in at a Pennsyvanian era roadcut near Mineral Wells! Finally! Some good new stuff! PIcs coming.... Gastropod Cymatospira montfortianus (1/2 inch) My first find of a Crinoid "bulb" -not completely but partial at least! 1/2 inch 6 fragments of a Crinoid Graffhamicrinus bulb "kit" in pieces (only four pictured, obviously) And some beautifully preserved Echinoid plates And finally, the last place we went was Archer City, where the Permian Red Beds are located, just outside the city. Again, I tried to find some likely looking roadcuts or places were we could go, but alas, it's all private property and nothing looked accessible. So, no Permian fossils or Miocene Fossils, this trip, but the Cretaceous and the Pennsylvanian always yield something good! So long, all you Texas longhorns!
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I came across this website with surprisingly cheap dinosaur footprints. This is one of the grallator footprint plates they are selling. It claims to be real and only darkened to make the footprints more clear. They say it is from Mt. Tom Massachusetts. They only give one picture though per item. .
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Hi, i found this at Aust cliff. I'd appreciate if any information about this could be shared. It crumbles quite easily. Many thanks.
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Hi, I went to Aust cliffs today. I brought back some material, and noticed these. Could they be bone fragments? They are probably not identifiable, but I think if they are bone fragments would most likely be from an Ichthyosaur or Plesiosaur. I think the one on the right isn't a bit of bone, rather an interesting bit of rock. Many thanks.
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New burrowing Drepanosaur discovered among Arizona's petrified Forrest https://www.latimes.com/world-nation/story/2020-10-15/researchers-discover-fossils-of-new-species-in-arizona
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