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Showing results for tags 'jurassic'.
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Is this liopleurodon tooth? Found in Volga region moscow please tell thank you
Cartoonfossil posted a topic in Fossil ID
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Hi all! I've been really busy creating all these watercolour illustrations based on fossils from the Jurassic Coast. Here we have an Ichthyosaur, a Plesiosaur, an Ammonite, a Scelidosaurus and a Belemnite. There will be a few more to come soon...
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Jurassic, Callovian, Oxford Clay, Peterborough Member, Yaxley, Cambridgeshire I've found a few of these recently, and been trying to puzzle them out. I had thought they might be crab claws. Today I found my largest and best preserved one so far. I can clearly see plates, but I haven't found plates on images of Jurassic crustaceans, including in Martill. What it more looks like is the diagram of Ophiuroids in the book, which is what @JamieLynn, suggested might be the case, due to the plates. I have found brittle star at the site before, but the preservation was very different, not at all pyratised. So I'm wondering if this is Ophiroid, crustacean or something else entirely. If crustacean I was wondering about Thalassinidea, because I find so many burrows. I've attached images of the fossil and images from this article for comparison: https://www.cambridge.org/core/journals/journal-of-paleontology/article/brittle-stars-from-the-british-oxford-clay-unexpected-ophiuroid-diversity-on-jurassic-sublittoral-mud-bottoms/8B34E184DFCF1CEEE275194CE2498B17 Any help would be greatly appreciated. The ends I find particularly fascinating.
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Gastropods with calcite crystals from Oxfordian stage (163,5 mln years)
Svetlana posted a topic in Member-to-Member Fossil Trades
Hello everyone. I offer interesting gastropods with calcite crystals - perhaps someone will be interested I have a lot of them. Pseudomorphoses of calcite after gastropod shells of the genus Nerinea from Upper Jurassic limestones of the Oxfordian stage (Izyum Formation J2-3iz); 163,5 mln years. Ukraine, Donetsk region. I'm interested in everything - I invite you to private messages Have a nice day VID_20220122_135535.mp4 VID_20220122_135732.mp4
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Lyme Regis plesiosaur propodial with pyrite disease - how to treat
pachy-pleuro-whatnot-odon posted a topic in Fossil Preparation
Hi all, A couple of years ago I acquired a lovely pair of plesiosaur propodial bones from Lyme Regis. It was a matched pair of both humerus and femur. Today, when I was looking to make space in my cabinet for a new acquisition I had made, I discovered some odd dust next to the humerus that, on inspection and to my horror turned out to be pyrite bloom! I immediately removed the specimen from the cabinet, checked the other podial and nearby fossils, and used a tooth brush to brush of the most direct traces of pyrite decay. But the question is: what now? How do I ensure the propodial's preservation, and make it safe for display again. Should I store affected piece in an open or closed container? I suspect the latter, together with silica beads to consume any excess moisture might be best right now. But how do I get to the point where I can take it out again? Any suggestions are welcome. From my own thread on this topic I know of the existence of pyrite stopper, which sounds ideal for this situation. But I've also been warned that this is quite a hazardous solution and am therefore afraid of trying this out myself. So, part of the question would be whether someone offers pyrite treatment as a service, of knows of someone who does. Thanks in advance for your help! @Ptychodus04 @DanJeavs @paulgdls @RuMert and others
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New large pterosaur described from the Jurassic of Scotland Dearc sgiathanach Headline : Pterosaur fossil from Scotland is largest Jurassic flier ever found https://www.cell.com/current-biology/fulltext/S0960-9822(22)00135-X?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS096098222200135X%3Fshowall%3Dtrue Article Daily Mail https://www.dailymail.co.uk/sciencetech/article-10537923/Worlds-largest-Jurassic-pterosaur-unearthed-Isle-Skye.html Article New Scientist https://www.newscientist.com/article/2309151-pterosaur-fossil-from-scotland-is-largest-jurassic-flier-ever-found/
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As it's too stormy to collect fossils... Jurassic, Callovian, Oxford Clay, Peterborough Member, Whittlesey, Cambridgeshire. This was something very odd I found from a concretion in the Oxford Clay. They are great for three dimensional fossils such as ammonites. It looks like wood, in which case it's my first bit that isn't carbonised, or possibly bone. It could also simply be mineral. Another possibility is fish. I really wish there was more of it, that might have cleared it up, and would appreciate your thoughts.
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Oxford clay, Peterborough Member, Jurassic, Callovian, Whittlesey in Cambridgeshire I collected this a few years ago, and I'm unclear whether it's a large cephalopod hook, or part of a fish, or something else entirely. Any assistance would be greatly appreciated.
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Jurassic, Callovian, Oxford clay, Peterborough Member, near Yaxley in Cambridgeshire. These are fragments I've picked up over time, wondering if they have bone texture or not. The bits I have that are unequivocally bone have better indicators. Opinions would be very welcome. The first I keep in my miscellaneous pile. These are all the same piece of rock. With something so small, even if it is bone, is it something that is potentially identifiable?
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Oxford clay, Peterborough Member, Jurassic, Callovian, near Yaxley in Cambridgeshire. I spent the morning getting muddy in wet clay, and found this. I think it might be part of a hybodont spine, or other ornate fish spine. I've collected a fragment of hybodont spine from this site before. The surface does seem to be enamel, and the shape is slightly curved. Any assistance greatly appreciated.
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I got the chance to go to the Oxford Clay twice over the last few days. I'm always looking for echinoderms at this site, and I prefer this one in winter when the vegetation has died back and I can spot lots of small, delicate detail. These are some if my favourite finds from the last few days.
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Taxonomy from Mindat.org. Diagnosis from Liu et al. 2010: "Costal area narrow. In forewing, Sc simple, terminating at C near pterostigma; M with 4 branches; Cu 1 and M forked before the cross-vein cu 1 -cu 2." Description from Liu et al. 2010: "Antenna filiform, incompletely preserved. Femur shorter than tibia. Tibial spurs not present. Setae irregularly arranged. Costal area narrow, one cross-vein c-sc between C and Sc. Sc simple, ending at C and extending to pterostigmal area. One short cross-vein sc 2 -r 1 before pterostigma. Rs arised at the same level to cross-vein csc. Rs with 4 branches. Length of R 2 two-thirds that of stem of R 2 + 3. Cross-vein r 1 -r 2 at level of pterostigma. Cross-vein r 3 -r 4 at level of cross-vein r 1 -r 2. Cross-vein r 5 -m 1 + 2 approximately at middle of wing length. Crossvein r 5 -m 1 proximal to cross-vein r 4 -r 5. One cross-vein r 4 -r 5 dividing cell R 4 into 2 cells. Conspicuous thyridium at fork of M, which has 4 branches. M 3 + 4 divided beyond the fork of M 1 + 2; cross-vein m 1 + 2 -m 3 between M 1 + 2 and M 3; cross-vein m-cu not straight, slightly S-shaped. Cu 1 coalesced with M for a short distance and separated from M before cross-vein cu 1 -cu 2. One cross-vein a 1 -a 2 connected 1 A and 2 A. 3 A absent. Female abdomen with 11 segments, segments 9–11 smaller than segment 8. One pair of cerci located at apex of abdomen. Right cercus with 3 segments. Third segment of left cercus not preserved. Basal segments fused with abdomen segment 11. Body length 7.8 mm, forewing length 8.2 mm, width 2.6 mm." Line drawing of the left forewing from Liu et al. 2010: Reference: NAN LIU, YUNYUN ZHAO & REN (2010) Two new fossil species of Itaphlebia (Mecoptera: Nannochoristidae) from Jiulongshan Formation, Inner Mongolia, China. Zootaxa 2420: 37–45.
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I'm trying to determine if these are echinoid. I found these two on an Oxford Clay trip yesterday, Jurassic, Callovian, Peterborough Member, near Yaxley in Cambridgeshire. The first is, I think, a partial echinoid spine. My only doubts are because it's quite different from the others I've found at the site, it's a very different pattern. I would appreciate another opinion. The second has completely confused me. It looks black, so I thought it was pyrite, but when I photographed it, it's clearly a completely different material. It's a very odd shape, like a tiny snowman, and the only thing I thought it might be is a mamelon from an echinoid tubercle. I don't have anything else like this, and the different material puzzles me. I would really appreciate opinions on this.
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These two coprolites have the most visible and interesting bits to them of any I have found. I've been trying to work out what the bits are, and I think they're bits of fish, from the colour and size, but I'd value more opinions! They are from the Oxford Clay, Jurassic, Callovian, Peterborough Member, and the first has colours I associate with fish remains I've found on the site. I don't really understand the dark pattern on the back. ETA: Sorry, I think this should have been posted in the coprolite sticky!
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Agaleus + Other Jurassic Shark Teeth Wanted
Untitled posted a topic in Member-to-Member Fossil Trades
Hello, everyone! I am in search of Jurassic shark teeth. Primary species I am looking for is Agaleus dorsetensis, an Early Jurassic Galeomorph shark that has been found in Europe, most commonly at Lyme Regis, UK. I prefer teeth with no matrix, no repairs or restoration. Other Jurassic taxa I am looking for include: Palaeocarcharias stromeri Crassodontidanus Notidanoides Phorcynis catulina Palaeoscyllium formosum Corysodon cirinensis I can offer fossil shark teeth of different rarities, depending on which teeth of these you can offer. Some of the more desirable taxa can warrant teeth of high rarity in return. I have everything from deep-sea squaliform material, to many of the desirable Cretaceous lamniform species, and other scarce shark taxa. Please send me a PM if you have any of these teeth, and what species you may be looking for in return! Best Regards Ben -
I'm trying to get to one Oxford Clay site pretty frequently, and it did not disappoint. I found my best gastropods from the site this weekend. I thought I had found two pieces of crinoid, but when I got home found it was four. More ammonite as well. Even better, I managed to not bring home any living creatures. Last time I had a caterpillar clinging to an ammonite.
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These are from the Oxford Clay in Cambridgeshire, Callovian, Peterborough Member at Yaxley in Cambridgeshire and for one reason or another have stumped me. I'm not convinced these are all fossils. The first doesn't quite look like the oolitic limestone I have, but it's what they remind me of, and I think they may be oolites rather than a fossil.
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It's been a sunny and very, very cold day. Most of the finds at the Yaxley site are small and intricate, lots of crinoid ossicles. What pops depends a lot on the weather conditions - today I found a lot of lighter coloured fossils, including my first coprolite from this site. There are a few I think I'll ask for help to ID.
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I will do these over a few posts. The site is Jurassic Oxford Clay, Peterborough Member, c.163 ma at Yaxley in Cambridgeshire. Any help would be greatly appreciated! The scale is in mm. The first I thought was Genicularia Vertebralis, but it looks a bit different from the others I've found, and has three distinct lines at the bottom of an unusually straight column.
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Hello i found this pebble in a Jurrasic area in Oman . The waves on the beach smoothened it. I found numerous coral and bivalve and Gastropod fossils. im thinking this may be a stromatolite? could it be? thank you very much for your time!
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Fossil hunting trip to Tontelange (Jurassic of Belgium)
ziggycardon posted a topic in Fossil Hunting Trips
On saturday I went on my first fossil hunting trip of 2021 with the BVP. Normally we would visit my favorite quarry "the Romontbos quarry" in Eben-Emael which is Maastrichtian in age, but due some complications that trip has been posponed till the end of September. Instead we went to the SETIM quarry in Tontelange in Belgian Luxembourg which was quite cool as it supposedly only the 2nd that this quarry allowed fossil hunting so everyone was quite excited. The rocks we hunted in this quarry are Jurassic in age, mainly Hettangian & Sinemurian. The lower levels of the quarry also had deposits of the Triassic (Rheatian) but those were not exposed at the moment unfortunately. But I had a great time at the quarry and I was very pleased with my finds. In a few of the quarry walls were used as nesting for sand martins (Riparia riparia) A piece of rock with the imprint left by a coral in it. A rock with some beautifull Crinoïd stems..jpg.206a4ed24511045cdbefbcd8739cdfb7.jpg)
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This past summer, we went to Dinosaur National Monument. I'd highly recommend it to anyone interested in dinosaur fossils and people with kids. It's a great opportunity to see fossil dinosaurs in their natural state and in a quarry, plus other fossils are around too (e.g. mini clams). I know you can't collect there, but it's good to see sites with an abundance of fossils the way they've been for ages. Lloyd
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Hey Guys, I was offered this piece from the Atlas Mountains in Morocco, which have Jurassic deposits. I’m not sure what it could be… a sauropod scute maybe? No idea. What do you guys think? Regards
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Taxonomy from Mindat.org. Diagnosis from Enay and Hess 1962, p. 662 (translated from french by oilshale): "Small species. Disc granulated on both sides (radial shields included), the granules hiding small imbricate plates. Radial shields and plates articulated by means of two condyles and a facet carried by both the radial shield and the corresponding plate. Radial shields of moderate width, those of the same radius not touching. Ambulacral parts of oral plates or jaws (= oral frames of Matsumoto) without wings. Double peristomal plates. About 6 contiguous oral papillae on each side. Probably no dental papillae. Teeth obtuse, not very strong. Adoral plates in contact proximal to the buccal shield. Brachial spines 3, erect, a little longer than the article. Ventral brachial plates pentagonal, longer than wide, contiguous on half of the arm only. Dorsal brachial plates triangular with a very convex distal margin. Tentacular pores on almost the entire length of the arms, two tentacular scales per pore. Vertebrae with zygospondyle articulation." Kutscher and Röper 1965 note that “Ophiopetra lithographica differs from Sinosura kelheimense, which occurs simultaneously with it, already by the protruding, distinct spines, the non-keeled dorsal shields, the distinct spiny warts and the sickle-shaped bursal spines.” (translated from german by oilshale). References: Enay, R.; Hess, H. (1962) Sur la découverte d'Ophiures (Ophiopetra lithographica ng.nsp.) dans le Jurrassique supérieur du Haut-Valrmomey (Jura méridional). Eclogae geologicae Helvetiae. 55(2), 657-673, pl. I-II. Kutscher, M.; Röper, M. (1965) Die Ophiuren des Papierschiefers von Hienheim (Malm zeta 3, Untertithon). Archaeopteryx, 13: 85-99.
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Old collection specimen. See this Wikipedia page for more information on Araucaria mirabilis from the Jurassic of the Cerro Cuadrado Petrified Forest, Argentina.
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