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Showing results for tags 'Jurassic'.
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Taxonomy from Chen et al. 2019. Diagnosis from Wang et al., p. 1233: "Tegmen c. 3.5 times as long as wide, with apex widely rounded; basal cell c. 0.17 times as long as tegmen length, closed with anastomosis; common stalk ScR + M very short; branch ScRA c. 1.5 times as long as stem ScR; stem CuA at base distinctly convex, forking basad of claval apex; stigmal cell narrow, c. half as wide as radial cell." Line drawing from Wang et al. 2012, p. 1227: References: WANG, B., SZWEDO, J. & ZHANG, H. (2012). NEW JURASSIC CERCOPOIDEA FROM CHINA AND THEIR EVOLUTIONARY SIGNIFICANCE (INSECTA: HEMIPTERA) Palaeontology, Vol. 55, Part 6, 2012, pp. 1223–1243] Chen, J., Wang, B., Zheng, Y., Jiang, H., Jiang, T., Zhang, J. Q., An, B. Z. and Zhang, H. C. (2019). New fossil data and phylogenetic inferences shed light on the morphological disparity of Mesozoic Sinoalidae (Hemiptera, Cicadomorpha). Organisms Diversity & Evolution 19:287-302 [M. Clapham/M. Clapham]
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- daohugou
- froghopper
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Hello everyone, and I hope you've had a good weekend. I have purchased this brittle star found in the Solnhofen Limestone. Here are the two images they have provided - in any case, they're probably higher quality than my phone would be able to take. They have labelled it as an unidentified species, and that it is known to have grown to a maximum of 3 centimeters across. The slab my specimen is on is 3 cm itself. What should I label it as in my display cabinet? Thanks for the help, it has been much appreciated over the last few weeks.
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- brittlestar
- echinoderm
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Race to find world's oldest mammal fossils led to academic warfare in United Kingdom
Oxytropidoceras posted a topic in Fossil News
Race to find world's oldest mammal fossils led to academic warfare in the 1970s PhysOrgCom, October 10, 2023 The open access paper is: Benton, M.J., Gill, P.G. and Whiteside, D.I., 2023. Finding the world’s oldest mammals: sieving, dialectical materialism, and squabbles. Zoological Journal of the Linnean Society, p.zlad089. Yours, Paul H. -
Hi, i've taken this near the Jurassic Pterosaur beach in the Department Lot, France. The item is 2 cm at the longent part. On the pièces i"ve taken there are dessication traces and calcite. On one of them i have a partial print and on another i have fossilized rain drops. I wondered if that shape could be the print of a little tridactyl animal which used its heel to walk or if it is geologic. Here it is seen in different angles and with a skirting Light.
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Taxonomy from Fossilworks.org. Etymology: The specific name tenuis, thin, feminine gender of the Latin, referring to the thinness and delicateness of the body. Diagnosis from Zheng et al. 2021, p. 150: "Forewing long (7.9 mm in length), ovipositor sheath as long as M+Cu and strongly narrowed toward acute apex." Line drawing from Zheng et al. 2021, p. 152: Identified by Prof. A. Rasnitsyn, Russian Academy of Sciences. References: Wang M., Shih C.K. & Ren D. 2012. Platyxyela gen. nov. (Hymenoptera, Xyelidae, Macroxyelinae) from the Middle Jurassic of China. Zootaxa 3456 (1): 82–588. Zheng Y., Hu H., Chen D., Chen J., Zhang H. & Rasnitsyn A.P. 2021. New fossil records of Xyelidae (Hymenoptera) from the Middle Jurassic of Inner Mongolia, China. European Journal of Taxonomy 733: 146–159.
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In my opinion, the black colour and the good state of the inner whorls give a more elegant touch to this fossil. I still dont know what type of rock are but its amazing
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Fossils: Boy finds 200-million-year-old ammonite on beach at Vale of Glamorgan, United Kingdom
Oxytropidoceras posted a topic in Fossil News
Fossils: Boy finds 200-million-year-old ammonite on beach By David Grundy, BBC News, United Kingdpm, March 30, 2023 Yours, Paul H.- 1 reply
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- ammonites
- blue lias formation
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hi guys, I am asking your help.... It is quite eroded but im confident that the expertise in the forum could help me identify. It was found in a Jurassic stratification in the south of Europe. Thanks
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Death By Ammonite" Shows Jurassic Fish's Fatal Last Meal 180 Million Years On
Oxytropidoceras posted a topic in Fossil News
'Like swallowing a dinner plate': 180 million-year-old fish may have choked to death on its supersized supper, Ethan Freedman, LiveScience, August 14, 2023 Death By Ammonite" Shows Jurassic Fish's Fatal Last Meal 180 Million Years On Racheal Funnell, IFLscience, August 2, 2023 The open access paper is: Cooper, S.L. and Maxwell, E.E., 2023. Death by ammonite: fatal ingestion of an ammonoid shell by an Early Jurassic bony fish. Geological Magazine, 160(7), pp.1254-1261. Yours, Paul H.-
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- actinopterygian
- ammonites
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Found these ammonites (spiecies?) And also a few of the "flipper" looking one, last picture. I'm wondering what that could be. Part of something or trace of something? Found in svalbard, ymerbukta. Between middle jurassic and early cretaceous.
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Here is a 4.1 cm claw from Madagascar. It's supposedly Jurassic but I'm under the impression that it's easy to mix up Jurassic and cretaceous deposits there,so could this be an abelisaur claw? @Troodon
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At the end of August we went on a quick two day trip to see if the creeks we hunt for Pleistocene megafauna in near Tambar Springs were still full of water. Unfortunately, most of the creeks were still full but we did have one nice section of dry creek bed to walk while we were up there. A lot of the things we find are either shards or particularly robust bones (e.g. kangaroo calcanea), and occasionally jaws or teeth. This is because the material tends to weather out of its original layer and gets redeposited into newer gravelly layers, a process which tumbles and grinds up the fossils. Here are a couple of examples. Bone fragment in situ: Macropod tooth fragment from the same bank: A photo of the gravelly bank the last two specimens were found in. The rocks seem to be a mixture of Tertiary basalt and Jurassic sandstone (also petrified wood). Some of these alluvial gravel layers may still be very old, however the Pleistocene fossils they contain weren't originally deposited in them. Very rarely, we found sections of what I assume is the original fossil containing deposit. It is a soft, sandy clay which has occasional small pebbles and bands of calcrete. It is here we found our best find this trip, a partial wombat (Vombatus sp.) skull! In situ photos: After removing from the bank: A pretty intense storm rolled in that afternoon. Fortunately we missed the bulk of it while we were in the field! More to come...
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Hi all! Today I'll show you a site which is quite similar to the subject of the Frozen Fossils topic, but somewhat opposite of the latter, as it's only accessible in summer (end of July- beginning of September). It's situated in the historical city of Vladimir on the Klyazma river. The banks are overgrown with vegetation, no movement whatsoever on the river and very few people visible. Occasional ducks and herons, fish splashing nearby.The bridge is the only reminder of civilization. The river bed is surprisingly formed of solid clay you can confidently walk on. The age of this clay is Lower Kimmeridgian (mostly the 1st bauhini/baylei zone which is pretty rare in European Russia)
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First-Ever Jurassic Vertebrate Fossils Discovered in Texas
Oxytropidoceras posted a topic in Fossil News
First-Ever Jurassic Vertebrate Fossils Discovered in Texas University of Texas, Austin, Agust 23, 2023 The open access paper is: May, S.R., Bader, K.S., Boucher, L.D., Jacobs, L.L., Lively, J.R., Myers, T.S. and Polcyn, M.J., 2023. A record of Late Jurassic vertebrates from Texas. Rocky Mountain Geology, 58(1), pp.19-37. Another recent open access publication: Cornell, W., Doser, D., Langford, R., Villalobos, J. and Ricketts, J., 2023. The Geology of El Paso. Yours, Paul H.-
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Hello to all. Please help me identify this branch. It was found on the banks of the Kremenchug reservoir in Ukraine. This is a large reservoir, which is adjacent to three regions. It is difficult to determine the age - water erodes the layers from the Neogene period to the Jurassic. Thank you!
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The Ammonite Wall of Digne-Les-Bains: A Closer Look at This Geological Marvel, The Rockseeker Dalle à ammonites - Wikipedia - lots of pictures Another URL A paper is: Bert, D., Bousquet, V., Guiomar, M., Bariani, F., Hippolyte, J.C., Bromblet, P., Garciaz, J.L., Fleury, J., Mathieu, P., Pagès, J.S. and Tardieu, P., 2022. The Geotouristic Project “the Geological Adventure” to the Rescue of an Iconic World Heritage Geosite, the Ammonites Slab of Digne-les-Bains (National Geological Nature Reserve of Haute-Provence and Unesco Global Geopark, France). Geoheritage, 14(3), p.101. PDF of preprint of Bousquet et al. (2022) - Sorry, no figures Abstract and paywalled paper A field trip guidebook that includes the "ammonite slab" is: Livret-Guide d'excursion géologique, congrès de l'Association des paléontologues français, 3-5 Mai 2007 Yours, Paul H.
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- alpes de haute-provence
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From the album: Fossils from the Plattenkalke of the Altmühl Valley
11 cm long partly colored Eryon from Solnhofen with nicely preserved claws and antenna. Seen from the bottom side-
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Found these in Romana, town: Anina. (Eastern Europe). The place is known for plant fossils and other such things. In an article, I saw a journalist say the fossils found there are Jurassic. Are these plant fossils, stems or just markings? I am bad at telling. If it is plant, do you know which one could it be? Bonus one: I am not sure if the order of the pictures will get messed up, but last few pictures I uploaded is a grey "slate" with something in the middle. What is that? If these are just rocks, pretend you've never seen this Thanks!
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An exceptional articulated skeleton of a new basal neornithischian dinosaur, Minimocursor phunoiensis was discovered in the Late Jurassic, Phu Kradung Formation Thailand. Described in this paper https://www.mdpi.com/1424-2818/15/7/851?fbclid=IwAR1DjwFB-QNFRn7hLnnMa0vMToMQhHgHN0XDwEOEX64AzVcfz__HcyxPE6kll @Guns
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- jurassic
- minimocursor phunoiensis
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Taxonomy from Skrzycka, 2014. Coccolepis aniscowitchi Gorizdro-Kulczycka 1926 has been ascribed to the genus Morrolepis, including the junior synonyms Coccolepis socialis, Coccolepis cockerelli and Coccolepis martynovi (Skrzycka, 2014). Emended diagnosis for M. aniscowitchi from Skrzycka 2014, p.15 “Morrolepis having parietal with a slender anterior part extending for two-thirds of its length, with a prolonged antero-medial corner. Amioid scales sensu Schultze (1996) with denticles on posterior margin. Lateral line scales with serration on posterior edge. Maxilla with a prominent postero-ventral corner. Small and irregularly spaced teeth, some minute.” Line drawing from Skrzycka, 2014 p. 20: References: Gorizdro-Kulczycka, F. (1926): Fishes of the Karatau shales. Izvestia Sredne-azjatskogo Komiteta 1, 184–192. [in Russian] Skrzycka, Roksana (2014): Revision of two relic actinopterygians from the Middle or Upper Jurassic Karabastau Formation, Karatau Range, Kazakhstan, Alcheringa: An Australasian Journal of Palaeontology, DOI: 10.1080/03115518.2014.880267
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- aulie
- coccolepis
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Hi guys just wanted to see if anyone could identify it past the current label thanks! @pachy-pleuro-whatnot-odon @Praefectus
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Hello to any fossil enthusiasts reading, I wonder if anyone can help me to identify an intriguing find from Dorset? I'm an absolute beginner in these matters. I found this piece on the shore poking out of some clay, it looks great with lots of bits of old shell and some lovely starfish looking things. It was originally part of a larger brittle rock which came apart, this is the most interesting fragment. What I am really interested in is the fossil to the right of the object which looks a bit like a foot. The "foot" is about an inch in length, although the fact it has six "toes" appears to rule it out as an actual foot. The base of the "foot" is textured like scales. Any thoughts? Right now I can't even be sure it it's animal, vegetable or mineral. Any bonus identifications of the other bits and pieces in the rock would of course be welcome too, but I'm sure I could figure them out.
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Etheldred Benett (1776–1845): lady paleontologist and geologist
Oxytropidoceras posted a topic in Fossil News
Clary, R.M., 2023. Etheldred Benett (1776–1845): The Lady was a Geologist. GSA Today. Vol 33, no. 7, pp. 32-33. PDF of article PDF of full issue Web page of issue Yours, Paul H.- 1 reply
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- chalk marl
- chicksgrove quarry
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Looking for some documents on ammonite species in the charmouth mudstone formation
FossilLerp2 posted a topic in Questions & Answers
Hey everyone, I've been searching for a document or book or anything else that gives an expansive list of ammonite species which can be found in the charmouth mudstone formation or just charmouth and seatown in general. I can't seem to find anything, which seems so weird to me because it is such a well visited location. So if you know or have such a list at hand, please send it to me. Also if someone can provide me with a graph with the biozones and succession at charmouth and the ammonite species like the one I attached (it is for the boulonnais in France), that would be extremely helpful..thumb.png.0599205401a34836c03a5926c0927ed1.png)
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I'd like to start by saying I am a complete novice. But I have always been very interested in prehistoric life and paleontology. After recently getting back into the hobby I researched my local area. I have an interest in marine reptiles and was hoping to find a mostly untouched site with the possibility of finding some. Reviewing various bedrock maps and surveys I found one site that might work. I am aware I will need to review permitting and regulations before doing anything but for now i'd like to just identify areas with potential. I was wondering if anyone would help me assess it given the information I have found. Site description: ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Name Jurassic marine rocks ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Geologic age Devonian to Late Jurassic ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Lithologic constituents Major Sedimentary > Clastic > Sandstone (Bed)Feldspathic to volcaniclastic Metamorphic > Metasedimentary > Metaclastic > Slate Minor Igneous > Volcanic (Pyroclastic) Metamorphic > Metasedimentary > Metaclastic > Argillite Incidental Sedimentary > Clastic > Mudstone (Bed) Metamorphic > Metasedimentary > Metaclastic > Quartzite Sedimentary > Clastic > Conglomerate (Bed) Sedimentary > Chemical > Chert (Bed) Igneous > Volcanic > Mafic-volcanic > Andesite (Flow, Volcaniclastic) Sedimentary > Clastic > Siltstone (Bed) Sedimentary > Carbonate > Limestone (Bed) ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Comments Primarily argillite, slate, feldspathic to volcaniclastic sandstone, and pyroclastic rocks. Includes some rocks of Paleozoic age ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Here is my thinking: The geologic age of the rocks ranges from the Devonian to the Late Jurassic. Marine reptiles, such as ichthyosaurs and plesiosaurs, first appeared in the Late Triassic and continued to evolve and diversify throughout the Jurassic. Therefore, rocks from the Late Jurassic are particularly promising for finding marine reptile fossils. The rock types present at this site also suggest a good chance of finding fossils. A large portion of the site consists of sedimentary rocks such as sandstone, mudstone, conglomerate, siltstone, and limestone. These rock types are known to often contain fossils, as they form from the accumulation of sediment, which can include the remains of organisms. Additionally, the presence of marine sedimentary rocks such as limestone is a strong indicator of a past marine environment, where marine reptiles would have lived. Furthermore, although there is some metamorphic rock present, such as slate and argillite, these are low-grade metamorphic rocks that have undergone only mild metamorphism. This type of metamorphism is less likely to destroy fossils compared to the high-grade metamorphism that produces rocks like gneiss and schist which is common in other formations in the area. The presence of volcanic rocks and pyroclastic suggest some volcanic activity, which can sometimes be associated with excellent preservation conditions if organisms are rapidly buried by ash. I am trying to find pictures of the rocks in the area but it is a bit challenging. I'll update the thread if I can find some decent ones. Please let me know your thoughts on this location from a purely geological perspective. Thank you, -Ged
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