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Found 845 results

  1. Jurassic Shells?

    What are these called and age? They came from Mississippi and I was told they were from jurassic period
  2. I've spent a fair amount of time now combing the beaches around Lyme Regis and Charmouth in Dorset, England, and thought i would put together a topic that presents all of my marine reptile bone finds (so far) in one place. The fossils here are Early Jurassic in age, approx. 195-190 million years old and come predominantly from the Blue Lias and Charmouth Mudstone formations. I first visited this area in 2013 with the simple goal of finding at least one ichthyosaur vertebra, and now after three subsequent trips in 2014, 2017 and 2019, i've put together a far better assortment of finds than i could have possibly hoped for! I think i have been quite lucky along this coastline, although it has taken many hours to amass this collection. Across all four of my England trips i have spent a total of 18 days looking for bones in the Lyme Regis area, most often on the stretch of beach between Lyme Regis and Charmouth but sometimes at Monmouth Beach as well. This coastline also produces a large quantity and diversity of ammonites, belemnites, crinoids, bivalves, brachiopods, gastropods, and even rare insects. However i've always been most interested in fossil vertebrates, and so the ichthyosaurs and plesiosaurs that are found here have been my primary target for collecting. There are also some impressive articulated fish to be found, but as yet i have had no luck in finding any! Ichthyosaur bones are the most common type of vertebrate fossil in the area, particularly their bi-concave vertebrae. Less commonly you can also find pieces of the jaw, sometimes with teeth. If you are extra lucky though you may also find plesiosaur bones, which for whatever reason are much rarer than those of ichthyosaurs. The best way to find any type of marine reptile bone around Lyme Regis is to closely examine the shingle on the beach, and i've spent seemingly countless hours bent over and slowly walking along the shore looking for them. If you have a bad back it's even more difficult! I've learnt that bones can be found pretty much anywhere on the beach: in the slumping clays, at the top of the beach in the 'high and dry' shingle, along the middle of the beach, at the low tide line, and also underwater amongst the rocky pools and ledges. And just when i start to think that the beach has already been heavily searched and there isn't much left to find, there always seems to be another bone that turns up, often lying in plain sight. The truth is that most people who visit here to collect are not experts and will probably walk past a lot of these bones, as the texture is the most important thing that gives them away and learning to recognise it takes a bit of time. For the sorts of articulated skeletons that sometimes make news headlines and are beautifully intact, searching the shingle is not the way to go, but for a short term visitor like me i think it is the best way of maximising the chances of finding any sort of reptile bone in the shortest amount of time (and something i can take back with me on the plane too!). Without further ado, here are the pics (spread across multiple posts due to file size limits). I've also included as-found pictures for some of these finds to provide a sense of what they look like and how they are found when they are on the beach. The collection so far. Starting first with my favourite Lyme Regis fossil, this is a very nice plesiosaur vertebra that is in great condition! A very rare find! I have been very fortunate to find two plesiosaur vertebrae at Lyme Regis so far, although this one is smaller and more beach-worn than the previous example. Continued below.
  3. Ammonite ID (Lyme Regis)

    Hi everyone, I found this ammonite recently on the beach between Lyme Regis and Charmouth in England and was hoping someone might be able to tell me what species or genus this is? It is from the Charmouth Mudstone Formation, and is about 190 million years old. If additional photos are required i can get more. The diameter of the ammonite is approx. 6 cm. Thank you!
  4. Siphuncle

    Hi friends ,Happy new year , can you help me with this ,I went to Jubaila area, mid.Jurassic , to the north of Riyadh and found this large nautilus it was stuck to a hard rock layer , it is 36 cm wide ,21 cm high and 12 cm thick but this not the question , the question is what is the bead like structure in the 2nd photo ????
  5. Hey guy & gals, I am having a problem seeing the "loads of tiny teeth" in the crumpled/chewed up Ichthyosaur rostrum mandible section. Can someone point them out to me? This specimen is from a very reliable dealer. It's from the Lyme Regis, Dorset, England and is Jurassic. I know they're there somewhere but can't seem to find/see them. My age may be effecting my eyesight LOL. By the way, I took these photos with my new Veho VMS-004 microscope recommended by Christian about a month ago. Still trying to get used to it but I think my closeup photos will be better.
  6. Ichthyosaur Collection

    Hi Here’s another fossil I found over Christmas. These bones are pretty rare and are the articulated ischium and pubis from an ichthyosaur. No prep involved apart from cutting the block to size and applying a thin coat of varnish to increase the contrast between the bone and matrix. The fossil is from the Hettangian of Penarth. The block before:
  7. hi guys i recently found this spiny jurassic bivalve, the matrix is very soft (i started prep with a in vise), but the spines are fairly delicate so i felt that wasnt the best method, is there anyone that would be willing to prep it, i can send more photos and the measurements are 11 x 12 x 8 cm, but i am on a low budget so a uk preparator would be favourable but if need be i can ship worldwide (also it has potentially both valves but not sure on that happy christmas will
  8. Ornithischian Vertebra

    Hey everyone, recently came across this partial vertebra from the Kimmeridge Clay online, apparently collected south of Oxford. It measures 9.5cm x 8.5cm. The seller tentatively identified it as a Stegosaurid based on the internal pattern visible on the polished side, and subsequently assigned it to Dacentrurus, since it's the only Stegosaurid fitting the time and location. I tried to find more information on these supposed patterns indicative of Stegosaurs without much success, so I'd like to ask: › Is the vertebra actually identifiable on a family level? › If so, what are the defining characteristics and where could I read up about them? Thanks for your help!
  9. Perisphinctes sp.

    I have this ammonite fossil from the genus Perisphinctes, and I would like to know the species. I bought it online from a guy who said it was from a site (which I do not remember) in Madagascar. Can someone help me?
  10. Frozen Fossils

    Hello, everybody! Today I will present you an unusual way of fossil hunting, popular in Moscow - digging ammonites from under the snow! You'd expect that, wouldn't you? Well, it doesnt always involve snow (but often does), especially this year when we don't have it yet, but the site I will be talking about is available only in winter. The Moskva river level is intentionally dropped for "winter navigation" which typically happens at the end of November. Places located underwater become available which is also the case for Markovo foreshore situated some 40km to the south-east of Moscow. The site is famous for Oxfordian ammonites of great preservation quality. Descent to the river. In summer the water level is hiigh enough to reach the pier.
  11. New Allosauroid from Argentina

    We do not hear much about Jurassic material from Argentina. Presented in this paper is a probable basal allosauroid from the early Middle Jurassic Asfalto Formation of Argentina...let's all welcome Asfaltovenator vialidadi https://www.nature.com/articles/s41598-019-53672-7#disqus_thread Check out those claws
  12. very tiny mosquitos mating?

    People thought in this mid-jurrasic shale piece there is only the travial Estherians, but under the scope, the little stain becomes some thing interesting. It looks no biggerthan the counter-fake little red or green threads in the green buck. actaully the abdomen is only 1mm long, as can be seen in one of the figues.
  13. A few years old (new to me) but very interesting. Jurassic "butterflies" (from before the time of flowers) look like true ones that appeared much later. https://blogs.scientificamerican.com/artful-amoeba/butterflies-in-the-time-of-dinosaurs-with-nary-a-flower-in-sight/?fbclid=IwAR0RxObAJG7LIjG-ZMzvlZYG2mti1zJ0FAMUArv3UXZ6UusoT165IdriJDU
  14. Allosaurus

    So this tooth i have was labeled by the seller as an Allosaurus premax tooth. The tooth is still in the matrix and the tip of it has broken off. The tooth measures 15/16 " long and is from the morrison formation ( bone cabin quarry ) in wyoming.
  15. Quick guide to help identify a few Sauropod teeth from the Morrison Formation. Corrections and additional info always appreciated Please Note: Variations in the morphology of these teeth can vary significantly do to, species, jaw position and ontogenetic changes. This is just a high level guide. Camarasaurus: - Crown is wider than the root - Anterior Teeth are spoon-like and symmetrical, mid and posterior teeth are asymmetrical - The crown enamel ends sharply where the root begins - Wear facet, if present, can be on both sides of the tip From my collection 14.5 cm long and 7 cm long Jaw mechanics showing wear facets Brachiosaurus - Crown are only slightly wider or equal to their root - Teeth are intermediate between spoon-like and peg-like depending on jaw position - The crowns typically have an axial twist relative to the root - Crowns are Conical and Chisel-Shaped - Wear facet, if present, is sharp and at the tip but almost always pointed - The crown enamel blends into the root area. Not has sharp of a cutoff as Camarasaurus From my collection 9.5 cm long From the collection of @hxmendoza from a previous post Jaw mechanics showing wear faceting Diplodocus - Peg-like teeth long and narrow - Slightly curved teeth - Crown enamel blends slightly into the root Jaw Mechanics of Diplodocus showing wear faceting From Supplier, Paleo Gallery Apatosaurus Dont have much published on teeth but from examining ones in my collection they appear to be faceted, grooved toward the base some more than others with sharper edges. More compressed than Diplo. Provided by hxmendoza on a previous post, he made similar comments From Paleo Gallery you can see the faceting References 1) Tooth Replacement of Euhelopus zdanskyi (Dinosauria: Sauropoda) and the Evolution of Titanosaurian Tooth Morphology, Sept 2014 Salakka, Seela 2) Jaw mechanics in sauropod dinosaurs, Jan 1994 Jorge Calvo 3)The dentition of a well-preserved specimen of Camarasaurus sp .: implications for function, tooth replacement, soft part reconstruction, and food intake. NOV 2016 Kayleigh Wiersma P. Martin Sander @Masp hope this helps
  16. Could somebody please explain to me, and possibly show me, the differences between Brachiosaurus vs other sauropod teeth in the Morrison Formation? Since these teeth are so rare I have seen few pics of them. How would one ID?
  17. Here is a large crocodile block which I would like to trade in return for an upper Carboniferous British fossil. I found it at Mappleton, which is part of the Holderness coast, UK. This is by quite some distance the best crocodile fossil I have seen from the Holderness coast, and one of the best I have seen from any part of Yorkshire. I collect mainly Carboniferous fossils, and therefore although it is one of the rarest fossils I have in my collection, I have decided I would like to trade it for something Carboniferous. 22 large bones/skutes are visible on the sides, with a few smaller ones. Most of the remains exposed at the sides seem to be skutes, but there are also what appear to be ribs, a large object which may be a skute but I think it’s another type of bone, and what I think may be a limb bone (visible on last photo). As fossils got to the Holderness coast by glaciers, it’s exact geological origin is uncertain, but I strongly suspect it is from the Lias of North Yorkshire. Due to the very large size of the object, I can only trade it within the UK. Thanks, Daniel Wilby
  18. Exceptional fossils may need a breath of air to form University of Texas at Austin, November 6, 2019 https://phys.org/news/2019-11-exceptional-fossils-air.html https://www.sciencedaily.com/releases/2019/11/191106112109.htm https://www.eurekalert.org/pub_releases/2019-11/uota-efm110519.php Exceptionally preserved Jurassic sea life found in new fossil site by University of Texas at Austin https://phys.org/news/2017-01-exceptionally-jurassic-sea-life-fossil.html The paper is: A.D. Muscente Et Al, Taphonomy Of The Lower Jurassic Konservat-Lagerstätte At Ya Ha Tinda (Alberta, Canada) And Its Significance For Exceptional Fossil Preservation During Oceanic Anoxic Events, Palaios (2019). DOI: 10.2110/Palo.2019.050 https://pubs.geoscienceworld.org/sepm/palaios/article/34/11/515/574686/TAPHONOMY-OF-THE-LOWER-JURASSIC Martindale, R.C., Them, T.R., Gill, B.C., Marroquín, S.M. and Knoll, A.H., 2017. A new Early Jurassic (ca. 183 Ma) fossil Lagerstätte from Ya Ha Tinda, Alberta, Canada. Geology, 45(3). https://par.nsf.gov/servlets/purl/10066020 https://vtechworks.lib.vt.edu/bitstream/handle/10919/81874/Geology 2017 Martindale-2.pdf?sequence=1 Yours, Paul H.
  19. Airabrading at last....

    So for several years i knew that getting better prepresults would have to include a air abrader. With my Junair silent compressor this was problematic as there is not enough airflow, so these last years i was limited to pen work.... A few month’s ago my beloved Junair got a leak in the tank, repair was not very cheap, so i upgraded to a much more powerful compressor, not silent but workable....I also bought a very old Renfert abrader, very cheap, which after replacing the filter set started to work very fine.... So here’s some prep results with this setup. At last i was able to prep a few of my finds from my 2012 trip to the Lafarge quarry at Belmont, France. Allthough i ‘m really happy with the results so far, it’s a very slow process, even with the replaced filterset on the Renfert. Some matrix is just too problematic for this Renfert machine. I’m not sure why, maybe it’s not effective enough, or maybe it’s because the unit is limited to 6 bar, so i cannot push it more..... At the moment i’m waiting my custom build Eckhard Petersen abrader, this unit should cover it. So i hope for more and better pix in the future....
  20. Horseshoe crab or gastropod?

    Hi Is this gastropod or horseshoe crab? Age:Jurassic, Oxfordian Location:Jasna cave, Kraków, Southern Poland
  21. Jurassic fossil bone

    I have found this partial bone into the jurassic (Portlandian) mud of Wimereux yesterday,is it possible to say anything else than fossil bone on it?
  22. It was a Sunny day and we went to the Portlandian beach of Wimereux,northern France Many pelecypods internal mold
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