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Found 261 results

  1. Ancient sea creatures spent years crossing the ocean on rafts – we’ve worked out how it was possible. Aaron W. hunter, he Conversation, August 10, 2020 Hunter, A.W., Casenove, D., Mayers, C. and Mitchell, E.G., 2020. Reconstructing the ecology of a Jurassic pseudoplanktonic raft colony. Royal Society Open Science, 7(7), p.200142. Abstract of open access paper PDF of open access paper Yours, Paul H.
  2. A lovely 18" belemnite slab I've bought for my birthday (birthday belemnites are a bit of a tradition!). From the Jurassic Posidonienschiefer (Toarcian, Upper Lias) of Holzmaden - a very interesting and unusual selection of mostly the same species, one with a nice epirostrum. Not quite sure of the actual species, but it's close to Acrocoelites subtenuis and A. gracilis - neither of which usually have epirostra (the squashed bit at the tip of photo 2). It also contains a couple of bonus teeth including a Hybodus type which Sebastian @belemniten tells me is a rarity there. Apart from the fact it's a great display piece, the main reason I bought it is its faunal similarity to the basal beds of the Alum Shales around Whitby in Yorkshire, known as the "Hard Shales" (Toarcian, Bifrons Zone). There, you get accumulations of Acrocoelites subtenuis at the same sort of density - possibly conspecific with these, but never showing an epirostrum. One possible reason for this is that the epirostrum is a sexual dimorphism, connected with breeding grounds, so they only occur in specific areas at any given time. Or it may just be a different species... form with short epirostrum: orthorostrum:
  3. I've just purchased a fine slab of belemnites from Holzmaden and the stratigraphy is given as Posidonienschifer, Lias epsilon II-102. I know that epsilon is Lower Toarcian but please could anyone enlighten me about the II-102? I particularly want to correlate this accurately with Yorkshire, if possible! @belemniten ? EDIT: I've just checked the seller's other material and one that I'd expect to be from the same beds is given as "II-12" - so @oilshale is almost certainly right with his answer below, and it seems to be near the base of the Bifrons Zone.
  4. Holzmaden/Ohmden Fossil ID

    Hey everybody! I had an opportunity to visit the Holzmaden area (fantastic museum) and split some rocks at Schieferbruch Kromer in Germany. There were plenty of ammonites and I even managed a few neat belemnite pieces I'm very happy about. But one find has me a bit stumped. It appears to be very thin, and I have the feeling it is some part of an ammonite but I have no clue where it would fit in since it isn't very spirally. The caliper scale for reference is in mm and inches (it's about an inch long). The last 2 photos are at an angle to show some of the relief. If you've got any suggestions, I'd be happy to hear them, thanks!
  5. Ichthyosaur vertrebra

    From the album Holzmaden

    A 3.7 cm long Ichthyosaur vertebra from the Posidonia shale from the quarry Kromer near Holzmaden. Here two more pictures: And a bad picture of the unprepped vertebra: The stone was extremely hard so the prep work was very difficult.
  6. Ichthyosaur paddle bones

    From the album Holzmaden

    These are four Ichthyosaur paddle bones from the lower Jurassic from the quarry Kromer near Holzmaden. The prep was very difficult because the stone was kinda hard. I gave it up several times but now its finally finished. I hitted the bones a few times so its not the nicest piece. Maybe I will try to prep it from the other side one day. Some more pictures:
  7. Ichthyosaur rib part

    From the album Holzmaden

    A small Ichthyosaur rib part from the lower Jurassic of the quarry Kromer near Holzmaden.
  8. Steneosaurus tooth

    From the album Holzmaden

    A 2 cm long Steneosaurus tooth (crocodile) from the lower Jurassic from the quarry Kromer near Holzmaden (Germany). Sadly its a bit damaged. Another picture:
  9. Ichthyosaur tooth

    From the album Holzmaden

    Here is a 1.5 cm long Ichthyosaur tooth with a nice structure from the lower Jurassic from the quarry Kromer near Holzmaden (Germany). Another picture:
  10.  Saurorhynchus jaw

    From the album Holzmaden

    A 6 cm long Saurorhynchus jaw from the quarry Kromer in Holzmaden (Lower Jurassic, Posidonia Shale).
  11. Ichthyosaur paddle bones

    From the album Holzmaden

    These are four Ichthyosaur paddle bones and another Ichthyosaur bone from the lower Jurassic from the quarry Kromer near Holzmaden. The Ichthyosaur paddle bones are about 5 cm big so not too small. There are also a lot of belemnites on the plate. Because of them the prep work was kinda time intensive. It took about six hours to reveal everything. Here are some more pictures:
  12. Acrocoelites

    From the album Holzmaden

    This is a beautiful 15 cm long Acrocoelites (belemnite) from the lower Jurassic from the quarry Kromer near Holzmaden. Its special because of its great preservation and because it has an enlarged furrow, which was probably caused by an infection or a bite. One of my best belemnites until now! Two more pictures: The enlarged furrow:
  13. Ichthyosaur tooth

    From the album Holzmaden

    Here is a little (about 1 cm long) Ichthyosaur tooth from the lower Jurassic from the quarry Kromer near Holzmaden (Germany).
  14. Steneosaurus tooth

    From the album Holzmaden

    A 2 cm long Steneosaurus tooth (crocodile) with a belemnite fragment from the lower Jurassic from the quarry Kromer near Holzmaden (Germany). Two detailed pictures: Sadly the tooth is broken and a little piece is missng.
  15. Here are two of my best belemnites I found this year in the quarry Kromer near Holzmaden (Lower Jurassic, Posidonia Shale) . I found tons of them this year but mostly they aren't that good preserved. The first one is about 15 cm long and is a relatively new find. I finished the prep yesterday. It's really good preserved and not too short. It should be Acrocoelites because I think I can see three apical furrows. Noticeable is that one of the apical furrows is really big. Maybe @TqB can tell a little bit more about this belmnite? And the second one is a 14 cm long belmnite with a crushed epirostrum. It could be Cuspiteuthis tubularis or a Acrocoelites inaequistriatus (thanks again for the ID Tarquin). Sorry the pictures are not the best but I thought some of you are more interested in seeing some invertebrate stuff from that quarry (normally I show the vertebrate material). Thanks for viewing
  16. Holzmaden Advice

    I will soon be visiting Holzmaden in Germany. Does anyone have any advice on how to find fossils there? (Which quarry to go to, where to look for fossils inside off the quarry, etc.) @belemniten @Ludwigia
  17. Here is a piece with four paddle bones and another bone from a rather big Ichthyosaur. I found it about 2 weeks ago in the quarry Kromer near Holzmaden (Lower Jurassic) and finished the prep today. Overall I spent about 6 hours to prep this one. Especially because of the belemnites. The paddle bones are about 5 cm long. Sadly I forgot to take a picture of the unprepped stone but you could only see the cross sections of the bones on both. But here are some pictures of the progress: Finished: And some detailed pictures: I used air scribes and air abrasion to prep it.
  18. pterosaur bone

    From the album Holzmaden

    This is a 11 cm long pterosaur bone (maybe a flight phalanx) from the lower Jurassic from the quarry Kromer near Holzmaden. It was a very luck find as I found it on a stone, which I took with me because of another fossil. So I am very happy with this find although the preservation is not the best.... Two more pictures:
  19. Steneosaur tooth

    From the album Holzmaden

    A 1 cm long Steneosaurus tooth (crocodile) from the lower Jurassic from the quarry Kromer near Holzmaden (Germany). Another picture:
  20. pterosaur bones (perhaps Dorygnathus)

    From the album Holzmaden

    This is probably one of my best find so far from the quarry Kromer near Holzmaden. Its a plate with some pterosaur bones, which is very rare in Holzmaden as these are marine desposits. The bigger bone might be a Humerus. Before I was able to find this piece I only found a few isolated pterosaur bones. Hopefully I can find a complete one one day The prep of this specimen took about 5 hours. Before the prep it was visible that these are pterosaur bones so I was very surprised ... Some more pictures:
  21. Probably Plesiosaur bones

    From the album Holzmaden

    This seems to be a kinda rare find because maybe these are plesiosaur bones. Plesiosaur is the rarest marine reptile in the area of Holzmaden so I am pretty happy with this find On the plate are two ribs, a phalange and an interclavicle. But I am far away from being with the ID although I already showed it too some local experts. Its from the quarry Kromer near Holzmaden (Lower Jurassic, Posidonia Shale). Unprepped: Some more pictures of the prepped specimen:
  22. Last Sunday I was able to find a piece with some jaw bones and teeth of an Ichthyosaur in the quarry Kromer near Holzmaden. I was very pleased with that find because the situation in the quarry is not the best. There is only a kinda small pile of stones where you are allowed to search (and where you can find marine reptile fossils, in the other regions of the quarry its very unlikely to find a bone or a teeth of a marine reptile). And this pile consists at the moment only out of very small rocks because they were laying until the beginning of the year there. So many collectors already searched there. And it's very likely that they don't get new material in this summer... Here is a bad picture of the quarry: And here are some pictures of the jaw bone with the teeth: The prep work took about 5 hours. It's a pity that I lost that missing part in the quarry. I searched about 1 hour for it but couldn't find it. But at that time I didn't know that its a jaw bone (no teeth were visible). Now about 65 small Ichthyosaur teeth are visible. They are from a very small Ichthyosaur, maybe even from a juvenile!
  23. Crocodile cervical rib

    From the album Holzmaden

    This is a 5.2 cm long cervical rib of a crocodile. Its from the Posidonia Shale (Lower Jurassic) from the quarry Kromer near Holzmaden. Another picture:
  24. Ichthyosaur vertebra

    From the album Holzmaden

    A 3.5 cm long Ichthyosaur vertebra from the Posidonia shale from the quarry Kromer near Holzmaden. Another picture:
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