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  1. fifbrindacier

    Ammonite from Ukraine

    Hi guys, i've receiced those ammonites from @Svetlana, they are sinemurian. I tried.to figure out what species they are. Note that the carena is well marked for all of them and they all show costulations. For that first one i found nothing but Oxynoticeras or Asteroceras, i'm absolutely not satisfied about that. For the second one i've found Echioceras rhodanicum And for the third one Orthechioceras maybe cf. viticola
  2. Marco90

    Gryphaea arcuata

    From the album: My collection in progress

    Gryphaea arcuata Lamarck 1801 Location: Baudrecourt, Moselle, Grand Est, France Age: 199 - 190 Mya (Sinemurian, Early Jurassic) Measurements: 6,7 cm (diameter) Kingdom: Animalia Phylum: Mollusca Subphylum: Conchifera Class: Bivalvia Subclass: Pteriomorpha Order: Ostreida Family: Gryphaeidae
  3. Notidanodon

    Belemnites

    Hi guys, I’ve got these 2 belemnites from the sinemurian of Lyme Regis and I was wondering whether it would be possible to put a name on them, thanks 1. 2.
  4. Cliff Hanger

    Ammonite ID

    I would be grateful for help with identification of this ammonite. It is Sinemurian and found in Gloucestershire.
  5. Hello to all. Some photos from a recent trip. Nature is waking up, and the accompanying finds are pleasing to the eye.
  6. Hello all. After a long break, I would like to show some examples of the Sinemurian Jurassic from my collection. The Sinemurian Stage (Sinemur) is a stratigraphic subsection, the second from the bottom stage of the lower section of the Jurassic system of the Mesozoic era. Covers time from 199.3 ± 0.3 Ma to 190.8 ± 1.0 Ma. As far as I know, these fossils are not very widespread. Arietites (Coroniceras)?.. I am not sure about these ammonites
  7. 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
  8. 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.
  9. Ludwigia

    ?Prionorhynchia sp. (Buckman 1917)

    From the album: Brachiopoda

    3.5cm. wide Arietiten Schichten Sinemurian Early Jurassic Found in the Wutach area of southern Germany
  10. Ludwigia

    Asteroceras marstonensis

    A piece of the so-called Marston Magna Ammonite Marble measuring 12 x 7 x 5 cm. These are often polished, creating decorative objects.
  11. From the album: Cephalopods Worldwide

    The largest ammonite has a diameter of 3cm. The block measures 12x7x5cm. These blocks are often cut and polished, hence the name "marble". obtusum zone Marston Magna Marble Sinemurian Early Jurassic Found at Marston Magna, Somerset, England
  12. old digger

    Sinemurian ammonite from Nevada

    This ammonite was found in association with Tmaegoceras nudaries and Coroniceras luningense, indicative of the Mullerense Subzone of the Involutum Zone of the early Sinemurian. The venter is compressed and rounded on early whorls but becomes subquadrate on the outermost preserved whorl, with the strong ribs extending completely over it. Any suggestions as to its genus are most welcome!
  13. Paleoworld-101

    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!
  14. From the album: Early Jurassic Ammonites from Southern Germany

    45cm. Arieten-Schichten Sinemurian Site: Wellendingen, B.-W. Despite the size, this is only a part of the phragmocone. Just imagine how large it must have been including the living chamber!
  15. Ludwigia

    Prepping another big one

    This time it was a large Arietites solarium from the Early Jurassic Sinemurian with a diameter of 60cm. which my friend brought to me. Here's what it looked like towards the beginning of the prep. I had just trimmed off the matrix around the edges and moved on into the whorls a bit with a club hammer and pointed chisel beforehand. I had marked the point with a red line where I figured that the ribs would probably not be there any more and asked him if I should carry on nevertheless and do some carving to finish it off. He agreed, so I carried on. The matrix on these pieces can get very hard and this one turned out to be particularly stubborn. It started to get interesting however as time went on, since pieces of rib were turning up where I hadn't expected them. Just goes to show that even with experience you can make false judgements. Since I didn't want to risk damaging the ribs, I started using the abrader as well as the air pen and moved back and forth between the two. Here's how it looked after about 6 hours. It was getting even more interesting, since the ribs just kept on appearing. But the matrix started to get even harder, so I had to turn the pressure on the abrader up to 8 bar (120psi). It was also getting a little strenuous having to lift up the thing each time I had to clean the powder and grit out of the box in order to refill the abrader tank, so I was having to take a few coffee breaks in between. Here's what it looked like after another 6 hours or so. As you can see, I had discovered more ribs farther along the line. The trick is to try to follow the seam between the outer and inner whorls in order to ascertain what's under the matrix without causing any major damage. You can also see the area in between where there is still some matrix. The problem was that the ribs were there, but they had been pressed quite a bit downwards. I worked along a bit more and then sent him the following photo to ask him if I should carve the matrix within the circle or remove it and also to show him with the red line where I thought that the ribs finally disappeared. He decided that I should carve that spot, which turned out to be the right decision in the end. I then ended up discovering a few rib remnants on the way to the centre, but from there on it was mostly carving with the air pens and then smoothing everything out and removing the excess matrix with the abrader. I still had a bit of work ahead of me filling in gaps and making the odd improvement with epoxy putty. Then balancing the color on the repaired spots and finishing off with my trusty rember beeswax finish. By the time I was finished I had invested 28 hours in getting this guy done, but it sure looks to me like it was worth it. My friend too
  16. From the album: Early Jurassic Ammonites from Southern Germany

    76cm. diameter. bucklandi zone Early Sinemurian This is one of the largest ammonites to date which I've prepped on commission. 26 1/2 hours of work went into this. Below is a photo of how it looked after I was about a third of the way through.
  17. Ludwigia

    Coroniceras rotiforme (Sowerby 1824)

    From the album: Early Jurassic Ammonites from Southern Germany

    20cm. Arietenkalk Formation Sinemurian Found at a construction site in Wellendingen.
  18. From the album: Early Jurassic Ammonites from Southern Germany

    35cm. Arietenkalk Sinemurian Found on a construction site in Wellendingen, B.-W.
  19. Hi everyone, I have recently acquired this Xipheroceras from an old collection... it comes from the upper sinemurian of Burgundy in France. The genus Xipheroceras is easily recognisable by its spines on the edge of the whorls but would you have any idea for the species? I have not found much information for the moment.. there is Xipheroceras ziphus, trimodum, drudrieseri but I have no idea of which it could be and if these are the only species I know but there are maybe more... thanks in advance for your help!
  20. Ludwigia

    Arietites bucklandi (Waagen 1869)

    From the album: Early Jurassic Ammonites from Southern Germany

    29cm. Arietitenkalk Sinemurian Early Jurassic Found at Trossingen, B.-W.
  21. Recently I wasnt very active here but I managed to find a couple fossils in the meanwhile. A week ago I planned to visit the Pliensbach near Holzmaden in Germany. The Pliensbach is a type locality for the so called Pliensbachium, a time period in the lower Jurassic. On the way I saw an old pile with some jurassic rocks and stopped there. Luckily I was able to find some fossils there! Here is a picture of the view I had on the top of the pile: Belemnites are very common there but I found two really nice and big ones. Both are about 15 cm long and they seem to be Acrocoelites(?) ( @TqB ). They are one of my best belemnites until! I also found remains of a very rare layer with many sea urchins and sea urchin spines in it. Too bad I wasnt able to find some urchins but I found some cool plates with many spines. At the top of the pile I found some ammonites from the Sinemurian. I like the pyrite on them! The one I am holding is probably an Oxynoticeras and the other one is a Gagaticeras: Here is an overview: And one more detailed picture: Finally I found a piece of Loligosepia aalensis (vampyromorpha) and some fish rests. Here is a picture of the vampyromorpha: Alter my visit at the pile I was at the Pliensbach for a short time but I didn't really found something I can show. Maybe I will post one or two pictures tomorrow. Thanks for watching
  22. Ludwigia

    Arietites solarium (Quenstedt 1883)

    From the album: Early Jurassic Ammonites from Southern Germany

    46cm. I carved some of the inner ribbing on this one. Arietiten Schichten Sinemurian Found in Trossingen
  23. From the album: Early Jurassic Ammonites from Southern Germany

    40cm. With Gryphaea arcuata oysters attached semicostatum zone Sinemurian Found in the Wutach area
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