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Found 38 results

  1. 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!
  2. 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!
  3. 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!
  4. 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
  5. 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.
  6. Coroniceras rotiforme (Sowerby 1824)

    From the album Early Jurassic Ammonites from Southern Germany

    20cm. Arietenkalk Formation Sinemurian Found at a construction site in Wellendingen.
  7. Coroniceras longidomus (Quenstedt 1883)

    From the album Early Jurassic Ammonites from Southern Germany

    35cm. Arietenkalk Sinemurian Found on a construction site in Wellendingen, B.-W.
  8. 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!
  9. Arietites bucklandi (Waagen 1869)

    From the album Early Jurassic Ammonites from Southern Germany

    29cm. Arietitenkalk Sinemurian Early Jurassic Found at Trossingen, B.-W.
  10. 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
  11. 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
  12. From the album Early Jurassic Ammonites from Southern Germany

    40cm. With Gryphaea arcuata oysters attached semicostatum zone Sinemurian Found in the Wutach area
  13. Arietites sp. (Waagen 1869)

    From the album Early Jurassic Ammonites from Southern Germany

    35cm. Arietiten Schichten Lias alpha 3 Sinemurian Found in Trossingen
  14. Arietites solarium (Quenstedt 1883)

    From the album Early Jurassic Ammonites from Southern Germany

    33cm. Another one, this time from a construction site in the small town of Behla, Wutachtal. I've enhanced some of the outer whorls and carved the very inner ones on this one.
  15. Coroniceras sp. (Arkell 1947)

  16. Arietites solarium (Quenstedt 1883)

  17. With attached Grypaea sp. bivalves.
  18. Calcirhynchia sp. (Buckman 1917)

    From the album Brachiopoda

    3cm. bucklandi zone Sinemurian Early Jurassic Site: Mundelfingen, Wutach, Germany
  19. Microderoceras sp. (Hyatt 1871)

    From the album Cephalopods Worldwide

    25cm. Early Sinemurian, Early Jurassic (Lias). Provenance unknown.
  20. Microderoceras sp. (Hyatt 1871)

    From the album Early Jurassic Ammonites from Southern Germany

    20cm. From the early Sinemurian in the Wutach area.
  21. Cenoceras sp. (Hyatt 1884)

    From the album Nautiloidea

    25cm. Early Jurassic Sinemurian. From the Wutach area in southwest Germany. I didn't find this myself, just did the prep work, but it turned out so nicely that just had to post it here.
  22. Asteroceras stellare (Sowerby 1815)

    From the album Early Jurassic Ammonites from Southern Germany

    5cm. Sinemurian, obtusum zone, stellare subzone. From the Wutach area.