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Found 13 results

  1. Ludwigia

    Fissilobiceras sp.

    Steinkern.
  2. Ludwigia

    Fissilobiceras sp. (Buckman 1919)

    From the album: Middle Jurassic Ammonites from Southern Germany

    I prepped this ammonite with a diameter of 50cm. for a customer who allowed me to show it here. I had to glue the living chamber back on which was in 2 pieces and also fill a lot of gaps with modelling clay. His wife did a great job at balancing the colors with water paints. This is quite a rare find, particularly at this size. ovale zone Wedelsandstein Formation Early Bajocian From the Wutach Valley
  3. I recieved a large (32cm. in diameter) ammonite on commission recently which turned out to be rather complicated to prepare. It's a Fissilobiceras sp. from the ovale zone in the Early Bajocian from the Wutach valley. Most of it was imbedded in matrix, so it wasn't possible to judge at first in what kind of condition the inner whorls were and it was too fragile to just have a quick go at it with hammer and chisel in order to find out, so I had to take the slower route peeling off layer after layer with the stylus. Here's how both sides looked to begin with. After a good number of hours work with the stylus it became obvious for one thing, that the whorls were beginning to dip deeply down radically on their way to the center and there was less and less separation layer to the steinkern available until it practically completely disappeared, so I figured I'd have to stop at this point with the pen work. I also inadvertently dug out a bit too much due to the deformation. On the positive side, however, the inner whorls turned out to be intact. So I changed over to the abrader to remove the remaining thin matrix layer to get a proper view of the lay of things and to help decide how to continue. The circles and arrows on the last 2 photos were used during the exchange between the owner and myself in order to decide how I should proceed with the work, since these ammonites are not easy to find, particularly at this size, and so we decided in the end to make a matrix display out of it. I then removed the rest of the matrix from above the living chamber until its end and abraded that as well. The last step was to fill the gaps with Apoxie modelling compound and to round things off a bit. Once that was hardened, I balanced the colors with waterpaint and then applied a coat of Rember beeswax finish and the job was done. One interesting thing about this piece is that the border between phragmocone and somewhat flattened living chamber is easy to differentiate. The living chamber would certainly have been larger, but that was all I was able to save, and the whorls at the bottom were practically nonexistent, so I figure I got the best out of this one that I could.
  4. Ludwigia

    Another big one

    I have a very proficient and capable customer (actually he's become more of a friend and colleague with time) when it comes to seeking and finding good fossils, and he struck again last week, bringing me quite a large ammonite with a diameter of ca. 40cm. for preparation. He sent me a photo of it which he took during the extraction procedure. The matrix was pretty tough, so he ended up having to extricate it in several pieces, most of which he glued back together before he brought it to me. I did some stylus work on it to begin with and then we were faced with the decision of whether we should retain the last piece at the end of the living chamber. Either like this: Or like this: We finally decided on the second alternative, since the first would have meant a little too much additional modelling work, so we chucked the piece. We also decided to stick to working on just the one side for two reasons, the first being that it was chock-a-block with oysters and concretions, and the second being that he would have had to pay for a lot more hours of work which probably wouldn't have made all that much difference in the end. Here's a photo of the other side. I then spent a good number of hours with the air abrader on it, alternating back to the fine stylus when necessary in order to remove larger chunks of matrix once I was sure of their position. The abrading was slow going due to the hardness of the matrix, but it was worth having the necessary patience for it as can be seen below. There is a huge tube worm on it and the transition from phragmocone to living chamber can be distinctly seen. The shell is somewhat dented in places, particularly by the inner whorls, but I find that doesn't necessarily detract from the whole picture. I then filled in the gaps with my trusty Apoxie sculpt, painted it and applied the beeswax finish. I also cleaned up the back side a bit. The whole procedure took roughly 10 hours. Here's the final result. Fissilobiceras ovale. 40cm. ovale zone Wedelsandstein Formation Early Bajocian Middle Jurassic From the Wutach area.
  5. From the album: Middle Jurassic Ammonites from Southern Germany

    Fissilobiceras ovale. 40cm. ovale zone Wedelsandstein Formation Early Bajocian Middle Jurassic From the Wutach area.
  6. From the album: Middle Jurassic Ammonites from Southern Germany

    20cm. Wedelsandstein Formation Early Bajocian ovale zone Found in Wutachtal
  7. I've been working on another commission assignment this past week which is pretty interesting, so I figured I'd show the progression here. It's been a somewhat time consuming project, having already spent 16 hours at it. The pen work and abrading is done now, but there's still some repair work to do with epoxy putty which I'll probably get down to tomorrow. This is what I got to begin with. As you can see, the customer had already trimmed off a lot of matrix and had also glued a couple of pieces back on which had broken off during extraction with the exception of the one loose piece to be seen sitting atop the block. The first thing to do was to determine the lay of the fossil and decide where best to get started. I decided to start on the side shown which had at least a few parts exposed, since the reverse side was still covered with a good few centimeters of matrix. I had to be careful around the edges with the break for fear of chipping off some of the shell. It worked out alright in the end, so I also trimmed off most of the matrix on the loose piece and glued it back into place. I then decided to do some abrading before I tackled the other side. And took a "wet look" photo of it when complete before going on. There are three large serpula nestling on the shell. I didn't think to take a photo of the original state, but here is one I took after I was about half way through trimming the reverse side. A few bits of shell had broken off the venter at the top, but I managed to get them glued back into place with no loss of substance. Here it is freed from the matrix before abrading. And here's another "wet look" pic after completion. This is a Fissilobiceras ovale from the Early Bajocian with a diameter of 20cm. I'll post a couple more photos once I'm done with the putty work.
  8. From the album: Middle Jurassic Ammonites from Southern Germany

    40cm. Prepared and restored for a friend by yours truly. trigonalis zone Early Bajocian Found in the Wutach Valley
  9. From the album: Middle Jurassic Ammonites from Southern Germany

    28cm. ovale zone early Bajocian A rare find from Wutachtal. This is just the phragmocone from what once quite a large example.
  10. Together with Sonninia propinquans, a smaller Sonninia sp. and a Chlamys sp. bivalve.
  11. From the album: Cephalopods Worldwide

    15cm. in diameter. Along with an imprint in the mouth aperture and at the right, a Sonninia propinquans, part of the mouth aperture of an ammonite and a Chlamys sp. bivalve. From the laeviuscula zone, early Bajocian in Dorset, England.
  12. Ludwigia

    Fissilobiceras sp. (Buckman 1919

    Shelled phragmocone with most of the living chamber intact.
  13. Ludwigia

    Fissilobiceras sp. (Buckman 1919)

    From the album: Cephalopods Worldwide

    17cm. Laeviuscula zone, early Bajocian. From the Sherborne area, Dorset, England.
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