Search the Community
Showing results for tags 'bajocian'.
-
Lincolnshire Limestone, Oolite Group, Middle Jurassic, Bajocian Im not sure what to make of this, was thinking maybe fish fragment. Particularly puzzled by the circular pattern. I've dampened it with water to help it show more clearly in the photo. Scale is mm.
-
From the album: Sketches
The original is from the laeviuscula zone, trigonalis subzone of the Middle Jurassic Early Bajocian at Sherborne, Dorser, GB. -
This time around I chose another of my favorite Ammonites from Dorset for the model. It's a Shirbuirnia trigonalis from the Early Bajocian laeviuscula zone from Sherborne, Dorset. This took a while trying to get all the sutures right.
-
From the album: Sketches
This Emileia contrahens ammonite is one of my all-time favorites from the fauna out of the Early Bajocian. It was found in the Laeviuscula zone in the region around Sherborne, Dorset, GB. I recieved it unprepped along with some other raw material from a befriended British paleontologist who gave me the samples in exchange for some prep work which I was doing for him at the time. The small ammo on the matrix at the bottom is an Euhoploceras modestum. -
This Emileia contrahens ammonite is one of my all-time favorites from the fauna out of the Early Bajocian. It was found in the Laeviuscula zone in the region around Sherborne, Dorset, GB. I recieved it unprepped along with some other raw material from a befriended British paleontologist who gave me the samples in exchange for some prep work which I was doing for him at the time. I figured I'd turn this into my next sketching project. The small ammo on the matrix at the bottom is an Euhoploceras modestum. And here's the original photo for comparison.
-
From the album: Sketches
ø 4.5cm. Male microconch to its macroconch Stephanoceras. Found a few years back in Canton Baselland in Switzerland. Middle Jurassic Bajocian humphriesianum zone.-
- 2
-
-
-
- bajocian
- normannites
- (and 1 more)
-
This little fellow ( ø 4.5cm.) won a couple of prizes here a few years back, so I figured it was time to duplicate him on paper. It's a complete male microconch specimen to the species called Stephanoceras and has its own name as a sub-species thereof: Normannites sp. The "ears", a characteristic which many male ammonites wear, are called lappets and there are a number of theories which try to explain their existence which I won't go into here.
- 7 replies
-
- 19
-
-
-
- bajocian
- normannites
- (and 1 more)
-
From the album: German Gastropods and Bivalves
11x8cm. Humphriesianum zone, Bajocian, Middle Jurassic. Found on a field near Oefingen, B.-W., Germany. -
From the album: Sketches
The original was found on a field near Geisingen, Baden Wuerttemberg, Germany which exposes the Middle Jurassic Bajocian humphriesianum zone.-
- 2
-
-
- actinostreon
- bajocian
- (and 1 more)
-
From the album: Sketches
The original comes from the Middle Jurassic Bajocian humphriesianum zone near Ruenenberg, Canton Basil, Switzerland.-
- 2
-
-
- bajocian
- humphriesianum
- (and 1 more)
-
This time I chose a Stephanoceras humphriesianum from the Swiss Middle Jurassic. Didn't quite get the proportions right this time. The thing has so many ribs that I kept on losing my orientation and missed out on a couple and rotated it all a bit. But at least it looks ok, despite the fact that I didn't manage to copy it perfectly.
- 8 replies
-
- 11
-
-
- bajocian
- stephanoceras
- (and 1 more)
-
From the southern edge of the Sierra de la Demanda.
-
Junior synonym: Melendezia
-
- 1
-
-
- bajocian
- phlycticeras
- (and 1 more)
-
From the album: Middle Jurassic Ammonites from Southern Germany
Late Bajocian. garantiana zone. Found on a field near Geisingen, Baden-Wuerttemberg -
Bajocisphinctes bajociensis (Siemiradzki 1899)
Ludwigia posted a gallery image in Member Collections
From the album: Cephalopods Worldwide
ø 7cm. Late Bajocian Middle Jurassic Location: Aldea del Pinar, Hontoria, Asturias, Spain -
Phlycticeras aenigmaticum (Fernández-López 1985)
Ludwigia posted a gallery image in Member Collections
From the album: Cephalopods Worldwide
ø 4cm. garantiana zone Late Bajocian Middle Jurassic Location: Aldea del Pinar, Hontoria, Asturias, Spain Junior Synonym: Melendezia -
From the album: Cephalopods Worldwide
ø 3.5cm. Late Bajocian Middle Jurassic Location: Aldea del Pinar, Hontoria, Asturias, Spain -
Hi all, Last part of my finds of the year. In autumn, between lockdown 1 & and lockdown 2, we managed another 3 days hunts. First day was spent in our usual trilobites spot, which happened to be on the way to our main destination this time. You have already seen in my first part some of the trilos we did find on that day, which was a rather good one for me. Day two was spent in Nanteuil quarry not far from Niort. the quarry got mostly bajocian and aalenian. the aalenian is on the "ground of the quarry" and was mostly drown at that time of year. So Bajocian that was. An explosion had occured recently so we had quite some material to process. Most of the ammos there have no heart, which is quite frustrating, but from time to time, you can fine a pretty one. 2 finds on that day : Normannites sp ammonite A huge not yet determined nautiloid (not the usual cenoceras we find there) We kept going till 18h30 then it was time for a shower at the hotel and a meal at the restaurant. -
From the album: 2020, a year in review - 3 : cephalopods & gastropods
a Normannites ammonite from Saint-Laon (France) - Bajocian - collected in october 2020 -
From the album: Middle Jurassic Ammonites from Southern Germany
ø35cm. laeviuscula zone, Early Bajocian, Wedelsandstein Formation Found in the Wutach area With a Chlamys textoria perched at the edge of the living chamber in the photo below.-
- 1
-
-
- bajocian
- shirbuirnia
- (and 1 more)
-
Steinkern.
- 3 comments
-
- 1
-
-
- bajocian
- fissilobiceras
- (and 1 more)
-
Collected in 3 pieces and repaired.
-
- 1
-
-
- bajocian
- pseudoshirbuirnia
- (and 1 more)
-
Pseudoshirbuirnia oechslei (Dietze et al 2005)
Ludwigia posted a gallery image in Member Collections
From the album: Middle Jurassic Ammonites from Southern Germany
30cm. ovale zone Early Bajocian Wedelsandstein Formation From the Wutach area -
My customer/friend, let's just call him X. for now, brought me another large ammonite which he had recently pryed up for prep. He got this one out in 3 pieces, 2 of which he glued back together. The ammonite itself has a diameter of 30cm. Here's what I was faced with to begin with (Well almost. I took the pics after I had started in with the stylus.) The 1st pic shows them side by side, the 2nd in original position and the 3rd the reverse side. S. first had the wish that I remove it completely from the matrix, but I wasn't so sure about the chances of success there. For one thing, there were a lot of cavities in the phragmocone, and due to the hardness of the matrix, there was a good chance of breakage under way. There was also a heckuva lot of matrix above and below the fossil, so I knew that this was going to take a loooong time, even with the strong jack stylus. I decided to get started with the larger block and set aside the smaller one for the time being. After a few hours of plugging away with the air pen, it also became obvious that there was no proper separating layer between matrix and fossil, which made for even more time consumption and finesse. Here's how both sides looked at that point. I then decided that it was time to swap over to the air abrader, since I wasn't quite certain how the lay of the land was. There were a lot of oysters and tube worms clinging to the shell which made it difficult in some places to make a judgement as to where the ammonite shell actually started. As you can see in the next two photos, I continued on with the stylus after the abrading was done. 2nd pic in next post.
- 19 replies
-
- 5
-
-
- bajocian
- pseudoshirbuirnia
- (and 1 more)
-
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.
- 11 replies
-
- 11
-
-
- bajocian
- fissilobiceras
- (and 1 more)
