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Showing results for tags 'blumberg'.
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From the album: Middle Jurassic Ammonites from Southern Germany
5.5cm. herveyi zone Macrocephalen-Oolite Early Callovian Found on a field near Blumberg, S.W. Germany -
From the album: Middle Jurassic Ammonites from Southern Germany
33cm. This one was in several pieces and was missing part of the keel, so I had a bit of glueing, modelling and painting to do on it. retrocostatum zone Late Bathonian Found near Blumberg, SW Germany- 2 comments
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From the album: Slices
10cm. I decided to cut it because of the damage to the shell and I figured that there must be a few good chamber geodes within. herveyi zone macrocephalen oolite Early Callovian Wutach Formation Found on a field near Blumberg in SW Germany. -
From the album: German Gastropods and Bivalves
Diameter 6cm., height 4.5cm. herveyi zone macrocephalen oolite Callovian Wutach Formation Found near Blumberg, SW Germany -
From the album: Middle Jurassic Ammonites from Southern Germany
34cm. Found many years ago at a construction site in Blumberg, B.-W. From the late Bathonian retrocostatum zone. A gift from a friend. -
This ammonite is not perfectly preserved and looks tectonically constricted, which is however not the case. This is a somewhat strange looking genus.
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Calcitized shell.
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With calcitized shell.
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The shell is preserved as calcite. Since this was found on a plowed field it was not possible to determine the exact zone of origin and therefore the species, since many ammonites of this subgenus are quite similar in sculpture and form.
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Peltoceras (Parapeltoceras) sp. (Schindewolf 1925)
Ludwigia posted a gallery image in Member Collections
From the album: Middle Jurassic Ammonites from Southern Germany
8cm. Blumberg. Callovian.- 2 comments
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From the album: Middle Jurassic Ammonites from Southern Germany
5cm. From a field near Blumberg. Macrocephalen oolite, lower Callovian. -
From the album: Middle Jurassic Ammonites from Southern Germany
4.5cm. Another field find from Blumberg. Lower Callovian. -
I had a bit of time on hand on Sunday; actually the whole day. I felt like getting out, but I didn't particularly feel like doing a lot of hammering, prying and clambering about, so I decided to head out to the fields, since this is the time when the farmers plow up a lot of them. I've discovered a "collection" of fields over a few years of sleuthing around the Geisingen and Blumberg areas, so I figured I'd do the tour again. The only thing which is a little strenuous about this kind of activity is bending over and standing up again. Crisscrossing fields in a grid pattern can get a bit boring too by the end of the day, but the air is fresh, the birds are singing and the cats are on the prowl. I covered 8 fields over a stretch of about 7 hours - they lay quite far apart and I have to drive from one to the next - and 5 of them had a few things worth taking. The thing about field finds is that a lot of the fossils laying there are pretty weathered, so a lot gets left behind, but there are almost always a few thing which could do with a closer look in the workshop. Here's what I took home with me. The ones in the first 2 crates come from a pile of blocks which were stacked at the edge of a field near Geisingen. They had obviously been recently cleared off by the farmer. I whacked open a lot of them, thereby discovering some ammonites within a few, as illustrated in the second photo. The stone is pretty hard, lots to remove, and there's some puzzle work to do, so I'll probably save these until last. I'm not even sure if they'll survive the treatment. I started rummaging through the finds today and decided to begin with the ones at the bottom right, since the matrix is relatively soft and easier to work. I chose the one in 2 pieces where you can see the chambers to begin with. First I removed the matrix from the smaller piece and then glued the two pieces together Then I worked a bit more with the air pen, decided to remove the rest of the matrix surrounding the fossil and had a go at it with the air abrader in order to see what shape the shell was in. So far so good...the rest of the work was done rocking back and forth between pen and abrader. I find it's pretty good for a field find, although I still have a few gaps to fill in with stone meal. I'm also not sure about the species, but I'll figure that out later. I'll post this again once it's finished and also the others as I get them done.
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Homeoplanulites (Parachoffiata) funatus (Oppel 1857)
Ludwigia posted a gallery image in Member Collections
From the album: Middle Jurassic Ammonites from Southern Germany
8cm. Found on a plowed field near Blumberg. More than likely Varians-Schichten, Bathonian. -
From the album: Middle Jurassic Ammonites from Southern Germany
6.5cm. Found on a plowed field near Blumberg. More than likely Macrocephalen-Oolith, lower Callovian. -
This sample was also found on a plowed field, therefore the weather has gotten to it somewhat. What is seen is only a part of the phragmocone. These creatures certainly have earned their name. This is the index species for zone and subzone. Lithology: Macrocephalen-Oolith Old German Chronostratigraphy: Dogger (Braunjura) zeta Literature: Dietl, G. (2010): Die Wutach-Formation (clw) des südwestdeutschen Juras - Beschreibung und Gliederung. Jh. Ges. Naturkde. Württemberg. 166. S.5-21
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This sample is quite weathered, since it was found on a plowed field in autumn, but it show clearly the flat discus shape which could reach quite large proportions. This species gives its name to the zone and subzone where it occurs. Old German Chronostratigraphy: Dogger (Braunjura) epsilon Literature: Dietze,V., Schweigert G., Dietl G. (2014): Chrono-/Biostratigraphie im Mitteljura von SW-Deutschland. 2. Teil: Bathonium. Jh. Ges. Naturkde. Württemberg 170/1, S.191-203.