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Showing results for tags 'aalenian'.
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Shell preservation
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Shell preservation.
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From the album: Pisces
Unidentified shark vertebra. 15mm. diameter. An extreme rarity for the Middle Jurassic Late Aalenian in the Wutach valley where it was found. -
A new species not yet named. Described by Gruendel 2011. Literature: Gruendel, Ebert & Furze, 2011. Die Gastropoden aus dem oberen Aalenium von Geisingen (Süddeutschland). Zittelania A51, 99-114.
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As many of you have probably noticed, I've been concentrating my fossil hunting efforts mostly on the Kimmeridgian in the Danube Valley or on the Callovian in the Wutach. Yesterday I felt like having a change of scenerey, so I decided to visit the classic site at Scheffheu in the Wutach Valley. I didn't realize it at the tme, but I hadn't been back there for a day of serious collecting for 5 years. My, how time flies! At any rate, it was amazing to see how the site had changed over these few years. The beaten path up the hill, which leads first through woods and which used to continue on up to the top through stone strewn open spaces was now practically overshadowed with tall shrubs and trees and only opened up at the very top. The exposures were basically the same ones, but some were now covered with debris and others were better exposed due to land slips. Also, some of them which had been composed of steely hard rock which was practically impossible to break into were now sufficiently weathered to be able to have a go at them. This time I thought to take along my camera, so I can give you a few impressions. First, a shot of the exposure in the middle Jurassic Aalenian which I decided after a bit of reconnaissance could be worth a closer investigation. I then decided to create a bench at this spot, which was out of the sun. I could tell by the makeup of the stone that I was in the staufensis Bank and it didn't take all that long before I had found a few ammonites. Yes, it was a little muddy in spots. In situ pics with a few ammos before and after excavation. Even though the matrix was weathered making for cracks, it is still extremely hard, so it's not always possible to extract the fossils in one piece. You just have to make sure to collect up all the bits and then there's some puzzle work to do at home. After a couple of hours at this level, I decided to try get down lower to the next fossiliferous layer, the sinon Banks, which provides a slightly different fauna. I had to remove a few larger blocks to this purpose. It was somewhat tedious, but it worked. Continued....
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From the album: Cephalopods Worldwide
Multiblock with 5 Ludwigella sp. Ammonites from the middle Jurassic concavum zone, upper Aalenian on the Isle of Skye. This species is the microconch to Ludwigia murchisonae.- 2 comments
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- aalenian
- ludwigella
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Phragmocone.
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From the album: Cephalopods Worldwide
7cm. From the Aalenian concavum zone, formosum subzone at Vicarage quarry, Bradford Abbas, Dorset, UK. -
With a phragmocone this size, it must have been quite a large specimen in real life. An extremely rare find for SW Germany.
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This is part of the phragmocone in steinkern preservation. The siphuncle can be seen in the second to last photo. The last photo shows a large specimen with body chamber (22cm.) and a smaller one, which is just the inner portion of the phragmocone (4cm.). Both are from the same site and zone as the first one.
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Phragmocone.
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Mostly phragmocone with a small section of the body chamber.
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Graphoceras (Graphoceras) v-scriptum (Buckman 1888)
Ludwigia posted a gallery image in Member Collections
From the album: Cephalopods Worldwide
8cm. concavum zone, late Aalenian, middle Jurassic. From Horn Park, Dorset, UK. -
Graphoceras (Graphoceras) formosum (Buckman 1888)
Ludwigia posted a gallery image in Member Collections
From the album: Cephalopods Worldwide
15cm. concavum zone, late Aalenian, middle Jurassic. From Horn Park, Dorset, UK. -
This specimen is practically complete.
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This specimen is a microconch.
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Limestone steinkern. Phragmocone and a good portion of the body chamber.
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From the album: Cephalopods Worldwide
4cm. From the concavum zone, late Aalenian at Bradford Abbas, Dorset, UK -
Calcite steinkern. Phragmocone.
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From the album: Cephalopods Worldwide
12.5cm. Calcite Steinkern of the complete phragmocone. Concavum zone, upper Aalenian, middle Jurassic. From the Lower Inferior Oolite Formation at Bradford Abbas, Dorset, UK.-
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- aalenian
- bradford abbas
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From the album: Cephalopods Worldwide
15 cm. From the murchisonae zone, late Aalenian, middle Jurassic at Horn Parl quarry, Dorset, UK. -
From the album: Cephalopods Worldwide
17.5cm. Found in the bradfordensis zone, late Aalenian, middle Jurassic at Horn Park quarry, Dorset, UK. -
Calcite steinkern of the phragmocone, plus an infilled body chamber.
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Calcite mold. Somewhat battered but complete with tube worm passengers.
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This specimen is almost complete. There is a small Graphoceras sp. in the mouth aperture.
