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Showing results for tags 'lower jurassic'.
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From the album: Holzmaden
A big (28 cm) and not that common Harpoceras falcifer from lower Jurassic in the "Jurafangowerk" near Dormettingen..- 2 comments
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- harpoceras falcifer
- holzmaden
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Leptolepis coryphaenoides from the "Unterer Stein" in Holzmaden. Its a rare find but the most common specimen in this area. The fish is about 7 cm long.
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From the album: Holzmaden
A damaged 0.4 cm long Ichtyosaurus tooth from the lower Jurassic in Holzmaden. -
First record of the Lower Jurassic damselfly Protomyrmeleon brunonis Geinitz, 1887 from Charmouth, UK donated to "Staatliches Museum für Naturkunde Stuttgart". Three wings super-imposed, without body. So far only known from Dobbertin in Mecklenburg, Germany. F. E. Geinitz (1887): Beitrag zur Geologie Mecklenburgs. Archiv des Vereins der Freunde der Naturgeschichte in Mecklenburg 41:143-216
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From the album: Holzmaden
A 7.1 cm long Acroceolites (?) from the quarry Kromer in Holzmaden, Lower Jurassic -
From the album: Holzmaden
A nice Acroceolites with a length of 13 cm from the quarry Kromer in Holzmaden, Lower Jurassic. You can see parts of the phragmocone. -
From the album: Holzmaden
A very damaged and because of that small (0.5 cm long) Steneosaurus tooth from the quarry Kromer in Holzmaden, Lower Jurassic. -
From the album: Holzmaden
A very rare and big 14 cm long Loligosepia aalensis (vampyromorphs) from the quarry Kromer in Holzmaden, Lower Jurassic. -
From the album: Holzmaden
A damaged 1 cm long Steneosaurus tooth from the quarry Kromer in Holzmaden, Lower Jurassic. -
Today i was in the quarry Kromer in Holzmaden (Germany), Lower Jurassic. Shadefully the quarry is closed during winter, so it was probably my last hunt there this year. Because of that i was very motivated to find something good ... The material didnt look bad and there werent many collectors before me there, so good found opportunities. But my hopes were destroyed .... In the first 1-2 hours i only found this two imprints of great Steneosaurus teeth: This two would be great, but i cant find them I was very unhappy until i found THIS ... Its doesnt look good on the pictures, but the original is very pretty and its rare ! A 14 cm long part of a cuttle fish, maybe Loligosepia sp. (?) ....
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- cuttle fish
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From the album: Holzmaden
A interesting 4 cm big Dapedium head plate from the quarry Kromer in Holzmaden, Lower Jurassic. A whole exemplar you can see here. -
From the album: Holzmaden
A nice 1.5 cm long Ichthyosaurus tooth from the quarry Kromer in Holzmaden, Lower Jurassic. -
Today i was about 4 hours in the quarry Kromer in Holzmaden (Germany). In the first three hours i didnt find anything and i was close to give up .... But then I found this wonderful tooth: The tooth is about 1.5 cm long and i think it could be Ichtyosaurus but i am not sure .... I also found this bone with a nice texture ... (4 cm long) Could belong to a fish or ?
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A damaged 1.3 cm long Steneosaurus tooth from the quarry Kromer in Holzmaden (Lower Jurassic).
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A damaged 1.3 cm long Steneosaurus tooth from the lower Jurassic in Holzmaden (Germany).
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Index fossil for the davoe zone.
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Pyritized steinkern under preserved calcitic shell. Index fossil for the gibbosus subzone. Literature: Quenstedt, F.A. (1883-85): Die Ammoniten des Schwäbischen Jura. Bd.1 Der Schwarze Jura (Lias). Schweizerbart'sche Verlag.
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Pyritized steinkern with shell remnants. This species is the index fossil for the margaritatus zone. Literature: Quenstedt, F.A. (1883-85): Die Ammoniten des Schwäbischen Jura. Bd.1 Der Schwarze Jura (Lias). Schweizerbart'sche Verlag.
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Index fossil for zone and subzone. Also known as Harpoceras falciferum. Literature: Howarth, M.K. (1973): The Stratigraphy and Ammonite Fauna of the Upper Liassic Grey Shales of the Yorkshire Coast. Bulletin of the British Museum (Natural History) Geology. Vol.24 No.4 Howarth, M.K. (1992): The Ammonite Family Hildoceratidae in the Lower Jurassic of Britain. Monograph of the Palaeontographical Society.
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This species gives its name to the zone and subzone at the bottom of the lower Toarcian. This very fine-ribbed specimen of the genus Dactylioceras is for me a fine representative for the legend of St. Hilda, the Abbess at the monastery in Whitby ca. 650 A.D. She wanted to build a convent there as well, but the grounds were infested with snakes, so she prayed so intensively that all of the snakes were turned into stone. Since then they are known as snakestones. I found this sample pretty well as is with a head that reminds us of a snake. Literature: Howarth, M.K. (1973): The Stratigraphy and Ammonite Fauna of the Upper Liassic Grey Shales of the Yorkshire Coast. Bulletin of the British Museum (Natural History) Geology. Vol.24 No.4
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This sample still has a white substance covering it which is original shall material. This is the index fossil for the apyrenum subzone. Old German Chronostratigraphy: Lias (Schwarzjura) delta Literature: Simonsen,S. et al (2012): Die Tongrube Buttenheim, 2. überarbeitete Auflage, Verlag Der Steinkern
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Remnants of the original aragonite shell were still on this fossil when found, but they were removed in order to expose the pyritized steinkern mold. The overwhelming majority of the fossils at Buttenheim show this type of preservation, although pure or partial calcite molds also occur. This is also the index fossil for the solare subzone, which is only recognized in Germany. For information on identification of this species see Pleuroceras spinatum under Collections. Old German Chronostratigraphy: Lias (Schwarzjura) delta Literature: Simonsen,S. et al (2012): Die Tongrube Buttenheim, 2. überarbeitete Auflage, Verlag Der Steinkern
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The last three photos show a specimen from the Whitby Mudstone Formation in Yorkshire in pyrite conservation. The diagnosis for distinguishing this species from D.commune, which is quite similar, can be found in the collection here under that species. Literature: Howarth, M.K. (1973): The Stratigraphy and Ammonite Fauna of the Upper Liassic Grey Shales of the Yorkshire Coast. Bulletin of the British Museum (Natural History) Geology. Vol.24 No.4
