Edited by oilshale
Report Fossil
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By Ludwigia (edited)
Ammonite
Kingdom: Animalia
Eon: Phanerozoic
Era: Mesozoic
Period: Jurassic
Sub Period: None
Epoch: Middle
International Age: Late Aalenian
Achdorf Formation
Collector: Roger Furze
Date Collected: 08/11/2012
Acquired by: Field Collection
Diameter: 23 cm
Scheffheu Section
Wutachtal
Baden-Wuerttemberg
Germany
The samples of this species at this site are practically impossible to extract in one piece due to the large size and the discus-like shape of the fossil and also to the hardness and cleavage of the matrix. Therefore this one was extracted in several pieces which were then glued back together. All remaining cracks and crevices were then filled in with stonemeal. What we see here is just a complete phragmocone, which is apparent through the suture lines visible on the calcite mold seen in the second photo, where the shell broke off during extraction. The complete creature with body chamber probably had a diameter of ca. 40cm. This is the index fossil of this particular horizon. An Homaloteuthis sp. belemnite rostrum is attached at the mouth aperture.
Biostratigraphy: Bradfordensis Zone, bradfordensis subzone, staufensis bank
Old German Chronostratigraphy: Dogger (Braunjura) beta
Literature: Rieber,H. (1963): Ammoniten und Stratigraphie des Braunjura beta der Schwaebischen Alb, Palaeontographica Bd.122,Abt.A, Pp.1-89
Edited by oilshale
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