Search the Community
Showing results for tags 'bradfordensis zone'.
-
Calcite mold. This extremely variable species was newly erected in 2014 by Dietze etal. Literature: V.Dietze etal, Aalenian (Middle Jurassic) ammonites and stratigraphy of the Geisingen clay pit (SW Germany), Palaeodiversity 7: 61–127; Stuttgart 30 December 2014.
-
Calcite mold showing the suture lines of the phragmocone.
-
This is just part of the phragmocone, so it would have been quite large in real life.
-
- a388
- achdorf formation
-
(and 3 more)
Tagged with:
-
This specimen has retained most of the shell on the body chamber and is practically complete, with the exception of the small missing section of whorl which I replaced with stone meal. This was left intentionally so that one can see the repair. It has a calcified internal mold.
-
- a232
- achdorf formation
-
(and 3 more)
Tagged with:
-
Calcite mold.
-
- a36
- achdorf formation
-
(and 3 more)
Tagged with:
-
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
-
- a805
- bradfordensis zone
-
(and 5 more)
Tagged with: