Bed oWB-9, Wochenberg hill (Jurassic of Germany)

Where: Germany (48.2° N, 8.8° E: paleocoordinates 37.7° N, 18.3° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Achdorf Formation, Opalinum (175.6 - 171.6 Ma)

• Obere Wilflingen-Bank. Viallii horizon, Bifidatum subzone.

• bed-level stratigraphic resolution

Environment/lithology: lithified, nodular, argillaceous marl

• At the left side of our excavation at the southern hillside of the Wochenberg it is developed as a brown calcareous marl (0.1–0.13 m), partly rusty, containing hard, splintery gray limestone nodules almost lacking fossils, only occasionally with shell debris (up to 0.3 m in diameter), with a rusty-brown weathering rim. In the opposite side of our excavation, this bed is thicker (0.2 m) and there, the upper c. 0.05 m of the bed, which is developed as a densely packed bivalve shell bed, are commonly split off. The lower part of the bed (c. 0.15 m) is a gray-bluish limestone.

Size class: macrofossils

Preservation: mold/impression

Reposited in the SMNS

Primary reference: V. Dietze, A. Hofbauer, H. Rieber, N. Wannenmacher, and G. Schweigert. 2022. Ammonites and stratigraphy of the Achdorf Formation (Braunjura Group; Aalenian) at the Wochenberg hill near Schömberg-Schörzingen (W Swabian Alb, SW Germany). Zitteliana 96:69-101 [M. Clapham/M. Clapham]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 228468: authorized by Matthew Clapham, entered by Matthew Clapham on 09.12.2022

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Ammonitida - Graphoceratidae
Ancolioceras citaae, Ancolioceras aff. substriatum, Ancolioceras aff. subacutum, Ancolioceras krymholzi, Ancolioceras subfalcatum, Ancolioceras viallii, Leioceras striatum, Leioceras goetzendorfense, Leioceras capillare
Ancolioceras citaae Geczy 1967 ammonite
Ancolioceras aff. substriatum Buckman 1899 ammonite
Ancolioceras aff. subacutum Buckman 1899 ammonite
Ancolioceras krymholzi Geczy 1967 ammonite
Ancolioceras subfalcatum Buckman 1899 ammonite
Ancolioceras viallii Geczy 1967 ammonite
Leioceras striatum Buckman 1899 ammonite
Leioceras goetzendorfense Dorn 1935 ammonite
Leioceras capillare Buckman 1928 ammonite