Kendlbachgraben, Kendlbach Fm, Sample 1 (Triassic of Austria)

Where: Austria (47.7° N, 13.4° E: paleocoordinates 30.7° N, 17.5° E)

• coordinate estimated from map

• small collection-level geographic resolution

When: Tiefengraben Member (Kendlbach Formation), Rhaetian (208.5 - 201.3 Ma)

• The distance given is form the base of the Kendlbach Fm.

• bed-level stratigraphic resolution

Environment/lithology: marine; black mudstone

• ... a relatively thin (3–5 cm) very resistant black and often laminated mudstone with phosphatic fish remains, rare Lingula, and at several sections, thin pavements of bivalves. This distinctive bed, rich in Corg, referred to as the T bed (e.g., Hillebrandt et al., 2007; Hillebrandt and Krystyn, 2009), represents a condensed horizon of the early transgressive system tract. Additionally, the T bed has a distinct REE (rare earth element) signature enriched in heavy REEs and a clay mineralogy (high-charged smectite accompanied by vermiculite) that suggests alteration products of mafic rocks and a potential signature of airborne fallout from CAMP volcanism (Palfy and Zajzon, 2012).

Size class: macrofossils

Collection methods: bulk, mechanical,

• A majority of sampled horizons were collected in situ from 1 to 2 m2 bedding plane surfaces and subsequently identified and tallied in the field with representative slabs returned to the laboratory for further mechanical preparation and study. Individual shell beds were consistently ,1 cm thick and were treated as occurring on a single bedding plane. Specimen counts for shell beds are species abundances based on individual specimens per standardized surface area (1 m2).

Primary reference: C. A. McRoberts, L. Krystyn, and M. Hautmann. 2012. Macrofaunal response to the end Triassic mass extinction in the West-Tethyan Kössen Basin, Austria. Palaios 27:607-616 [M. Aberhan/T. Schossleitner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 138268: authorized by Martin Aberhan, entered by Thomas Schossleitner on 08.01.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Pectinida - Pectinoidae
Agerchlamys textoria scallop
<5 individuals per square meter