Derney (Eocene of Russian Federation)

Where: Russian Federation (56.9° N, 63.1° E: paleocoordinates 57.3° N, 57.8° E)

• coordinate based on political unit

• local area-level geographic resolution

When: Tavda Formation, Priabonian (38.0 - 33.9 Ma)

• formation-level stratigraphic resolution

Environment/lithology: marine; sandstone and claystone

• Tavda Formation in the section consists of two beds. The basal 0.4 meter of the sediments are turquoise non-calcareous clays, overlain by bright green non-calcareous clays with numerous beds and lenses of poorly-sorted glauconitic quartz sand. In the upper part of the bed there is a 0.7 meter thick lens of poorly-sorted sand, with phosphate pebbles and nodules in the top. This lens contains a huge number of shark teeth, as well as the bones of bony fish and marine mammals. The clays below and above this lens contains a dinoflagellate assemblage with Charlesdowniea clathrata angulosa indicating a Priabonian age.

Size class: macrofossils

Primary reference: T. Malyshkina. 2006. Late Eocene scyliorhinid sharks from the Trans−Urals, Russia. Acta Palaeontologica Polonica 51(3):465-475 [M. Uhen/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 149626: authorized by Mark Uhen, entered by Mark Uhen on 17.08.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Carchariniformes - Scyliorhinidae
Premontreia (Premontreia) uralica Malyshkina 2006 cat shark
Foumtizia zhelezkoi Malyshkina 2006 cat shark