Lopsiya River, outcrop 41, bed 9 (Jurassic of Russian Federation)

Also known as Bed 13; Bed 8 of Zakharov et al. 2005

Where: Khanty-Mansi Autonomous Okrug, Russian Federation (62.5° N, 60.3° E: paleocoordinates 58.5° N, 56.7° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Aulacostephanus autissiodorensis ammonoid zone, Late/Upper Kimmeridgian (155.7 - 150.8 Ma)

• Kimmeridgian Stage, Upper Substage, Aulacostephanus autissiodorensis Zone, Virgataxioceras dividuum Subzone (upper 1.5 m); thickness: 2.5 m. Zakharov et al. use the faunal lists from Mesezhnikov (1984) and the two sections correspond up to bed 7; after that Zakharov et al. skip or combine Mesezhnikov's beds so Zakharov et al.'s scale is offset by one.

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified, gray, blue claystone

• The explored Kimmeridgian section denuded along the Lopsiya River formed under the embayment conditions of an epicontinental West Siberian sea, covering the territory of more than 2 mln km^2. This Lyapinsky Bay was rather shallow and opened toward the NNE. The narrow band of the Uralian Peninsula seperated it from the Timon-Pechora Sea in the west, and the small Berezovsky Archipelago seperated it from the West Siberian Sea in the east.
• Gray bluish plastic clays. The bed contains flattened round concretions of gray clay limestone to 0.6 m across.

Size class: macrofossils

Collection methods: Repository: VNIGRI

Primary reference: M. S. Mesezhnikov. 1984. Kimeridzhskiy i Volzhskiy Yarusy Severa SSSR 1-224 [M. Clapham/M. Clapham]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 58783: authorized by Martin Aberhan, entered by Sabine Nürnberg on 24.02.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Pectinida - Pectinoidae
"Camptonectes (Camptonectes) cf. lens" = Camptonectes lens
"Camptonectes (Camptonectes) cf. lens" = Camptonectes lens Sowerby 1818 scallop
 Pectinida - Anomiidae
Anomia (Placunopsis) sp. Linnaeus 1758 jingle
 Pectinida - Oxytomidae
Oxytoma sp. Meek 1864 scallop
 Ostreida - Gryphaeidae
Liostrea sp. Douvillé 1904 oyster
 Mytilida - Mytilidae
Modiolus sp. Lamarck 1801 mussel
 Carditida - Astartidae
Astarte (Astarte) lopsiyaensis clam
A. (A.) lopsiyaensis lopsiyaensis
 Cardiida - Tancrediidae
Tancredia sp. Lycett 1850 clam
Cephalopoda
 Belemnitida -
 Ammonitida - Aulacostephanidae
 Ammonitida - Aspidoceratidae
 Ammonoidea -