Lopsiya River, outcrop 41, bed 4 (Jurassic of Russian Federation)

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 sosvaensis ammonoid zone, Late/Upper Kimmeridgian (155.7 - 150.8 Ma)

• Kimmeridgian Stage, Upper Substage, Aulacostephanus sosvaensis Zone; thickness: 4.0 m

• 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.
• Dark-gray bluish plastic clays. At the bottom of the bed are elongate ellipsoid concretions of of gray clay limestone. Smaller concretions are scattered over the bed. At the level 0.7 m from the bottom is a thin interbed of sandy silt with coal and small calcareous nodules.

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 58779: authorized by Martin Aberhan, entered by Sabine Nürnberg on 24.02.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Arcida - Parallelodontidae
 Pectinida - Pectinoidae
"Camptonectes (Camptonectes) cf. lens" = Camptonectes lens
"Camptonectes (Camptonectes) cf. lens" = Camptonectes lens Sowerby 1818 scallop
 Ostreida - Gryphaeidae
Liostrea sp. Douvillé 1904 oyster
 Ostreida - Pinnidae
Pinna sp. Linnaeus 1758 oyster
 Carditida - Astartidae
Astarte (Astarte) lopsiyaensis clam
A. (A.) lopsiyaensis lopsiyaensis
 Pholadida - Pleuromyidae
Pleuromya sp. Agassiz 1845 clam
 Thraciida - Thraciidae
Thracia sp. Blainville 1824 clam
 Nuculida - Nuculidae
Nuculoma sp. Cossmann 1907 nut clam
Cephalopoda
 Belemnitida -
 Ammonitida - Cardioceratidae
Amoeboceras (Amoebites) kitchini Salfeld 1915 ammonite
 Ammonitida - Aulacostephanidae