Lopsiya River, outcrop 41, bed 7 (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 eudoxus ammonoid zone, Late/Upper Kimmeridgian (155.7 - 150.8 Ma)

• Kimmeridgian Stage, Upper Substage, Aulacostephanus eudoxus Zone; thickness: 2.0 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.
• Gray bluish plastic clays. At the bottom are flattened round concretions of gray clay limestone (to 1 m in diameter) with fauna.

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 58782: authorized by Martin Aberhan, entered by Sabine N├╝rnberg on 24.02.2006, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Pectinida - Entoliidae
"Entolium demissum" = Entolium demissus
"Entolium demissum" = Entolium demissus Phillips 1835 scallop
 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
 Ammonitida - Aulacostephanidae