Lopsiya River, outcrop 41, bed 10 (Jurassic of Russian Federation)

Also known as Bed 14; Bed 9 of Zakharov et al. 2005

Where: Khanty-Mansi Autonomous Okrug, Russian Federation (62.5° N, 60.3° E: paleocoordinates 58.3° N, 56.8° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Early/Lower Tithonian (150.8 - 145.0 Ma)

• Volgian Stage, Lower Substage, Eosphinctoceras magnum Zone; thickness: 2.0 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. Mesezhnikov sometimes refers to this as bed 14 (presumably of the combined section), but it is bed 10 at outcrop 41.

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified, gray, silty 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 silty clay. The basal part embraces concretionary interbed of gray massive limestone, ocasionally thinning out and is taceable as a loose shelly interbed. Small (up to 0.15 m) round and fusiform limestone concretions are scattered over the bed.

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 58784: authorized by Martin Aberhan, entered by Sabine Nürnberg on 24.02.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Ostreida - Gryphaeidae
Liostrea sp. Douvillé 1904 oyster
 Carditida - Astartidae
 Thraciida - Thraciidae
Thracia sp. Blainville 1824 clam
 Nuculida - Nuculidae
Nuculoma sp. Cossmann 1907 nut clam
Cephalopoda
 Belemnitida -
 Ammonitida - Aulacostephanidae
Gravesia polypleura Hahn 1963 ammonite
 Ammonoidea -