Lopsiya River, outcrop 41, bed 10: Early/Lower Tithonian, Russian Federation

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda - Ammonitida - Aulacostephanidae
Eosphinctoceras magnum
Zakharov et al. 2005
Gravesia polypleura Hahn 1963
(1 measurement)
Cephalopoda - Belemnitida
Simobelus (Simobelus) mamillaris
Zakharov et al. 2005 frequent category
Simobelus (Simobelus) insignis
Zakharov et al. 2005 frequent category
Simobelus (Simobelus) intortus
Zakharov et al. 2005 rare category
Pachyteuthis (Pachyteuthis) panderiana
Zakharov et al. 2005 rare category
Pachyteuthis (Pachyteuthis) apiculata
Zakharov et al. 2005 very rare category
Pachyteuthis (Boreioteuthis) explanata
Zakharov et al. 2005 frequent category
Bivalvia - Ostreida - Gryphaeidae
Liostrea sp. Douvillé 1904
Zakharov et al. 2005 frequent category
Bivalvia - Carditida - Astartidae
Astarte (Nicaniella) supraextensa
Zakharov et al. 2005 abundant category
Bivalvia - Thraciida - Thraciidae
Thracia sp. Blainville 1824
Zakharov et al. 2005 rare category
Bivalvia - Nuculida - Nuculidae
Nuculoma sp. Cossmann 1907
Zakharov et al. 2005 rare category
see common names

Geography
Country:Russian Federation State/province:Khanty-Mansi Autonomous Okrug
Coordinates: 62.5° North, 60.3° East (view map)
Paleocoordinates:58.3° North, 56.8° East
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period:Jurassic Epoch:Late/Upper Jurassic
Stage:Tithonian 10 m.y. bin:Jurassic 6
Key time interval:Early/Lower Tithonian
Age range of interval:149.20000 - 146.30000 m.y. ago
Stratigraphy
Stratigraphic resolution:bed
Stratigraphy comments: 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.
Lithology and environment
Primary lithology:gray lithified silty claystone
Lithology description: 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.
Environment:open shallow subtidal
Geology comments: 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.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:paleoecologic analysis
Collection method comments: Repository: VNIGRI
Metadata
Also known as:Bed 14; Bed 9 of Zakharov et al. 2005
Database number:58784
Authorizer:M. Aberhan Enterer:S. Nurnberg
Modifier:M. Clapham Research group:marine invertebrate
Created:2006-02-24 04:58:41 Last modified:2014-11-30 00:16:20
Access level:the public Released:2006-02-24 04:58:41
Creative Commons license:CC BY
Reference information

Primary reference:
53547. M. S. Mesezhnikov. 1984. Kimeridzhskiy i Volzhskiy Yarusy Severa SSSR 1-224 [M. Clapham/M. Clapham]

Secondary references:

16680 V. A. Zakharov, F. Baudin, O. S. Dzyuba, V. Daux, K. V. Zverev and M. Renard. 2005. Isotopic and faunal record of high paleotemperatures in the Kimmeridgian of Subpolar Urals. Russian Geology and Geophysics 46(1):3-20 [M. Aberhan/S. Nurnberg]