Monastery Ravine, Volga River ('First' Formation): Wordian, Russian Federation

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Elonichthyiformes - Varialepididae
Varialepis bergi Minikh 1986
Varialepis orientalis (Eichwald 1860)
Elonichthyiformes - Acrolepidae
Acrolepis rhombifera Eichwald 1860
Elonichthyiformes - Elonichthyidae
Elonichthys sp. Giebel 1848
Palaeonisciformes - Platysomidae
Kargalichthys efremovi Minikh 1986
Eurysomus sp. Young 1866
Platysomus biarmicus Von Eichwald 1861
Palaeonisciformes
Amblypterina costata (Eichwald 1860)
Palaeonisciformes - Palaeoniscidae
Palaeoniscum cf. kasanense Geinitz and Vetter 1880
Palaeoniscum cf. freieslebeni Blainville 1818
Palaeoniscum kurtum Krotov 1900
Chondrichthyes - Xenacanthiformes - Xenosynechodontidae
Xenosynechodus sp. Gluckman 1980
Branchiopoda
Conchostraca indet. Sars 1867
see common names

Geography
Country:Russian Federation
Coordinates: 55.0° North, 48.9° East (view map)
Paleocoordinates:27.7° North, 43.3° East
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period: Permian Epoch: Guadalupian
Stage: Wordian 10 m.y. bin: Permian 4
Key time interval: Wordian
Age range of interval: 266.9 - 264.28 m.y. ago
Stratigraphy
Formation:'First'
Stratigraphy comments: Urzhumian beds (Nurgaliev et al. 2015)
Lithology and environment
Primary lithology:red "shale"
Lithology description: "Generally, the First Formation is composed of red-bed shales and is distinctly subdivided into two parts. The shales of the lower part of the Formation are gypsiferous, containing many interbeds (3-20cm thick) of grey and pink marls and argillaceous dolomites, more rarely of brown siltstones and sandstones. In the upper part of the Formation, shales are more homogeneous and have a few interbeds of terrigenous and carbonate rocks. The shales often bear thin lenses of palygorskite. Fossils occur rarely in the Formation and mostly in its upper part. The first bed with fossils lies 10m below the top of the Formation and is composed of reddish-brown thinly bedded shales containing small (3-4mm) distorted valves of conchostrachans. Seven metres above this bed, dull-red unbedded shales, along with conchostrachans, contain the isolated scales of fishes. The scales are 2-5mm in size, black, not oriented and regularly distributed in the rock." (Nurgaliev et al. 2015)
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Taxonomic list comments:"This section was repeatedly studied in the course of stratigraphic, lithological (Forsh, 1963, Sementovsky, 1973; Gusev, 1996b,1998b), paleomagnetic (Khramov, 1963, Burov and Boronin, 1977, Gialanella, 1997), and paleontological (Silantiev and Esin, 1993; Esaulova, 1998d, 1999; Esaulova et al., 1998; Larochkina and Silantiev, 2007) works. Recent studies, carried out on the section, revealed a new sedimentological and geochemical features (Arefiev and Silantiev, 2014), clarified the paleomagnetic data (Westfahl, 2005, Balabanov, 2014; Balabanov et al., 2009), allowed supplementing the data on tetrapods, fish and plants (Bulanov, 2014, Minikh and Minikh, 2009, Naugolnykh, 2007 and others), helped to identify and describe the paleosol profiles (Inozemtsev et al., 2011, Mouraviev et al., 2015)." (Nurgaliev et al. 2015)
Metadata
Database number:197593
Authorizer:A. Dunhill Enterer:B. Allen
Modifier:B. Allen
Created:2018-11-17 07:18:19 Last modified:2018-11-26 12:12:43
Access level:the public Released:2018-11-17 07:18:19
Creative Commons license:CC BY
Reference information

Primary reference:
67364. D. K. Nurgaliev, V. V. Silantiev, and S. V. Nikolaeva. 2015. Type and reference sections of the Middle and Upper Permian of the Volga and Kama River Regions: A Field Guidebook of XVIII International Congress on Carboniferous and Permian. 1-208 [A. Dunhill/B. Allen/P. Wagner]