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

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Amphibia
Amphibia indet. (Linnaeus 1758)
Middle siltstones
Amphibia - Temnospondyli
Archegosauroidea indet. von Meyer 1857
Bed M08/~38
Karpinskiosauridae
Karpinskiosaurus sp. Sushkin 1926
Bed M08/~38
Kotlassidae
Leptoropha sp. Chudinov 1955
Bed M08/~38
Reptilia
Diapsida indet. (Osborn 1903)
Bed M08/~38
Kinelia sp. Bulanov 2002
Bed M08/~38
unclassified
Therapsida indet. (Broom 1905)
Bed M08/~38
Batrachomorpha indet. Säve-Söderbergh 1934
Bed M08/~38
Elonichthyiformes - Varialepididae
Varialepis bergi Minikh 1986
Upper limestones
Varialepis orientalis (Eichwald 1860)
original and current combination Amblypterus orientalis
Middle siltstones; upper limestones
Palaeonisciformes
Amblypterina sp. Berg 1940
Middle siltstones; upper limestones
Amblypterina costata (Eichwald 1860)
Upper limestones
Palaeonisciformes - Platysomidae
Platysomus biarmicus Von Eichwald 1861
Upper limestones
Kargalichthys efremovi Minikh 1986
Upper limestones
Palaeonisciformes - Palaeoniscidae
Palaeoniscum curtum
Upper limestones
Chondrichthyes - Xenacanthiformes - Xenosynechodontidae
Xenosynechodus sp. Gluckman 1980
Upper limestones
Bivalvia - Actinodontida - Palaeomutelidae
Palaeomutela marposadica
Middle siltstones
Palaeomutela sp. Amalitsky 1892
Upper limestones
Palaeomutela wohrmani Netschajew 1894
Middle siltstones
Palaeomutela numerosa Gusev 1990
Middle siltstones
Palaeomutela ulemensis Gusev 1990
Middle siltstones
Palaeomutela subparallela Amalitsky 1892
Middle siltstones
Branchiopoda
Conchostraca indet. Sars 1867
invalid subgroup of Diplostraca
Upper limestones
Ostracoda
Paleodarwinula elongata
Middle siltstones; upper limestones
Paleodarwinula chramovi
Middle siltstones
Paleodarwinula teodorovichi
Middle siltstones
Paleodarwinula fainae
Middle siltstones
Prasuchonella nasalis
Middle siltstones; upper limestones
Prasuchonella cf. stelmachovi
Middle siltstones
Equisetopsida - Sphenophyllales
Sphenophyllum stouckenbergii
Basal siltstones
Sphenopsida
Paracalamites frigidus
Basal siltstones
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:266.90000 - 264.28000 m.y. ago
Stratigraphy
Formation:'Third'
Stratigraphy comments: Mostly Urzhumian beds; the upper 12m of the Third Formation are Severodvinian (Nurgaliev et al. 2015)
Lithology and environment
Primary lithology: sandstone
Secondary lithology: siltstone
Lithology description: "The Third Formation is distinct in the predominance of sandstones and siltstones in the succession. Carbonate beds are rare and thin. Reddish-brown shales and siltstones are most widespread and are usually intercalated by thick lenses of yellowish-brown, obliquely laminated sandstones. Carbonate rocks are represented by grey, nodular, and muddy limestones and marls. The cyclicity of the formation is distinct. Different levels within the formation contain the remains of non-marine bivalves, ostracods, conchostracans, fishes and tetrapods, and the imprints and fragments of plants. Grey and brown siltstones 1-1.5m above the base of the formation contain coaly remains of the trunks of plants. The bed of reddish-brown and greenish-grey siltstone eight metres higher than the previous one contains ostracods, bivalves, rare scales of fishes, and rare amphibian vertebrae. The argillaceous limestone four metres above contains ostracods, the remains of complete fishes, a few small bivalves and conchostracans." (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:197595
Authorizer:A. Dunhill Enterer:B. Allen
Modifier:B. Allen
Created:2018-11-17 07:53:15 Last modified:2018-11-26 12:13:40
Access level:the public Released:2018-11-17 07:53:15
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]