Zhitkov Fm - South Primorye (Triassic of Russian Federation)

Where: Russian Federation (42.9° N, 132.3° E: paleocoordinates 43.6° N, 110.4° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Zhitkov Formation, Olenekian (251.2 - 247.2 Ma)

• STRATIGRAPHIC RELATIONS: Lower Triassic strata in region are lithostratigraphically divided into the Lazurnaya Bay and Zhitkov Formations in an upward sequence. The Zhitkov Fm overlies the lower Olenekian Lazurnaya Bay Fm. THICKNESS: The Zhitkov Fm is 87.3 m thick in the Abrek Bay region. AGE: Contains an assemblage that suggest an early Olenekian age (upper part of the Hedenstroemia bosphoremsos Zone).

• formation-level stratigraphic resolution

Environment/lithology: offshore; lithified, concretionary, gray, sandy, calcareous siltstone

• ENVIRONMENT: No environmental data reported. Assigned to Siliciclastic offshore on the basis of facies. TECTONIC SETTING: No tectonic data reported in text. SEQUENCE STRATIGRAPHY: No sequence stratigraphic data reported in text.
• GENERAL LITHOLOGY: Dark grey siltstone, with calcareous nodules and intercalations of fine-grained sandstone. LITHIFICATION: Lithified, based on observation of figured specimens.

Size class: macrofossils

Collection methods: COLLECTOR: Collection is a composite based on several workers, none of which are named. REPOSITORY: NSM (National Science Museum, Tokyo); CGM ?

Primary reference: Y.D. Zakharov and Y. Shigeta. 2000. Gyronautilus, a new genus of Triassic Nautilida from South Primorye, Russia. Paleontological Research 4(4):231-234 [A. Miller/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 61961: authorized by Austin Hendy, entered by Austin Hendy on 08.07.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• COMPLETENESS: Not exhaustive (as compiled from previous workers first hand accounts), but fairly complete. NOMENCLATURE: Authoritative text, modern nomenclature. Presumably nomenclature of taxa listed from older collections has been revised.
Show authors, comments, and common names
Bivalvia
 Myalinida - Myalinidae
Promyalina putiatinensis
Promyalina putiatinensis Kiparisova 1938 clam
Cephalopoda
 Ceratitida - Flemingitidae
Flemingites sp.
Flemingites sp. Waagen 1892 ceratite
 Ceratitida - Hedenstroemiidae
Parahedenstroemia conspicienda
 Ceratitida - Paranannitidae
Prosphingitoides magnumbilicatus
 Ceratitida - Arctoceratidae
Arctoceras septentrionale
Arctoceras septentrionale Diener 1895 ceratite
 Ceratitida - Prionitidae
Meekoceras subcristatum, Meekoceras boreale
Meekoceras boreale Diener 1895 ceratite
 Ceratitida - Dieneroceratidae
Dieneroceras sp.
Dieneroceras sp. Spath 1934 ceratite
 Ceratitida - Paranoritidae
Koninckites aff. timorense, Koninckites varaha
Koninckites varaha Diener 1895 ceratite
 Nautilida - Tainoceratidae
Phaedrysmocheilus sp.
Phaedrysmocheilus sp. Shimansky and Erlanger 1955