Oka River-4 (Cretaceous of Russian Federation)

Where: Russian Federation (54.3° N, 40.3° E: paleocoordinates 47.7° N, 43.1° E)

• small collection-level geographic resolution

When: Berriasian (145.0 - 139.8 Ma)

Environment/lithology: marine; glauconitic, argillaceous sandstone

• lithology described as rust-brown, silty-clayey sandstone, in places phosphoritized with glauconite

Size class: macrofossils

Primary reference: V. N. Saks, ed. 1975. The Jurassic-Cretaceous Boundary and the Berriasian Stage in the Boreal Realm. 1-319 [M. Patzkowsky/K. Layou/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 2513: authorized by Mark Patzkowsky, entered by Karen Layou on 07.07.1999, edited by Austin Hendy

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Pronjaites bidevexus, Pronjaites subpressulum, Externiceras solowaticum, Externiceras mostjae
Bivalvia
 Pectinida - Buchiidae
Buchia volgnesis, Buchia surensis, Buchia expansa, Buchia syzranensis, Buchia terebratuloides
Buchia terebratuloides Lahusen 1888 scallop
Cephalopoda
 Ammonitida - Polyptychitidae
Surites tzikwinianus, Surites spasskensis, Surites clementianus, Surites suprasubditus, Surites subtzikwinianus
Surites tzikwinianus ammonite
originally entered as "Surites tzikwinianus"
Surites spasskensis ammonite
originally entered as "Surites spasskensis"
Surites clementianus ammonite
originally entered as "Surites clementianus"
Surites suprasubditus ammonite
originally entered as "Surites suprasubditus"
Surites subtzikwinianus ammonite
originally entered as "Surites subtzikwinianus"
 Belemnitida - Belemnitidae
Acroteuthis russiensis