Oka River-1 (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, green, argillaceous sandstone

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 2510: authorized by Mark Patzkowsky, entered by Karen Layou on 07.07.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
ex gr. Pronjaites bidevexus
originally entered as "Pronjaites ex gr. bidevexus"
Bivalvia
 Trigoniida - Trigoniidae
 Pectinida - Buchiidae
Buchia fischeriana d'Orbigny 1845 scallop
Buchia volgensis Lahusen 1888 scallop
Cephalopoda
 Belemnitida - Belemnitidae
 Ammonitida - Neocomitidae
aff. Euthymiceras progenitor ammonite
originally entered as "Euthymiceras? aff. progenitor"
Riasanites rjasanensis Lahusen 1883 ammonite
Neocomites sp. Uhlig 1905 ammonite