Where: Russian Federation (75.0° N, 105.0° E: paleocoordinates 75.9° N, 80.0° E)

• small collection-level geographic resolution

When: Bojarkia mesezhnikowi zone, Berriasian (145.0 - 139.8 Ma)

Environment/lithology: marine; lithology not reported

Size class: macrofossils

Collection methods: fauna from either of two types of concretions in layer 4: small, loose concretions of ferruginized coquinoid sandstone or larger concretions of calcareous sandstone

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 2461: authorized by Mark Patzkowsky, entered by Karen Layou on 05.07.1999

Creative Commons license: CC BY (attribution)