Where: Siberia, Russian Federation (64.0° N, 74.0° E: paleocoordinates 61.1° N, 67.7° E)

• coordinate estimated from map

• small collection-level geographic resolution

When: Ust'-Balyk Formation, Early/Lower Valanginian (140.2 - 136.4 Ma)

• Bed BS8; equivalents of the Propolyptychites quadrifidus zone

• bed-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; lithified, argillaceous siltstone and lithified, fine-grained sandstone

Size class: macrofossils

Collection methods: core,

Primary reference: V. A. Zakharov, V. A. Kazanenkov, and Y. I. Bogomolov. 1999. Biostratigraphy of the Neocomian of the northern Ob' region. Russian Geology and Geophysics 40(8):1117-1129 [M. Aberhan/S. Nurnberg/M. Uhen]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 64299: authorized by Martin Aberhan, entered by Sabine Nürnberg on 06.09.2006

Creative Commons license: CC BY (attribution)