Where: Heilongjiang, China (47.3° N, 134.2° E: paleocoordinates 50.2° N, 136.8° E)

• coordinate estimated from map

• small collection-level geographic resolution

When: Dong'anzhen Formation (Longzhaogou Group), Valanginian (139.8 - 132.9 Ma)

• single bed in the Upper Dong'anzhen Formation; highly likely that the bed lies within the Valanginian

• bed-level stratigraphic resolution

Environment/lithology: offshore; lithified, argillaceous sandstone

Size class: macrofossils

Primary reference: J. Sha and F. T. Fursich. 1993. Biostratigraphy of the Upper Jurassic-Lower Cretaceous bivalves Buchia and Aucellina of eastern Heilongjiang, northeast China. Geol. Mag. 130(4):533-542 [M. Aberhan/S. Nurnberg]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 59679: authorized by Martin Aberhan, entered by Sabine Nürnberg on 07.04.2006

Creative Commons license: CC BY (attribution)