Also known as Assemblage III

Where: China (28.1° N, 86.0° E: paleocoordinates 42.9° S, 46.0° E)

• local area-level geographic resolution

When: Guchuochun Formation, Berriasian (145.0 - 139.8 Ma)

• STRATIGRAPHIC RELATIONS: From Guchuochun Fm, which overlies the Tithonian Upper Shuomo Fm. THICKNESS: From 45 m thick unit, within ~300 m thick exposure of Guchuochun Fm. AGE: Berriasian. STRATIGRAPHIC POSITION: From middle unnamed member of Guchuochun Fm, immediately above PBDB# 64826.

• group of beds-level stratigraphic resolution

Environment/lithology: deep-water; poorly lithified, concretionary siltstone

Size class: macrofossils

Collection methods: COLLECTOR: Collected during 1980-1981; reported by Gou and Li, 1983. REPOSITORY: Beijing Graduate School, Wuhan College of Geology, China.

Primary reference: L. Xiaochi and J. A. Grant-Mackie. 1988. Upper Jurassic and Lower Cretaceous Buchia (Bivalvia) from southern Tibet, and some wider considerations. Alcheringa 12:249-268 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 64825: authorized by Austin Hendy, entered by Austin Hendy on 17.09.2006

Creative Commons license: CC BY (attribution)