Tanggula Mountains, Quemuoco Section, Matuo Formation (Jurassic to of China)

Where: Qinghai, China (33.3° N, 91.3° E: paleocoordinates 25.6° N, 88.8° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Matuo Formation (Yanshiping Group), Bajocian to Bajocian (170.3 - 164.7 Ma)

• GENERAL COMMENT: bivalves are not evenly distributed throughout the sequence, but are concentrated at certain horizons, large parts of the sedimentary sequence in between being unfossiliferous.

• formation-level stratigraphic resolution

Environment/lithology: marginal marine; lithified sandstone and lithified marl

• The province represents extensive marginal marine environments ranging from nearshore shelf to restricted embayments, lagoons and freshwater lakes.
• The Matuo Fm at Quemuoco is composed of silty and fine-grained sandstones and marls.

Size class: macrofossils

Collection methods: chemical, mechanical,

• focus on bivalves

Primary reference: J. Yin and F. T. Fürsich. 1991. Middle and Upper Jurassic bivalves from the Tanggula Mountains, W-China. Beringeria, Würzburger geowissenschaftliche Mitteilungen 4:127-192 [M. Aberhan/S. Nurnberg/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 37888: authorized by Martin Aberhan, entered by Sabine Nürnberg on 27.03.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Ostreida - Pteriidae
Pteria plana Morris and Lycett 1854 pearl oyster
 Mytilida - Mytilidae
Modiolus (Modiolus) imbricatus Sowerby 1818 mussel
 Carditida - Astartidae
? Astarte sp. Sowerby 1816 clam
 Cardiida - Neomiodontidae