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

Where: Qinghai, China (33.3° N, 92.0° E: paleocoordinates 25.6° N, 89.4° 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 marl and lithified, silty sandstone

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

Size class: macrofossils

Preservation: mold/impression

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 37883: authorized by Martin Aberhan, entered by Sabine Nürnberg on 27.03.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

 Pectinida - Pectinoidae
Camptonectes (Camptonectes) auritus Schlotheim 1813 scallop
 Ostreida - Pteriidae
Pteria plana Morris and Lycett 1854 pearl oyster
 Ostreida - Bakevelliidae
 Mytilida - Mytilidae
Lycettia cf. lunularis Lycett 1857 mussel
Modiolus (Modiolus) imbricatus Sowerby 1818 mussel
 Carditida - Astartidae
? Astarte sp. Sowerby 1816 clam
 Pholadida - Ceratomyidae
Ceratomya excentrica Roemer 1836 clam
 Pholadida - Pleuromyidae
Pleuromya uniformis Sowerby 1813 clam
 Megalodontida - Ceratomyopsidae
Ceratomyopsis sp. Cossmann 1915 clam
 Cardiida - Neomiodontidae
 Cardiida - Cardiidae
Protocardia (Protocardia) stricklandi Morris and Lycett 1853 cockle
 Pholadomyida - Pholadomyidae
Osteomya dilata Phillips 1829 clam