Golmud City, Qinghai (No. A), Qoimaco Formation: Bajocian, China

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Pectinida - Anomiidae
Placunopsis sp. Morris and Lycett 1853
Bivalvia - Pectinida - Propeamussiidae
Propeamussium (Propeamussium) pumilum
original and current combination Pecten (Propeamusium)
Bivalvia - Pectinida - Pectinidae
Camptonectes (Camptonectes) auritus (Schlotheim 1813)
Bivalvia - Ostreida - Bakevelliidae
Kobayashites sp. Hayami 1959
Kobayashites cf. hayamii Yin 1988
Bivalvia - Mytilida - Mytilidae
Lycettia sp. Cox 1937
Modiolus sp. (Lamarck 1801)
Bivalvia - Pholadomyida - Pholadomyidae
Homomya sp. Agassiz 1843
Bivalvia - Cardiida - Arcticidae
Anisocardia (Anisocardia) togtonheensis
Bivalvia - Cardiida - Quenstedtiidae
Quenstedtia sp. Morris 1854
see common names

Geography
Country:China
Coordinates: 33.8° North, 91.3° East (view map)
Paleocoordinates:26.2° North, 88.8° East
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period:Jurassic Epoch:Middle Jurassic
Stage:Bajocian 10 m.y. bin:Jurassic 4
Key time interval:Bajocian
Age range of interval:170.30000 - 168.30000 m.y. ago
Stratigraphy
Formation:Qoimaco
Stratigraphic resolution:formation
Lithology and environment
Primary lithology:gray,red lithified silty sandstone
Secondary lithology: lithified breccia
Lithology description: This formation is composed mainly of dark red, scarlet, grey, dark grey detritus-quartzsandstone, quartz-sandstone, siltstone; the bottom is formed by polymict breccias, with rare oospararenite and finegrained calcarenite in the lower part and carbonate fine conglomerat
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:paleoecologic analysis
Metadata
Database number:127175
Authorizer:M. Aberhan Enterer:D. Wellmanns
Modifier:D. Wellmanns Research group:marine invertebrate
Created:2012-05-01 00:21:04 Last modified:2012-04-30 09:23:38
Access level:authorizer only Released:2017-05-01 00:21:04
Creative Commons license:CC BY
Reference information

Primary reference:

41317. H. Z. Yao, R. J. Zhang, Q. F. Duan, X. C. Sheng, Z. J. Niu, J. X. Wang, B. F. Zeng and J. H. Wu. 2011. Jurassic rocks, bivalves, and depositional environments of the source area of the Yangtze River, Qinghai Province, western China. Sci China Earth Sci 54(8):1136-1148 [M. Aberhan/D. Wellmanns]