Golmud City, Qinghai (No. A), Buqu Formation (Jurassic of China)

Where: China (33.8° N, 91.3° E: paleocoordinates 25.8° N, 88.7° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Buqu Formation, Bathonian (168.3 - 166.1 Ma)

• formation-level stratigraphic resolution

Environment/lithology: platform or shelf-margin reef; lithified, oncoidal, silty limestone and lithified mudstone

• As the greatest production during the marine

•transgression in this area, it is mainly developed as a

•carbonate platform (or gentle slope) sedimentary system,

•including local marine platform facies, open marine platform

•facies, platform marginal facies, fore-platform slope

•facies, and continental shelf sedimentary facies

• The lower limit of this formation is characterized

•by emergence of limestone, whilst the top limit is defined

•by the disappearance of limestone and appearance of

•scarlet mudstone.

Size class: macrofossils

Primary reference: 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]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 127178: authorized by Martin Aberhan, entered by Daniel Wellmanns on 01.05.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Bivalvia
 Arcida - Parallelodontidae
 Pectinida - Entoliidae
 Pectinida - Pectinoidae
 Pectinida - Oxytomidae
"Pteria problematica" = Jianchuania problematica
"Pteria problematica" = Jianchuania problematica Chen 1976 scallop
 Ostreida - Gryphaeidae
 Ostreida - Ostreidae
 Ostreida - Malleidae
"Isognomon (Mytiloperna) bathonicus" = Mytiloperna, "Isognomon (Mytiloperna) patchamensis" = Mytiloperna
"Isognomon (Mytiloperna) bathonicus" = Mytiloperna oyster
"Isognomon (Mytiloperna) patchamensis" = Mytiloperna oyster
 Ostreida - Bakevelliidae
Gervillella orientalis Douvillé 1916 oyster
Gervillella qinghaiensis Wen 1979 oyster
 Ostreida - Pinnidae
 Mytilida - Mytilidae
 Pholadida - Ceratomyidae
 Pholadida - Pleuromyidae
 Cardiida - Neomiodontidae
 Cardiida - Arcticidae
Anisocardia gibbosa, Anisocardia (Anisocardia) togtonheensis, "Anisocardia (Antiquicyprina) trapezoidalis" = Antiquicyprina
"Anisocardia (Antiquicyprina) trapezoidalis" = Antiquicyprina clam
 Cardiida - Quenstedtiidae
 Cardiida - Cardiidae
 Pholadomyida - Pholadomyidae
Cephalopoda
 Ammonoidea -
 Ammonitida - Perisphinctidae