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

Show authors, comments, and common names
unclassified
  -
Mactrom yaqinghaiensis, Acromytilus bathonicus
Bivalvia
 Mytilida - Mytilidae
Modiolus (Modiolus) trigonus
 Ostreida - Gryphaeidae
Liostrea zadoensis, Liostrea jiangjinensis, Liostrea birmanica, Praeexogyra acaminata
Liostrea birmanica Reed 1936 oyster
 Ostreida - Ostreidae
Lopha baqensis, Lopha maliensis
 Ostreida - Malleidae
"Isognomon (Mytiloperna) bathonicus" = Mytiloperna, "Isognomon (Mytiloperna) patchamensis" = Mytiloperna
"Isognomon (Mytiloperna) bathonicus" = Mytiloperna oyster
"Isognomon (Mytiloperna) patchamensis" = Mytiloperna oyster
 Ostreida - Bakevelliidae
Gervillella orientalis, Gervillella qinghaiensis
Gervillella orientalis Douvillé 1916 oyster
Gervillella qinghaiensis Wen 1979 oyster
 Ostreida - Pinnidae
Pinna nyainrongensis, Pinna tibetica
 Pectinida - Pectinoidae
Camptonectes lameinatus, Camptonectes (Camptonectes) auritus, Radulopecten shuanghuensis, Radulopecten tipperi
Camptonectes (Camptonectes) auritus Schlotheim 1813 scallop
Radulopecten tipperi Cox 1936 scallop
 Pectinida - Entoliidae
Entolium nieniexionglaensis
 Pectinida - Oxytomidae
"Pteria problematica" = Jianchuania problematica
"Pteria problematica" = Jianchuania problematica Chen 1976 scallop
 Arcida - Parallelodontidae
Grammatodon (Grammatodon) clathratum
 Pholadida - Pleuromyidae
Pleuromya subelongata
 Pholadida - Ceratomyidae
Myopholas multicostata, Ceratomya undulata, Ceratomya bajocina, Ceratomya concentrica
Myopholas multicostata Agassiz 1842 clam
Ceratomya concentrica Sowerby 1822 clam
 Cardiida - Cardiidae
Protocardia hepingxiangensis, Protocardia strickland
 Cardiida - Quenstedtiidae
Quenstedtia oblita
 Cardiida - Neomiodontidae
Neomiodon yanshipingensis
 Cardiida - Arcticidae
Anisocardia gibbosa, Anisocardia (Anisocardia) togtonheensis, "Anisocardia (Antiquicyprina) trapezoidalis" = Antiquicyprina
"Anisocardia (Antiquicyprina) trapezoidalis" = Antiquicyprina clam
 Pholadomyida - Pholadomyidae
Pholadomya qinghaiensis
Cephalopoda
 Ammonitida - Perisphinctidae
Neuqueniceras yokoya, Procerites sp., Choffatia cf. vicenti, Siemiradzkia cf. matisconensis
Procerites sp. Siemiradzki 1898 ammonite