Wenquangou Formation (Upper Part), Upper Yarkant River, W Xinjiang Province (Silurian to of China)

Where: Xinjiang, China (36.0° N, 78.0° E: paleocoordinates 42.0° S, 106.4° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Wenquangou Formation, Llandovery to Llandovery (443.4 - 427.4 Ma)

• Except where otherwise stated, ref. 7624 uses Lower Silurian as equivalent to Llandovery, Middle Silurian as equivalent to Wenlock, and Upper Silurian as equivalent to Ludlow plus Pridoli. "This formation lies disconformably on the Middle Ordovician. Shelly fossils recovered from the upper part of the formation...suggest and Early to Middle Silurian age."

• member-level stratigraphic resolution

Environment/lithology: marine; gray limestone and gray, green shale

• Correlation chart indicates questioned BA3 based on shelly fauna.
• "The strata consist of dark-gray, thin-bedded limestone, with some gray-green shale, and some crystalline limestone in the lower part, having a total thickness of 2250 m"

Primary reference: E.-z. Mu, A. J. Boucot, X. Chen and J.-y. Rong. 1986. Correlation of the Silurian rocks of China. In A. J. Boucot and W. B. N. Berry (eds.), Geological Society of America Special Paper 202:1-80 [M. Foote/M. Foote/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 27885: authorized by Michael Foote, entered by Michael Foote on 15.01.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Orthocerida - Kionoceratidae
Polygrammoceras sp. Foerste 1927
listed as "Polygramnoceras"
Trilobita
 Phacopida - Encrinuridae
Anthozoa
 Favositida - Favositidae
Favosites sp. Lamarck 1816 tabulate coral