Yan Gou Group, WuLan-YanChiWan, QingHai Province, China (Ordovician of China)

Where: QingHai, China (37.0° N, 98.0° E: paleocoordinates 2.3° S, 108.7° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Yan Gou Group, Llanvirn (468.0 - 458.4 Ma)

• Thickness of Yan Gou Group is 1792 m; this group is underlain by the YanChiWan Group

Environment/lithology: marine; lithified, volcaniclastic, gray, green, argillaceous, sandy limestone

• Marine deposits with carbonates
• Grayish-green andesites and other volcanic rocks with limestone, sandstone, and tuff

Primary reference: Stratigraphic Group of GanSu, QingHai, and Tibet Provinces. 1980. Regional Stratigraphic Table of China: Gansu, Qinghai, and Tibet Provinces [A. Miller/P. Novack-Gottshall/M. Clapham]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 23596: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 17.07.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Craniata
 Craniida - Craniidae
Petrocrania sp.
Petrocrania sp. Raymond 1910
Rhynchonellata
 Protorthida - Skenidiidae
Skenidioides sp.
Skenidioides sp. Schuchert and Cooper 1931
 Orthida - Plaesiomyidae
Campylorthis sp.
Campylorthis sp. Ulrich and Copper 1942
Artiopoda
 Agnostida - Metagnostidae
Geragnostus sp.
Geragnostus sp. Howell 1935