WuLan-YanChiWan (Ordovician of China)

Also known as Yan Chi Wan Group, WuLan-YanChiWan, QingHai Province, China

Where: QingHai, China (37.0° N, 98.0° E: paleocoordinates 30.9° S, 130.8° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Yanchiwan Group, Caradoc (458.4 - 449.5 Ma)

• Thickness of YanChiWan Group is 1530 m; this group is overlain by the Yan Gou Group

Environment/lithology: marine; lithified, pebbly sandstone and metamorphosed, silty, calcareous slate

• Gravel, sandstone, slate interbedded with some fine sandstone and limestone

Size class: macrofossils

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 23595: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 17.07.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

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Trilobita
 Trinucleida - Raphiophoridae
Ampyx sp., Lonchodomas sp.
Ampyx sp. Dalman 1827 trilobite
Lonchodomas sp. Angelin 1854 trilobite
 Asaphida - Remopleurididae
Remopleurides sp.
Remopleurides sp. Portlock 1843 trilobite
 Asaphida - Cyclopygidae
Cyclopyge sp.
Cyclopyge sp. Hawle and Corda 1847 trilobite
Cephalopoda
 Orthocerida -
Cycloceras sp.
Cycloceras sp. M'Coy 1844
 Tarphycerida - Trocholitidae
Discoceras sp.
Discoceras sp. Barrande 1867
Pterobranchia
 Graptoloidea - Dicranograptidae
Dicranograptus sp.
Dicranograptus sp. Hall 1865 graptolite