YinGou Group, ZhangYan Fm., ZhaZiGou and SuBei Counties, QingHai Prov., China (Ordovician of China)

Where: QingHai, China (40.0° N, 95.0° E: paleocoordinates 40.0° N, 95.0° E)

• local area-level geographic resolution

When: ZhongYan Formation, Arenig (478.6 - 466.0 Ma)

• YinGou Group

• formation-level stratigraphic resolution

Environment/lithology: marine; lithified, black, gray, green, yellow limestone and sandstone

• grayish green to yellowish green to black andesitic tuff or lava , limestone with sandstone in middle

Primary reference: Stratigraphic Group of Quing Hai Province. 1980. Regional stratigraphic tables of the north western China region: Volume of NinXia Province. Geological Publishing House, Beijing, China [A. Miller/P. Novack-Gottshall]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 8684: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 24.08.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

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Strophomenata
 Billingsellida - Polytoechiidae
Tritoechia sp.
Tritoechia sp. Ulrich and Cooper 1936
 Strophomenida - Leptellinidae
Toquimia sp.
Rhynchonellata
 Pentamerida - Tetralobulidae
Syntrophopsis sp.
 Pentamerida - Clarkellidae
Syntrophinella sp.
 Orthida - Hesperonomiidae
Hesperonomia sp.
Hesperonomia sp. Ulrich and Cooper 1936
 Orthida - Anomalorthidae
Anomalorthis sp.
Anomalorthis sp. Ulrich and Cooper 1936
 Orthida - Finkelnburgiidae
Finkelnburgia sp.
Finkelnburgia sp. Walcott 1905
Cephalopoda
 Tarphycerida - Trocholitidae
Discoceras sp.
Discoceras sp. Barrande 1867