Unit 4, Tongzhi Fm., Honghuayuan and Tongzhi, Guizhou Prov., China ( of China)

Where: Guizhou, China (28.0° N, 107.0° E: paleocoordinates 21.4° N, 143.4° E)

• local area-level geographic resolution

When: Tongzi Formation, Tremadoc (486.5 - 477.7 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: offshore shelf; lithified mudstone and limestone

• muddy shale and limestone

Primary reference: R. Wang. 1981. Stratigraphic Summary of the Southwestern Region of China. Institute of Geology and Mine Deposit at Chengdu, Ministry of Geology (not published, copy of article deposited with A. I. Miller at the University of Cincinnati, received through S. Mao) 14-61 [A. Miller/P. Novack-Gottshall]more details

PaleoDB collection 5281: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 12.09.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Eocrinoidea
 Imbricata -
Imbricata indet. Sprinkle 1973
Trilobita
 Asaphida - Asaphidae
Asaphellus sp. Callaway 1877 trilobite
 Asaphida - Remopleurididae
Lohanpopsis sp. Lu 1965 trilobite
 Olenida - Olenidae
Chungkingaspis sp. Lu 1962 trilobite