Unit 20, Tongzhi Fm., Guangyingqiao and Qijiang, Sichuan Prov., China (Ordovician of China)

Where: Sichuan, China (29.0° N, 107.0° E: paleocoordinates 20.8° N, 144.3° E)

• local area-level geographic resolution

When: Tongzi Formation, Tremadoc (485.4 - 477.7 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified limestone and shale

• limestone and shale

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 5418: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 02.10.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

 Asaphida - Asaphidae
Psilocephalina sp. Hsu 1948 trilobite
 Modiomorphida - Modiomorphidae
Modiolopsis sp. Hall 1847 clam