Where: Gansu, China (39.8° N, 97.7° E)

• Paleocoordinates: 9.5° N, 122.6° E (Wright 2013)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Hanxia Formation, Ludlow to Ludlow (427.4 - 419.2 Ma)

• Except where otherwise stated, ref. 7624 uses Lower Silurian as equivalent to Llandovery, Middle Silurian as equivalent to Wenlock, and Upper Silurian as equivalent to Ludlow plus Pridoli. "The Working Group of the Regional Stratigraphic Chart of Northwest China (1976) identified Mutationella cf. podolica and Eospirifer tingi at one locality, and Cyrtina cf. praecedens, Camarotoechia, and Cyclospira at another locality. We are uncertain as to the reliability of these determinations, which would suggest a Lower Devonian rather than an Upper Silurian age."

• formation-level stratigraphic resolution

Environment/lithology: marine; siltstone and marl

Primary reference: E.-z. Mu, A. J. Boucot, X. Chen and J.-y. Rong. 1986. Correlation of the Silurian rocks of China. In A. J. Boucot and W. B. N. Berry (eds.), Geological Society of America Special Paper 202:1-80 [M. Foote/M. Foote/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 27757: authorized by Michael Foote, entered by Michael Foote on 08.01.2003

Creative Commons license: CC0 (CC0)