Where: Yunnan, China (25.5° N, 103.8° E: paleocoordinates 9.1° N, 129.9° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Miaokao Formation, Ludlow (427.4 - 423.0 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. "Spathognathodus crispus occurs in the lower part of the Miaokao Fm. Therefore, we correlate the M. Fm. with the Late Ludlow." It's not clear from the correlation chart whether this is Ludfordian in the strict sense.

• formation-level stratigraphic resolution

Environment/lithology: marine; limestone and flat-pebble shale

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 27796: authorized by Michael Foote, entered by Michael Foote on 09.01.2003, edited by Joseph Flannery-Sutherland

Creative Commons license: CC BY (attribution)