Also known as Type section of Xiushan Formation (Upper Member)

Where: Sichuan, China (28.6° N, 108.9° E: paleocoordinates 6.3° N, 126.7° E)

• coordinate based on political unit

• basin-level geographic resolution

When: Upper Member (Xiushan Formation), Telychian (438.5 - 433.4 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 age of the Xiushan Formation is still an open question...On the chart we place the lower member in the latest Llandovery and the upper member in the latest Llandovery to early Wenlock." (Formation overlies Rongxi Fm., which is regarded as Telychian.) More recent data puts in in Telychian only, as the overlying Huixingshao is considered Telychian (PJW 2018-04-22).

• member-level stratigraphic resolution

Environment/lithology: marine; shale and mudstone

Size classes: macrofossils, mesofossils

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 27908: authorized by Michael Foote, entered by Michael Foote on 16.01.2003

Creative Commons license: CC BY (attribution)