Where: Guizhou, China (26.6° N, 106.8° E: paleocoordinates 8.0° N, 127.0° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Upper Kaochaitien Formation, Sheinwoodian (433.4 - 430.5 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. Upper K. Fm. divided into three parts, and as a whole spans the Late Llandovery to Early Wenlock, according to correlation chart. "The fossils from the middle part correlate with those of the Xiushan Formation. Therefore, the lower part of this formation is correlated with the Rongxi Formation [which is herein regarded as middle Late Llandovery], and the upper part is missing in many areas, but may be correlated with the Huixingshao Formation red beds [which are thought herein to be Wenlock, although with some uncertainty]. These formations are close to the Llandovery-Wenlock boundary, but the fossils do not permit precise zonation." This discussion suggests that a lower part is Late Llandovery, middle part is Llandovery to Wenlock, and upper part is Wenlock.

• member-level stratigraphic resolution

Environment/lithology: marine; gray, green shale and sandstone

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 27787: authorized by Michael Foote, entered by Michael Foote on 09.01.2003

Creative Commons license: CC BY (attribution)