Shiwuzi Formation at Shiwuzi, Dazhongba, Yichang, W Hubei Province (Silurian of China)

Where: Hubei, China (30.7° N, 111.3° E: paleocoordinates 3.3° N, 127.2° E)

• coordinate based on political unit

• local area-level geographic resolution

When: Shiwuzi 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. Shiwuzi formation used by authors to refer to what has been the lower (or lower and middle) part of the Shamao formation. Late Llandovery age based on graptolites; correlation chart shows Telychian age.

• formation-level stratigraphic resolution

Environment/lithology: marine; green, yellow shale and siltstone

• "composed of yellowish-green shale, siltstone, and fine-grained sandstone 452 m thick...characterized by a mixed graptolitic and shelly fauna"

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 27841: authorized by Michael Foote, entered by Michael Foote on 14.01.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

 Graptoloidea - Monograptidae
Oktavites sp. Levina 1928 graptolite
Monograptus sp. graptolite
 Graptoloidea - Retiolitidae
 Dendroidea - Dendrograptidae
Ptilograptus sp. graptolite
 Orthida - Dalmanellidae
Isorthis sp. Kozlowski 1929
 Athyridida - Nucleospiridae
 Atrypida -
? Zygospiraella sp. Nikiforova 1961
 Strophomenida - Furcitellidae
 Proetida - Proetidae
Latiproetus sp. Lu 1962 trilobite
 Phacopida - Encrinuridae
Encrinuroides sp. Reed 1931 trilobite
 Corynexochida - Styginidae
Scutellum sp. Pusch 1833 trilobite
 Odontopleurida - Odontopleuridae
Gaotania sp. Chang 1974 trilobite