Nanjiang Fm (turriculatus Zone) at Qiaoting near Nanjiang, N Sichuan Province (Silurian of China)

Where: Sichuan, China (33.0° N, 107.0° E)

• Paleocoordinates: 0.2° N, 74.1° E (Wright 2013)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Spirograptus turriculatus zone, Nanjiang 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 Nanjiang Fm. directly overlies the Wufeng Shale, which indicates the presence of an important disconformity that omits much of the Lower Silurian."

• formation-level stratigraphic resolution

Environment/lithology: marine; black shale and gray shale

• Correlation chart indicates ba5 based graptolites.
• "consists of black shale in the lower part, gray-greenish and gray-yellowish shale in the upper part, with thin-bedded sandstone at the top...total thickness 446.6m"

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 27798: authorized by Michael Foote, entered by Michael Foote on 09.01.2003

Creative Commons license: CC0 (CC0)

Taxonomic list

Pterobranchia
 Graptoloidea - Cryptograptidae
 Graptoloidea - Climacograptidae
Climacograptus sp. Hall 1865 climacograptid
 Graptoloidea - Monograptidae
Monograptus spp. graptolite
4 species (names not reported)
Pristiograptus spp. graptolite
2 species (names not reported)
Oktavites spp. Levina 1928 graptolite
3 species (names not reported)
Pernerograptus sp. Přibyl 1941 graptolite
Rastrites spp. graptolite
2 species (names not reported)
Streptograptus spp. graptolite
6 species (names not reported)
Spirograptus spp. Guerich 1908 graptolite
2 species (names not reported)
 Graptoloidea - Retiolitidae
Retiolites sp. graptolite
Pseudoretiolites spp. Bouček and Münch 1944 graptolite
2 species (names not reported)
Pseudoplegmatograptus spp. graptolite
2 species (names not reported)
Glyptograptus spp. Lapworth 1873 graptolite
4 species (names not reported)
Petalolithus spp. Suess 1851 graptolite
9 species (names not reported)