Where: Yunnan, China (25.0° N, 99.0° E: paleocoordinates 1.8° S, 138.5° E)
• coordinate based on nearby landmark
• local area-level geographic resolution
When: Ludlow to Ludlow (427.4 - 419.2 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. "Ni Yu-nan and others (in press) described this unit. When they measured the type section of the Jenhochiao Formation at Hunshuitang...they reported [it]...[The] fauna indicates a Ludlow to Pridoli age." The unit is faulted off at the base. A minimum thickness is about 50 m."
• formation-level stratigraphic resolution
Environment/lithology: marine; gray, green marl and limestone
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 27854: authorized by Michael Foote, entered by Michael Foote on 14.01.2003
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Geisonoceras sp. Hyatt 1884 | |
"Orthoceras" trecentesium, "Michelinoceras (Kopaninoceras) dorsatum" = Kopaninoceras, Michelinoceras (Kopaninoceras) jucundum
"Michelinoceras (Kopaninoceras) dorsatum" = Kopaninoceras
Michelinoceras (Kopaninoceras) jucundum Barrande 1870 | |
Crinoidea | |
"Camarocrinus asiaticus" = Scyphocrinites
"Camarocrinus asiaticus" = Scyphocrinites Sea lily | |
Conodonta | |
"Spathognathodus inclinatus" = Wurmiella excavata, "Neoprioniodus excavatus" = Wurmiella excavata
"Spathognathodus inclinatus" = Wurmiella excavata Branson and Mehl 1933 conodont
"Neoprioniodus excavatus" = Wurmiella excavata Branson and Mehl 1933 conodont corrected from "Neoprioniodes"
| |
Hindeodella equidentata Rhodes 1953 conodont
Ozarkodina media Walliser 1957 conodont | |
Spathognathodus eosteinhornensis conodont
Trichonodella excavatus conodont |