Unnamed Argillaceous Limestone at Hunshuitang near Baoshan, Yunnan Province (Silurian to of China)

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

• Correlation chart shows BA3 position based on shelly fauna.
• "purple, gray-green marl and limestone with a few black shale interbeds"

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
 Dissidocerida - Geisonoceratidae
Geisonoceras sp. Hyatt 1884
 Orthocerida - Dawsonoceratidae
 Orthocerida - Orthoceratidae
"Michelinoceras (Kopaninoceras) dorsatum" = Kopaninoceras
Crinoidea
 Monobathrida - Scyphocrinitidae
"Camarocrinus asiaticus" = Scyphocrinites
"Camarocrinus asiaticus" = Scyphocrinites Sea lily
Conodonta
 Ozarkodinida - Spathognathodontodae
"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"
 Ozarkodinida -
Hindeodella equidentata Rhodes 1953 conodont
Ozarkodina media Walliser 1957 conodont
  -