Mid Upper Kaochaitien Fm, Luoshuichong, Mairang, Wudang, Guiyang, Guizhou Prv. (Silurian to of China)

Where: Guizhou, China (26.6° N, 106.8° E: paleocoordinates 8.7° N, 126.5° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Upper Kaochaitien Formation, Telychian to Telychian (438.5 - 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; shale and marl

• Correlation chart shows shelly-based BA3.
• "The middle part is shale interbedded with marl and argillaceous limestone, and a few gbeds of fine-grained sandstone. the middle part is rich in fossils, chiefly brachiopods and corals, with trilobites and nautiloids less abundant"

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 27786: authorized by Michael Foote, entered by Michael Foote on 09.01.2003, edited by Austin Hendy

Creative Commons license: CC BY (attribution)

Taxonomic list

Anthozoa
 Stauriida - Pycnostylidae
 Stauriida - Ketophyllidae
Dentilasma sp. Ivanovskiy 1962 horn coral
 Rugosa - Chonophyllidae
 Favositida - Multisoleniidae
 Favositida - Favositidae
Favosites forbesi tabulate coral
Favosites orientalis tabulate coral
Favosites longliensis tabulate coral
Favosites exilis Sokolov 1952 tabulate coral
Favosites gothlandicus Lamarck 1816 tabulate coral
 Favositida - Alveolitidae
Subalveolites sp. Sokolov 1955 tabulate coral
Cephalopoda
 Orthocerida - Sichuanoceratidae
Bivalvia
  -
Bivalvia indet. Linnaeus 1758 clam
 Cyrtodontida - Cyrtodontidae
Cyrtodonta sp. Billings 1858 clam
 Nuculanida - Malletiidae
Dysodonta sp. Mansuy 1913 clam
Strophomenata
 Orthotetida - Chilidiopsidae
Valdaria sp. Bassett and Cocks 1974
 Strophomenida - Leptostrophiidae
Brachyprion sp. Shaler 1865
Rhynchonellata
 Atrypida - Atrypinidae
 Spiriferida - Cyrtiidae
Eospirifer sp. Schuchert 1913
 Spiriferida - Delthyrididae
Howellella sp. Kozlowski 1946
 Athyridida - Nucleospiridae
Trilobita
 Proetida - Proetidae
Chuanqianoproetus sp. Wu 1977 trilobite
 Phacopida - Encrinuridae
Encrinuroides sp. Reed 1931 trilobite