Where: Anhui, China (34.0° N, 118.0° E: paleocoordinates 23.1° S, 123.1° E)
• coordinate based on nearby landmark
• local area-level geographic resolution
When: Chenxiacun 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. "Qian [1978] subdivided the formation into two parts. Fossils from the lower part include...Cyclonema sp., which suggests a Late Llandoveyr age, and may be correlated with the Lojoping Fm. the fossils from the upper part include...Pristiograptus cangshanensis. The graptolite is similar to Monoclimacis fenggangensis from the Leijiatun Formation of NE Guizhou, which suggests a later Upper Llandovery age. This formation was previously included with the underlying Kaochiapien Fm." Correlation chart suggest correlation with turriculatus zone for lower member and late turriculatus zone through rest of Llandovery for upper member.
• member-level stratigraphic resolution
Environment/lithology: marine; green, yellow, calcareous siltstone 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 27737: authorized by Michael Foote, entered by Michael Foote on 07.01.2003
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Stromatoporoidea | |
Clathrodictyon vesiculosum Nicholson and Murie 1878 stromatoporoid sponge | |
Anthozoa | |
Ceriaster minor horn coral | |
Tryplasma anhuiensis horn coral | |
Acanthohalysites hanshanensis tabulate coral | |
Helioplasmolites minor tabulate coral | |
Mesofavosites sp. Sokolov 1951 tabulate coral
Favosites gothlandicus Lamarck 1816 tabulate coral | |
Cephalopoda | |
Yichangoceras sp. Chen et al. 1981 | |
Gastropoda | |
Cyclonema sp. Hall 1852 snail | |
Rhynchonellata | |
Zygospiraella sp. Nikiforova 1961 | |
Trilobita | |
Scutellum (Thysanopeltella) sp. Pusch 1833 trilobite | |
Crinoidea | |
Petalocrinus chenxiacunensis Sea lily |