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_________________________________________________________________________________________________________ Kölner Forum Geol. Paläont., 19 (2011) M. ARETZ, S. DELCULÉE, J. DENAYER & E. POTY (Eds.) Abstracts, 11th Symposium on Fossil Cnidaria and Sponges, Liège, August 19-29, 2011 _________________________________________________________________________________________________________ 96 Late Visean to Early Serpukhovian Rugose corals from Yashui, Guizhou, South China Wei LIN 1 , Xiangdong WANG 1 , Edouard POTY 2 & Markus ARETZ 3 1 Nanjing Institute of Geology and Palaeontology, China Academy of Science, No. 39 East Beijing Road, Nanjing, P. R. China; robert_lynnxx@hotmail.com; xdwang@nigpas.ac.cn 2 Service de Paléontologie animale, Université de Liège, Bâtiment B18, Allée du 6 août, Sart Tilman, B-4000 Liège, Belgium; e.poty@ulg.ac.be 3 Université de Toulouse (UPS), GET (OMP), 14 Avenue Edouard Belin, F-31400 Toulouse, France; markus.aretz@get.obs-mip.fr The use of rugose corals for biostratigraphic correlation is always underestimated due to the difficulties in identification and overemphasis on facies control on coral distributions. Especially in such strata as the Late Visean-Serpukhovian, the frequent appearance of sedimentary disruptions brought further trouble in rugose coral biostratigraphic studies. Thus, the problem of using rugose corals to recognize the base of Serpukovian still remains unsolved. The Yashui section in the Guizhou Province, South China contains a late Visean-Serpukhovian shallow water sedimentary succession mainly composed of light coloured bioclastic limestone, which is rich in rugose corals and foraminifers. The section was recently dated by foraminifers (WU et al. 2009). Rugose corals have been collected from 90m of strata. The fauna is diversified and 23 species have been identified (including four in open nomenclature). They belong to 14 genera. All are shallow water inhabitates and can be included in four families: Aulophyllidae, Palaeosmiliidae, Lithostrotionidae and Axophyllidae. Lithostrotionidae and Aulophyllidae are the most diversified in the section. The ranges of coral species are shown in Fig. 1. Most of the corals occuring in the sampling interval indicate the Yuanophyllum zone as proposed by YÜ (1931), which was further divided into three subzones by WU (1964). A correlation to the European coral zonations can be attempted based on species such as Dibunophyllum bipartitum konicki and Siphonodendron irregulare, which are also common faunal elements in the Visean and Early Serpukhovian of Europe. Aulina rotiformis is a typical species for strata of Visean/Serpukhovian transition. This species occurs at Yashui about 20 m below the Viséan/Serpukhovian boundary based on foraminifers. WU X., JIN X., WANG Y., WANG W. & QI Y. (2009): The foraminiferal assemblage in the Visean/Serpukhovian boundary interval at the Yashui section, Guizhou, South China. - Newsletters on Carboniferous Stratigraphy, 27: 28-33. YÜ C. (1931): The correlation of the Fengning system, the Chinese Lower Carboniferous, as based on coral zones. - Bulletin of the Geological Society of China, 10: 1-30. WU W. (1964): Lower Carboniferous corals in Central Hunan. - Memoirs of the Institute of Geology and Palaeongology, 3: 1-100 (In Chinese with an English abstract).
_________________________________________________________________________________________________________ Kölner Forum Geol. Paläont., 19 (2011) M. ARETZ, S. DELCULÉE, J. DENAYER & E. POTY (Eds.) Abstracts, 11th Symposium on Fossil Cnidaria and Sponges, Liège, August 19-29, 2011 _________________________________________________________________________________________________________ Fig. 1: The ranges of the rugose coral species from Yashui section. The approximate Visean/Serpukhovian boundary is according to the Foraminifers study of WU et al. (2009). 97
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ISSN 1437-3246 ISBN 978-3-934027-22
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