Conodont biostratigraphy of the Yujiang Formation (Emsian,Lower Devonian) at Shizhou,Guangxi, South China |
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| Authors: | Jian-Feng Lu José Ignacio Valenzuela-Ríos Jau-Chyn Liao Guo-Dun Kuang |
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| Affiliation: | 1. State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 39 East Beijing Road, Nanjing 210008, PR China;2. Department of Botany and Geology, University of Valencia, 50 c/Dr. Moliner, Burjassot E-46100, Spain;3. Guangxi Bureau of Geology and Mineral Resources, 1 Jiangzheng Road, Nanning 530023, PR China |
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| Abstract: | We study conodonts from the upper part of the Shizhou Member of the Yujiang Formation in Liujing area for the first time. Relatively abundant conodonts were collected from six sampling levels located between the uppermost part of the Shizhou Member to the lowermost part of the Daliancun Member at the Shizhou section, Liujing, Guangxi. The material includes Polygnathus excavatus excavatus Carls and Gandl, P. excavatus ssp. 114 Carls and Valenzuela-Ríos, P. nothoperbonus Mawson, P. perbonus (Philip) as well as ?Ozarkodina? midundenta (Wang and Ziegler) and ?O.? prolata Mawson. The lowest record of P. nothoperbonus is documented 0.35 m below the boundary between the Shizhou and Daliancun members. Correlation of conodont biostratigraphy between the Shizhou and Liujing sections indicates that the upper part of the Shizhou Member (partially) belongs to the excavatus Zone and the Daliancun Member belongs to the nothoperbonus Zone. |
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| Keywords: | Conodonts Emsian Shizhou Member Daliancun Member Yujiang Formation |
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