Episodes 2012; 35(4): 462-477
Published online December 1, 2012
Copyright © International Union of Geological Sciences.
Shanchi Peng1, 2, Loren E. Babcock3, Jingxun Zuo1, 4, Xuejian Zhu1, Huanling Lin1, Xianfeng Yang5, Yuping Qi1, Gabriella Bagnoli6, Longwu Wang7
1Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 39 East Beijing Road, Nanjing 210008, China. E-mail: firstname.lastname@example.org; email@example.com; firstname.lastname@example.org
2State Key Laboratory of Palaeobiology and Stratigraphy, Chinese Academy of Sciences, 39 East Beijing Road, Nanjing 210008, China
3School of Earth Sciences, The Ohio State University, 125 South Oval Mall, Columbus, Ohio 43210, USA, and Department of Geology, Lund University, Sölvegatan 12, SE 223 62 Lund, Sweden. E-mail: email@example.com
4Henan Institute of Geological Survey, Zhengzhou 450007, China, firstname.lastname@example.org
5Yunnan Province Key Lab in Palaeontology, Yunnan University, Kunming 650091, China. E-mail: email@example.com
6Department of Earth Sciences, Pisa University, 56126 Pisa, Italy. E-mail: firstname.lastname@example.org
7Geological Surveying Institution of Zhejiang Province, Xiaoshan, 311203, China. E-mail: email@example.com
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The International Commission on Stratigraphy and the IUGS Executive Committee have recently approved a Global Standard Stratotype-section and Point (GSSP) defining the base of the second stage of the Furongian Series, Cambrian System. This stage is named the Jiangshanian Stage, after Jiangshan City, western Zhejiang Province, China, where the GSSP is located. The GSSP is exposed in a natural outcrop near Duibian Village. It is defined at the base of a limestone (wackestone) layer 108.12 m above the base of the Huayansi Formation in the Duibian B section, coinciding with the first appearance of the cosmopolitan agnostoid trilobite Agnostotes orientalis (base of the A. orientalis Zone). The GSSP is at a position of 28± 48.977’N latitude and 118± 36.887’E longitude. Secondary global markers at or near the base of the stage include the first appearance of the cosmopolitan polymerid trilobite Irvingella angustilimbata, which coincides with the FAD of the primary marker in the stratotype section, and near the end of a large positive carbon isotopic excursion (SPICE excursion). Faunal turnovers close to the base of the Jiangshanian Stage have been recognized as being at the base of the Iverian Stage in Australia, the Gonggrian Stage in Korea, and the Agnostotes orientalis– Irvingella perfecta Zone in Siberia, and near the base of the Aksayan Stage in Kazakhstan, the Sunwaptan Stage in Laurentia, and the Parabolina brevispina Zone in Baltica.