First palynological data from the Jurassic South Xiangshan Formation (Nanjing area,China) |
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| Affiliation: | 1. State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences (Wuhan), Wuhan 430074, PR China;2. GeoZentrum Nordbayern, Universität Erlangen-Nürnberg, Schlossgarten 5, 91054 Erlangen, Germany;3. State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Nanjing 210008, PR China;4. School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK;1. State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, No. 39 East Beijing Road, Nanjing 210008, China;2. University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Beijing 100049, China;3. West Bohemia Museum in Pilsen, Centre of Palaeobiodiversity, Kopeckého sady 2, Plzeň 30100, Czech Republic;4. Geological Sciences, Stanford University, Stanford, CA 94305, USA;5. State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Xiangshan, Beijing 100093, China;1. Korea Polar Research Institute, 26 Songdomirae-ro, Yeonsu-gu, Incheon 406-860, Republic of Korea;2. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Am Alten Hafen 26, 27568 Bremerhaven, Germany |
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| Abstract: | The outcrops of the Xiangshan Group have been studied since the beginning of the twentieth century, yielding a rich macroflora (the Xiangshan Flora), mainly from the lower part of the Xiangshan Group (South Xiangshan Formation). Nevertheless, no palynological data have been published so far from the South Xiangshan Formation. The present study provides the first palynostratigraphic data of the South Xiangshan Formation. More than 50 fossil taxa from 30 fossil genera have been identified, allowing for a more accurate dating. The most characteristic taxa are Polycingulatisporites triangularis, Quadraeculina anellaeformis, Manumia delcourtii, Ischyosporites variegatus, Callialasporites turbatus, C. trilobatus, C. minus, and Sestrosporites pseudoalveolatus, suggesting a late Toarcian-late Aalenian age for the South Xiangshan Formation. These results are consistent with previous studies suggesting a middle-late Early Jurassic age for this formation; consequently, the most probable age for the South Xiangshan Formation is late Toarcian (late Early Jurassic). |
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| Keywords: | Xiangshan Flora Xiangshan Group South Xiangshan Formation Toarcian Early Jurassic Palynostratigraphy Asia |
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