Palaeogeography and palaeoecology of the Ediacaran(Sinian) macrofossil biota in South China
Tang Feng1,2, Gao Linzhi1,2, Wang Ziqiang3,
1 Institute of Geology， Chinese Academy of Geological Sciences， Beijing 100037 2 Key Laboratory of Stratigraphy and Paleontology，Chinese Academy of Geological Sciences，Beijing 100037 3 School of Earth Sciences and Resources， China University of Geosciences(Beijing)， Beijing 100083
Abstract Ediacaran(635-542Ma)is the important geological period between the last global glaciation(Marinoan)and the Cambrian “explosion of life”. As a result of the tremendous changes of Neoproterozoic climate and environment， rapid evolution and diversity of many eukaryotic lives， including multicellular organisms arise to adapt significant radiation. The Sinian Doushantuo and Dengying Formations in South China and their coeval strata represent the deposition of this special geological time. The complete stratigraphic record，diverse depositional environments and abundant micro- and macrofossils make South China to be one of the ideal areas for further studies on the Ediacaran(Sinian)stratigraphic division and global correlation， and to explore the early origin and radiation of multicellular organisms of the areas of radiation. In particular， the more abundant macrofossils occurring in the Ediacaran(Sinian)strata in the Yangtze platform marginal facies， contain the more distinct assemblages with significant diversity. The recent researches indicate that the Sinian macrofossil assemblages in South China also include a couple of typical fossils of the Ediacaran Biota in Australia and the White Sea biota in Russian. We synthesize in this paper the previous researches in recent years on the Sinian lithofacies and Palaeogeography in South China; mainly displays some newly collections of the “Wenghui Biota” from Jiangkou， Guizhou and the “Jiangchuan Biota” from Jiangchuan， Yunnan; briefly describe the palaeogeographic locations and several Sinian macrofossil assemblages including “Miaohe Biota”. And hereby we conclude that a variety of Sinian macrofossil assemblages in South China were living and buried in the transitional/slope zone of carbonate rocks and clastic rocks at the margin of the Yangtze platform， the characteristics of each macrofossil assemblage were constrained by its sedimentary microfacies and went on changes regularly. The macrofossil records suggest that in this period， accompanied by significant climatic and environmental changes， a series of important evolution events took place， many macroalgae and metazoan generally appeared a diverse developments and laid an ecological foundation for the huge Cambrian radiation of early animal; and in the southern China， a brand new neritic ecosystem had been formed， the dominant planktonic and benthic eukaryotic algae were very prosperous to be the marine primary producers， especially the abundant multicellular macroscopic algae might be main plants of hydrocarbon generation in the transitional period of Precambrian-Cambrian.
About author: Tang Feng， born in 1965， graduated from Department of Earth Sciences， Nanjing University in 1987， obtained his Ph.D.degree from Chinese Academy of Geological Sciences in 1997. Now he is a professor researcher at the Institute of Geology， Chinese Academy of Geological Sciences， and is engaged in palaeontology and stratigraphy. E-mail: tangf65@263.net， tangfeng@cags.ac.cn.
Cite this article:
Tang Feng,Gao Linzhi,Wang Ziqiang. Palaeogeography and palaeoecology of the Ediacaran(Sinian) macrofossil biota in South China[J]. JOURNAL OF PALAEOGEOGRAPHY, 2009, 11(5): 524-533.
Tang Feng,Gao Linzhi,Wang Ziqiang. Palaeogeography and palaeoecology of the Ediacaran(Sinian) macrofossil biota in South China[J]. JOPC, 2009, 11(5): 524-533.
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