caa a22 4500 445299371 CHVBK 20180317142552.0 cr unu---uuuuu 170323e20100101xx s 000 0 eng 10.1007/s11430-010-0005-3 doi (NATIONALLICENCE)springer-10.1007/s11430-010-0005-3 Expansion of the Cathaysian Oldland through the Ordovician-Silurian transition: Emerging evidence and possible dynamics [Elektronische Daten] [JiaYu Rong, RenBin Zhan, HongGen Xu, Bing Huang, GuoHua Yu] Located northwest of the Jiangshan-Shaoxing Fault Zone, western and northwestern Zhejiang and northeastern Jiangxi provinces experienced major changes in bio- and litho-facies and paleogeography through the Ordovician-Silurian transition (late Katian, Hirnantian, and early Rhuddanian), as manifested by stratigraphic, paleontologic and synecologic records. Three geographic units under consideration are South, Central, and North areas. The western margin of the South area was occupied by the Huaiyu Mountains, whereas the other two parts were covered by the Zhe-Gan Sea during late Katian (Late Ordovician) time. In the early stage of the Changwu Formation deposition (late Katian), the sea was deepening northeastward, but with shallower conditions in the southwest and deeper conditions in the northeast. During mid to late stages of Changwu Formation deposition (latest Katian), the sea became much shallower and the sea bottom was uplifted substantially, which occurred somewhat prior to the global trend. During the Hirnantian (latest Ordovician) and early Rhuddanian (earliest Silurian), the study region became a shallow bay under expansion of the Cathaysian Oldland. There occurred a major drop of sea level and great changes in benthic biota with the occurrence of many new immigrants through the Ordovician-Silurian transition, which are closely related to a unique regional orogeny. The Yangtze and Cathaysian blocks may have amalgamated within the South China Paleoplate during this interval to cause the continuous uplifting and northwestward expansion of the Cathaysian Oldland. Science in China Press and Springer Berlin Heidelberg, 2010 Cathaysian Oldland nationallicence Jiang-Shao Fault Zone nationallicence Ordovician-Silurian transition nationallicence biostratigraphy nationallicence synecology nationallicence paleogeography nationallicence Rong JiaYu State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 210008, Nanjing, China aut Zhan RenBin State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 210008, Nanjing, China aut Xu HongGen Zhejiang Institute of Geological Survey, 311203, Hangzhou, China aut Huang Bing State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 210008, Nanjing, China aut Yu GuoHua Zhejiang Institute of Geological Survey, 311203, Hangzhou, China aut Science in China Series D: Earth Sciences SP Science in China Press 53/1(2010-01-01), 1-17 1674-7313 53:1<1 2010 53 11430 https://doi.org/10.1007/s11430-010-0005-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11430-010-0005-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rong JiaYu State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 210008, Nanjing, China aut NATIONALLICENCE 700 1- Zhan RenBin State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 210008, Nanjing, China aut NATIONALLICENCE 700 1- Xu HongGen Zhejiang Institute of Geological Survey, 311203, Hangzhou, China aut NATIONALLICENCE 700 1- Huang Bing State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 210008, Nanjing, China aut NATIONALLICENCE 700 1- Yu GuoHua Zhejiang Institute of Geological Survey, 311203, Hangzhou, China aut NATIONALLICENCE 773 0- Science in China Series D: Earth Sciences SP Science in China Press 53/1(2010-01-01), 1-17 1674-7313 53:1<1 2010 53 11430 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer