HIGH-RESOLUTION LITHOSTRATIGRAPHY OF THE CHANGHSINGIAN STAGE IN MEISHAN SECTION D,ZHEJIANG
CAO Chang-qun and ZHENG Quan-fengState Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, CAS, Nanjing, 210008
High-resolution lithostratigraphy has been attempted here to provide a detailed stratigraphic sequence of the Changhsingian Stage and the Lower Triassic in Meishan Section D. Previous stratigraphic data from Yin et al. (1996), Sheng et al. (1987) and Zhao et al. (1981) were compiled and revised with numerous errors in stratigraphic descriptions and thickness measurements corrected. Most importantly, the stratigraphic positions of the ash-beds and carbonatized tuff beds have been precisely measured. New microstratigraphic observation suggests that the Permian-Triassic transitional sequence at Meishan is a rather condensed or discontinuous at the uppermost part of Bed 24e and within Bed 27. Together with precise biostratigraphic data high-resolution lithostratigraphy will help us to improve our knowledge about the Permian-Triassic transition and the Permian-Triassic GSSP.