摘要
详细描述了米仓山南缘奥陶系剖面。将该区奥陶系划分为湄潭组、宝塔组和龙马溪组三个岩石地层单位，并探讨了其空间变化规律，同时根据生物组合特征建立了四个生物带，发现了Ｈｉｒｎａｎｔｉａ－Ｋｉｎｎｅｌａ组合带的存在。拟定后的龙马溪组为一跨晚奥陶世－早志留世的岩石地层单位。
The Ordovician stratigraphic section in the southern Micang Mountain is described in detail in this paper. The Ordovician is divided into three lithostratigraphic units, i.e. the Meitai Fm., the Baota Fm. and the Longmaxi Fm.. Their lateral variations are discussed. Four fossil assemblage zones are established according to the characteristics of fossil association. Hirnantia Kinnella assemblage zone was discovered for the first time in this area. The defined Longmaxi Fm. in this paper extends from the Late Ordovician to the Early Silurian.
出处
《成都理工学院学报》
CSCD
1999年第1期86-91,共6页
Journal of Chengdu University of Technology
基金
国家计委1:50000遥感区域地质调查项目
关键词
米仓山
奥陶系
地层
生物组合
Micang Mountain
Ordovician
stratigraphy
fossil assemblage
