四川广安谢家槽海相早、中三叠世地层划分  

STRATIGRAPHIC DIVISION OF THE EARLY AND MIDDLE TRIASSIC AT THE XIEJIACAO SECTION IN GUANG'AN,SICHUAN

作　　者：祝幼华[1] 罗辉[1] 蔡华伟[1] 许波[1] 杨昊[1] 赵媛媛[1] 陈迪舒[1] 周志澄[1] 陈金华[1] 

机构地区：[1]中国科学院南京地质古生物研究所,江苏南京210008

出　　处：《地层学杂志》2012年第4期784-791,共8页Journal of Stratigraphy

基　　金：中国科学院知识创新工程重要方向项目资助(KZCX2-YW-154)

摘　　要：四川广安谢家槽剖面海相中、下三叠统发育齐全、地层出露良好,化石丰富,是研究上扬子地区海相中、下三叠统的理想剖面之一。据岩性特征,参照四川省岩石地层清理方案,将该剖面划分为下三叠统夜郎组及嘉陵江组、中三叠统雷口坡组。结合有孔虫化石组合特征,探讨了各组地层的时代归属。The Xiejiacao section in Guang＇an of Sichuan Province, with a continuous sequence of fossiliferous and well exposed Lower and Middle Triassic marine strata, is an ideal section to study marine Triassic stratigraphy in the Upper Yangtze area. On the basis of lithostratigraphic data the Lower Triassic at this section is divided into the Yelang and Jialingjiang formations, and the Middle Triassic consists of the Leikoupo Formation. The age of Yelang, Jialingjiang, and Leikoupo formations are discussed in this paper based on foraminiferal assemblages.

关 键 词：生物地层 岩石地层 地层划分 有孔虫 三叠纪 广安 四川 

分 类 号：P534.51[天文地球—古生物学与地层学]