【摘要】 本文根据温州北部地区的火山—沉积岩地层的剖面,进行了岩石地层、生物地层、年代地层的综合研究和区域对比,针对以往1∶25万、1∶20万和1∶5万区域地质调查的划分和归属提出了新的看法。浙东南下白垩统火山—沉积岩分为上、下两个岩系,下岩系称磨石山群,上岩系称永康群。研究认为,温州北部地区的火山—沉积岩系主体为下白垩统下岩系的磨石山群,并非均为上岩系的永康群馆头组;在永嘉枫林、澄田一带的火山—沉积岩地层分别属于磨石山群大爽组和茶湾组,而桥下一带的沉积岩地层则属于永康群馆头组。更多还原

【Abstract】 According to the volcano-sedimentary stratigraphic sections in the north Wenzhou area,Zhejiang Province,this paper comprehensively studied lithostratigraphy,biostratigraphy,chronostratigraphy and regional stratigraphic correlation of the Lower Cretaceous of the area,and put forward a new opinion aimed at the division and attribution of the volcano-sedimentary strata in the previous 1∶250000,1∶200000 and 1∶50000 scale regional geological surveys.The Lower Cretaceous volcano-sedimentary rocks in southeast Zhejiang Province are divided into two rock series,the lower rock series is called Moshishan Group,the upper rock series is called Yongkang Group.The result of the study indicates that the volcano-sedimentary rocks in the north Wenzhou area are composed mainly of the lower rock series Moshishan Group of the Lower Cretaceous,but not Guantou Formation of the upper rocks series;the volcano-sedimentary strata distributed in Fenglin area and Chengtian area,Yongjia County,should belong in Dashuang Formation and Chawan Formation of Moshishan Group,those distributed in Qiaoxia area,Yongjia County,should belong in Guantou Formation of Yangkang Group.更多还原