摘要
描述了四川彭县海窝子乡须家河组第四段实测剖面的地层层序、岩性、化石及厚度等。根据在此段地层中采到的植物化石,确定其时代应为早侏罗世。又因其岩石特征明显,建议将此段地层命名为海窝子组。论文还探讨了印支运动在该区的幕次划分及其影响。
First of all, this paper describes the stratigraphic sequence, lithological characteristics,thickness and fossil assemblages of the fourth member of Xujiahe Formation in Haiwozi, Pengxian. Secondly, the paper discusses the chronologic age of the fourth member of Xujiahe Formation,based on the flora collected from that member, which was determined as early Jurassic and a new for-mation (Haiwozi Formation) is established. Finally, the tectonic phase is reconstructed and the effect of Indosinian orogeny is assessed in thisarea.
关键词
须家河组
第四段
造山运动
构造幕
late Triassic
early Jurassic
Xujiahe Formation
Indosinian orogeny
tectonic phase
Longmenshan Mountain
