二迭纪 meaning in English

permia eriod
permian period

Terrestrial sediments can be found in shengli oil filed beginning from permian to tertiary . in addition , source beds are widely distributed
胜利油区从古生代二迭纪到新生代第三纪每个地质时期都有陆相沉积，也广泛地发育着生油层。
In the area of the left bank , rock body is mainly composed of permian period - triassic period granite and triassic period siltstones and mudstones ( t2m ) . moreover , the rock body has been more faulted , such as f1 f3 f9 and so on . in addition , there also exist a lot of joints and form complex rock mass structure
工程区主要出露二迭纪三迭纪花岗岩体( _ 4 ~ 3 _ 5 ~ 1 )和三迭系中统忙怀组下段沉积岩( t _ ( 2m ) ~ 1 ) ，发育有工程区规模最大的f _ 1和f _ 3断层，以及其它断层和大量的各类断续延伸的裂隙，岩体结构较为复杂。