... Pleistocene stratum 更新统地层 mesozoic stratum 中生代层 ; 中生代地层 ; 中生界地层 archean stratum 太古代层 ...
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mesozoic marine stratum 中生代海相地层
It is important for us to find new targets of the exploration of oil-gas in Ordos Basin, with the oilfield development in Mesozoic stratum for a long time.
鄂尔多斯盆地中生界油气勘探开发历史较长，目前主要面临着寻找新的有利勘探区块和层位的任务。
The rivers running across large area with emergence of Mesozoic and tertiary stratum usually have high sediment concentration and large modulus of erosion.
穿过有大面积中生界和第三系地层出露地区的河流，其含沙量高，侵蚀模数大。
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