Precise and careful stratigraphic classification is the base of all kinds of work.
正确而又精细的地层划分是各项工作的基础。
There are many sequence stratigraphic classification project of Yanchang formation in Ordos basin.
鄂尔多斯盆地三叠系延长组地层层序划分方案较多。
In the regional stratigraphic classification and correlation, the Lower Tertiary strata are absent in Guyang basin, Inner Mongolia.
在区域地层划分与对比中，内蒙古固阳盆地缺少下第三系。
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