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1·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。

2·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。

3·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。

4·Using this method can not only avoid subjective random in the stratigraphic classification in single well, but also can give evidence to field horizon tracing.

应用此方法不仅避免了单井分层主观随意性，又对现场层位追踪起到了一定的指导作用。