下第三系的构造变形主要表现为区内下第三系红层的逆冲断块和宽缓褶皱变形。
The structural deformation of the Paleogene is characterized evidently by thrust block and broad folds.
东濮凹陷是渤海湾地区一个典型的盐湖盆地，其下第三系的两个沉积旋回沉积了两套盐岩。
Dongpu depression, in which the halites were deposited in two depositional cycles, is a typical salty lacus in Bohaiwan basin.
在牛庄凹陷下第三系生油岩地层中，由于三角洲沉积作用，形成了较多的砂岩透镜体油藏。
Many oil pools in the sandstone lenses are formed in the Eogene oil source beds in the Niuzhuang Depression as a result of deltaic deposition.
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