- The areas of transgression are indicated by wide spacing of the thickness contours.
稀疏的等厚线代表海侵区。
- Inland foraminifer fossils are considered as one of good indicators of marine facies.
内陆有孔虫化石群被一些学者视为是海侵或残留海的指相化石。
- The concepts of marine transgression and regression are considered to be fundamental.
海进和海退概念被认为是基本的概念。