Biostratigraphy is one of the basic and widely applied branches in stratigraphy.
生物地层学是地层学中最基本的也是应用最广泛的一个分支学科。
2
This paper gives descriptions to biostratigraphy of Cretaceous sedimentary basins and egg fossils from these basins;
文中还介绍了我国白垩纪几个沉积盆地的生物地层和一些具有特色的蛋化石种类；
3
The succession, division and correlation of these strata are studied with lithostratigraphy, biostratigraphy and isotopic geochronology methods and by the combination of of point, line and area.