Stratigraphy and typology are tow basic methods in archaeology .
地层学与形制学是考古学的两种基本方法。
Research of the stratigraphy and the petrology suggest the fact .
地层学和岩石学的研究证明了这一点。
The earth 's official calendar is kept by the international commission on stratigraphy ( ics ) the world 's principal authority on stratigraphy the study of earth 's history through the analysis of rock layers and layering .
Meanwhile ; the development of paleomagnetism has rendered magnetic stratigraphy very important in determining ages of paleorelict and fossils of ancient mankind .
同时,古地磁学的发展使磁性地层学成为确定古遗存、古人类化石时代的重要手段。
Accommodation space is the key conception in sequence stratigraphy and base-level is also important , so they are very significant to illustrate the mechanism of the formation of sequence .
