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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 .

地球的官方日历由国际地层委员会（ics）保管，ics是世界地层学最重要的权威机构，他们通过对岩层和分层的分析研究地球的历史。

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 .

可容空间是层序地层学关键概念，基准面也是层序地层学很重要的概念，两者对于解释层序形成机制是非常重要的。