Stratum is an important idea of three dimension strata model. It plays a key action in instauration of three dimension strata model. How to describe strata based on lithology is very important. In this paper
according to the range of rock formation interface in geological drill hole sampling
the ordering of strata is ascertained. In the light of multi-DEM set-up model idea
pursuant to lithology
the intersection division for multi-DEM proceeded. Three dimension strata model was formed in terms of lithology.