永吉 meaning in English

eikichi
nagayoshi
yongji

These strata of basin are made up of cretaceous period , tertiary period and quaternary period . tertiary period is the major sediment in the basin and the biggest thickness is up to five thousand meters . this thesis studies the petrology and characteristic of the diagenetic process of the reservoir
盆地的沉积岩系主要由白垩系、上下第三系和第四系组成，下第三系是盆地中的主体沉积，最大厚度5000米，分为万昌组、永吉组、奢岭组、双阳组。