一、层序的划分 用地震方法去划分的沉积层序就叫做地震层序(简称层序)。一个完整的层序代表了一个独立的地层单元。它是由相对整一的、连续的、成因上有联系的地层组成,其顶底界线以不整合或可以与之对比的整合界面为界。 陆梁—乌伦古地区的P_t~1—T_t~1、T_t~1—J_t~1两个层序,在地震剖面上反射特征明 First, the division of the sequence Seismic method to divide the sedimentary sequence is called seismic sequence (referred to as sequence). A complete sequence represents an independent stratigraphic unit. It consists of relatively monolithic, continuous and genetically connected strata whose boundaries are bounded by unconformities or contrasting interfaces. Two series of P_t ~ 1_T_t ~ 1 and T_t ~ 1-J_t ~ 1 in Ulungur area, with characteristic reflection on the seismic profile