众所周知,用来确定地层层序的构造可以分为两类。一是原始沉积构造,这是指由沉积作用形成的各种沉积构造现象,常见的有韵律层理,流水层理、波痕、泥裂以及冲刷痕迹等等。另一是岩石在地应力作用下形成的构造形迹,这类构造又叫做次生构造,包括褶皱形成时的层间滑动以及由这种滑动 As we all know, the structure used to determine the sequence of stratigraphy can be divided into two categories. First, the original sedimentary structure, which refers to the sedimentary formation by a variety of sedimentary structures, the common rhythm layer, flow stratification, ripples, mud cracks and scour marks and so on. The other is the tectonic trace of rocks formed under the action of geostress. Such structures are also called secondary structures, which include interlaminar sliding in the formation of folds,