A specific position in a stratigraphic column,such as the location of one or more fossils,that serves to identify the stratum with a particular period.层位，地层柱中的一个特定位置，例如，一种或多种化石的地层位置，这些化石的位置可用于确定其所在地层的年代。
The authors discuss the depositional characteristics and sequence stratigraphic significance of late Paleozoic coal-bearing strata of the Datong area, Shanxi.本文论述了山西大同晚古生代含煤地层的沉积特征及其层序地层学意义。
Stratigraphic significance commonly is apparent only where seismic data are tied with well data.通常，只有在地震资料与钻井资料相结合的地方，地层学的意义才是明显的。
