The Glauconite Sandstone is a persistent stratigraphic unit. 海綠石砂岩是一個穩定的地層單元。
We regard them as actural stratigraphic units produced primarily by magmatic sedimentation. 我們把它們當作實際上的地層單元來考慮，它們主要由岩漿沉積作用所產生。
Finally the stratigraphic ages and correlation of the Ordovician lithostratigraphic units in the study area are discussed. 筆者認為，申扎組應被廢棄，德悟卡下組底界應作修訂，並對該地區奧陶系岩石地層單位進行了簡要的時代討論和對比。
Compared to supersequence boundaries, the depositional hiatus at sequence boundaries is shorter and sequence boundaries are not compatible with lithostratigraphic unit boundaries. 沉積層序界面處沉積間斷的時間相對超層序界面要短，與岩石地層單位界面往往不一致。
