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松辽盆地经多年来地质生产和科研活动，已经建立了一套完整的地层层序，由下往上为：沙河子组、营城组、登娄库组、泉头组、青山口组、姚家组、嫩江组、四方台组、明水组等９组２７个岩性段。白垩系的上限在明水组和依安组之间，相当于马斯特里赫特阶的顶界，同位素年龄为６６Ｍａ。白垩系的下限在沙河子组和火石岭组之间，相当于贝利亚斯阶的底界，同位素年龄为１４４Ｍａ。松辽盆地白垩系属陆相地层，三分性明显，自然划分为下、中、上三统，这种划分方案正被更多的地质工作者所接受。
After years of geological production and scientific research activities, the Songliao Basin has established a complete sequence of stratigraphy. From bottom to top are: Shahezi Formation, Yingcheng Formation, Denglouku Formation, Quantou Formation, Qingshankou Formation, Yaojia Formation, Nenjiang Formation, Sifangtai Formation, Mingshui Formation and other nine groups of 27 lithologic sections. The upper limit of the Cretaceous is between the Mingshui Formation and the Yi’an Formation, corresponding to the top of the Maastrichtian order with an isotopic age of 66 Ma. The lower limit of the Cretaceous is between the Shahezi Formation and the Huoshiling Formation, corresponding to the bottom of the Beliberian order with an isotopic age of 144 Ma. The Cretaceous in the Songliao Basin is a terrestrial formation with obvious trichotomy, which is naturally divided into the lower, middle and upper trinocular systems. This division scheme is being accepted by more geologists.