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利用裂变径迹法和ＫＡｒ 稀释法对松辽盆地白垩纪年代地层进行了研究。结果表明， 泉头组及其以上地层的实测年龄与生物地层、磁性地层所推断的各组的地质年龄基本一致， 上、下白垩统的界线应划在青山口组和泉头组之间； 而泉头组以下地层， 实测年龄与生物地层、磁性地层所推断的年龄值有较大的偏差（ 认为火石岭组应为早白垩世最早期沉积）， 并据此对下白垩统各组的地质时代归属提出了新的见解。
Cretaceous chronostratigraphy in Songliao Basin was studied by using fission track method and KAr dilution method. The results show that the measured ages of the Quantou Formation and above strata are basically the same as the geological ages of each group inferred by the biostratigraphy and magnetic stratigraphy. The boundaries between the upper and lower Cretaceous should be plotted between the Qingshankou Formation and the Quantou Formation. The following strata in Quantou Formation have a large deviation from the age measured by biostratigraphy and magnetic stratigraphy (think that the Huoshiling Formation should be the earliest deposition of Early Cretaceous) The era of ownership put forward new ideas.