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根据古植物特征,“大西沟系”的古植物群属Djctyophyllum-Clathropteris植物群的晚期群落,而窑街群的古植物群则属于Coniopteris-Phoenicopsis植物群,因而“大西沟系”的时代早于窑街群.根据地层对比“大西沟系”与“羊肝石层”及武威南营几群为同期沉积,因而南营几群的上部有属于早侏罗世的可能,而“大西沟系”的下部有属于晚三迭世沉积的可能. 窑街群属中侏罗统,与南营几群呈假整合接触.晚侏罗统享堂群则假整合于窑街群之上. 红沟群由于古植物面貌与窑街群一致,又二者呈整合接触,因而红沟群不宜单独划出,而归于窑街群顶部.
According to ancient plant characteristics, the ancient flora of Daxigou is a late-stage community of Djctyophyllum-Clathropteris flora, whereas the ancient flora of Yaojie Group belongs to the flora of Coniopteris-Phenicopsis. Therefore, the “Daxigou” According to the stratigraphic contrasts, the Daxigou System, the Sheep Liver Stratum and the Wuwei Nanying Group were deposited in the same period, so the upper part of the Nanying Group may belong to the Early Jurassic, while the Daxi Gully "Belongs to the late Triassic deposition possible.Yaojie Street group is in the Middle Jurassic, andNanningFactor was a few groups of fake integration contact Late Jurassic enjoy Church group is false integration in the kiln street group above the red gully As the ancient plant surface and kiln street group consistent, and the two were integrated contact, so the red gully should not be individually drawn, and attributed to the top of the kiln street group.