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在双湖地区肖茶卡一带上三叠统肖茶卡群中发现2套砾岩,根据岩石组合、生物化石和界面特征,以2套砾岩为标志层,将原肖茶卡群分解为3个组级岩石地层单位,由下至上分别为肖切堡组、角木茶卡组和日干配错组。从岩石地层、生物地层和层序地层方面阐述了3个组级地层单位的特征和划分的意义。
Two conglomerates were found in the Triassic Xiaochaka Group in the Xiaochaka area of Shuanghu area. According to the rock assemblage, biological fossils and interface characteristics, two sets of conglomerates were used as the marker layer to decompose the original Xiaochaka into Three units of lithostratigraphic units, from the bottom up were Xiao Chaobo group, Kokwood Chaka and Nikko mismatched group. From the lithostratigraphy, biostratigraphy and sequence stratigraphy, this paper expounds the significance of the characteristics and division of strata units in three groups.