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依据禄丰县川街剖面修订了昆明小区曾经使用半个多世纪的上、下禄丰系(群、组)岩石地层单位,厘定并重新命名了禄丰组(包括沙湾段和张家坳段),新建川街组、老罗村组、麻地山组,沿用安宁组,首次在禄丰区域内划分出上侏罗统。结合各组产出的化石,建立起侏罗纪早、中、晚3套脊椎动物群序列。进一步的考察研究又确认出昆明小区存在上三叠统舍资组和侏罗系的连续沉积。通过对比,确定昆明小区中侏罗统川街组底部和上侏罗统安宁组顶部,缺失楚雄小区张河组下部“绿砂岩段”和妥甸组上部“黄色泥岩段”。首次发现晚侏罗世妥甸组昆虫化石,昆虫化石的类型和叶肢介等门类化石有别于北方动物群。依据这些研究成果提出康滇地层分区侏罗系对比方案。
Based on the profile of Sichuan Street in Lufeng County, the upper and lower Lufeng (Group, Formation) lithostratigraphic units that had been in use for more than half a century in Kunming Sub-district were revised and the Lufeng Formation (including Shawan Section and Zhangjiaodao Section ), Newly built Sichuan Street Group, Laoluo Village Group, Maadi Mountain Group, followed by Anning Group, for the first time in the Lufeng area divided into Upper Jurassic. Combined with fossils from each group, three sets of vertebrate sequences of early, middle and late Jurassic were established. Further investigation and study confirmed that there are continuous deposition of Upper Triassic and Jurassic units in Kunming district. By comparison, the bottom of the Middle Jurassic Chuanjie Formation in Kunming district and the top of the Anning Formation in the Upper Jurassic are identified, and the “green sandstone” in the lower part of Zhanghe Formation and the “yellow mudstone” in the upper part of the Tuodian Formation are missing in the Chuxiong area. For the first time, the late Jurassic Tuodian group found that the types of fossil insects and leaf fossils are different from the northern fauna. According to these research results, the stratigraphic division of the Jurassic stratigraphic in Kangdian is proposed.