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湖北均县习家店寒武系的研究始于50年代末,1965年1/20万内乡幅地质图将寒武系分为三统,未分组。1/20万郧县幅的寒武系分三统三组,即下统水沟口组,中统岳家坪组,上统蜈蚣Y组。项礼文(1981)把郧县幅寒武系的上述分组引用至中秦岭地层分区。项礼文等(1982)又把这些组名的应用范围扩伸至昆仑—秦岭区的寒武系。笔者将习家店的寒武系分为三统五组,下寒武统杨家堡组和岩屋沟组,中寒武统冯家凹组和习家店组,上寒武统蜈蚣丫组。
The study of the Cambrian in Xixia County, Hubei Province started in the late 1950s. In 1965, the geological map of 1/2 million inland maps divided the Cambrian into three groups and was not grouped. 1/2 Wan Yun County Cambrian Department of three sub-three groups, that is, the lower the Shui Mizoguchi group, the Central Plains Yuejiaping group, on the centipede Y group. Item Li Wen (1981) referred to the above-mentioned sub-Cambrian series in Yun County to the middle Qinling stratigraphic division. Item Li Wen et al. (1982) extended the application of these group names to the Cambrian-Qinling Mountains Cambrian system. The author divided the Cambrian of Xijiadian into three groups and five groups, the Lower Cambrian Yangjiapu Formation and Yanwugou Formation, the Middle Cambrian Fengjiacao Formation and Xijiadian Formation and the Upper Cambrian Centipede Yaku Formation.