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李四光（１９２４）在长江三峡建立的宝塔石灰岩是一个符合《国际地层指南》原则的组级岩石地层单位，其原始定义应予恢复。那些后来从中肢解出来的牯牛潭组、庙坡组、宝塔组（狭义）、临湘组则应降为次一级的岩石地层单位——段。因为段名与组名不能重复使用，而宝塔一名已被组名所占用，故提出普溪河段代替宝塔段。普溪河段与过去使用的狭义宝塔组定义相同，它的层型剖面在湖北省宜昌县分乡镇北普溪河桥南端
Li Siguang (1924) The pagoda limestone established in the Three Gorges of the Yangtze River is a unit of lithostratigraphic unit that complies with the principles of the “International Stratigraphy Guide” and its original definition should be restored. Those from the Mid-limbs, ie, the Qiu Nitan group, the Miaopo group, the Pagoda group (in the narrow sense) and the Linxiang Formation should be reduced to sub-level lithostratigraphic unit-segments. Because the section name and group name can not be reused, and a pagoda has been occupied by the group name, it is proposed Pu River section instead of pagoda section. The section of Puxi River is the same as the narrow pagoda group used in the past. Its layer profile is located at the southern tip of Beipu River Bridge in Yichang County, Hubei Province