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根据地层学研究的新进展，将原乐平组的官山段和下老山段划归茅口阶，编制了这一时期的沉积断面图，并对这一时期的沉积史进行了阐述。
According to the new development of stratigraphy research, the Guanshan and Xia Laoshan sections of the former Leping Formation were classified as Maokou, and the sedimentary sections of this period were compiled and the depositional history of this period was expounded.