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江西上饶以南铅山、广丰等地二叠纪煤系地层时代的讨论多年来一直为地质工作者所关注。1963年赣东北地质队在铅山新安埠一带“乐平煤系”底部的黑色页岩中采获Mexicoceras等茅口期头足类,将这一层位名为“湖塘组”,划归下二叠统。此后,不断地在煤系更高的层位,如“彭家段”的中、上部,“童家段”的下、中部,相继发现了早二叠世菊石和鲍,从而将本区上、下二叠统的界线逐步上延。李文恒(1975,1979)、李文恒、田宝霖和
Discussions over the age of the Permian coal measures strata in the Yingshan, Guangfeng and other places south of Shangrao, Jiangxi, have been of concern to geologists for many years. In 1963, the geologic team of northeastern Jiangxi province captured the Maoceou cephalopods, such as the Mexicoceras, in the black shale at the bottom of the “Leping coal system” along the Xin’anbu area in the Yushan Mountains. This layer was named “Hutang Formation” Permian. Since then, the Lower Permian ammonites and abalone have been continuously found in the lower and middle parts of the Upper Paleo-Tongliao and the “Tongjia Section” of the Upper Coal Measures, , The boundary of the Lower Permian gradually extended. Li Wenheng (1975,1979), Li Wenheng, Tianbao Lin and