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中国上前寒武系南北之间的对比和衔接问题,一向为地质界所关注,七十年代后期起,普遍都将峡东(南)震旦系(以莲沱组为底)置于青白口群(北)之上。然而,处于两大类
The contrast and convergence between the north and south of the Precambrian in China have always been of great concern to the geological community. Since the late 1970s, the Sinian system in the east (south) of the Gorge Mouth group (North) above. However, in two broad categories