Through mapping, the authors propose that between the Wutai Group and Hengshan gneissic complex there exists a gneiss layer which still belongs to strata and...

• 与地层呈渐变关系的片麻岩体外貌复杂、边界不清，不同于具有一定侵入关系、边界明显、成分均一的片麻岩体，据此划分了原地片麻岩体与异地片麻岩体两个系列。