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留凤关复理石,系指东秦岭冒地槽早三迭世留凤关群的复理石建造。它位于宝成铁路的凤县至聂家湾一带(图1),向西延至西秦岭。留凤关群,早有人认为属复理石沉积,不过都未提出具体资料。1954年,靳予贵在其所绘地质图中标出“复理石式沉积”。1957年,张尔道在其发表的文章中也指出“地层是一套具有复理式结构的轻微变质岩系”。1961年,孔凡宗在其所编1:20万凤县幅地质图说明书中进一步强调是复理石建造。最近,李继亮等从理论上作了高度的概括,并提到
Leave Fengguan marble, refers to the East Qinling bravo groove early three Diego Shi Fengguan group of flysch built. It is located in Baocheng railway Fengxiang to Niejiawan area (Figure 1), westward to the West Qinling. Leave Fengguan group, some people think that is a marble deposition, but did not make any specific information. In 1954, Jin Yugui marked the “complex marble deposition” in the geological map he painted. In 1957, Zhang Erdao also pointed out in his published article that “the strata are a set of slightly metamorphic rocks with a complex structure.” In 1961, Kong Fanzong further emphasized in his 1: 200,000 Fengxian Geological Prospectus that it was built of flysch. Recently, Li Jiliang, etc. made a high degree of theoretical summary, and mentioned