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府君山组是寒武纪最早沉积的地层,发育在唐山—北京及平泉—兴隆地区。主要为灰色、深灰色厚层质纯灰岩、白云质灰岩、豹皮状灰岩,底部普遍发育有砂砾岩层。与下覆上元古界呈平行不整合或微角度不整合接触;与上覆馒头组平行不整合或整合接触。厚度自东向西,由100多米变为几米,至涞源一带尖灭。山海关一带厚度最大为169米,组成岩溶丘陵地形其形态有(参见封二照片): 1.溶痕:地表水或降水沿石灰岩层面溶蚀,形成
Fu Jun Shan Formation is the earliest Cambrian sedimentary strata, developed in Tangshan - Beijing and Pingquan - Xinglong area. Mainly gray, dark gray thick layer of pure limestone, dolomitic limestone, leopard skin limestone, the bottom of the widespread development of glutenite layer. It is parallel unconformity or micro-angle unconformity contact with the Proterozoic under the overburden, unconformity or integration contact with the overlying steamed bread group. Thickness from east to west, from a few meters into a few meters, to the source of the tip out. The maximum thickness of Shanhaiguan area is 169 meters, forming the karst hilly topography (see photos in cover two): 1. The dissolved marks: surface water or precipitation erosion along the limestone layer to form