“老红砂”在福建平潭岛以南的华南沿海地区都有断续分布。现依福建东山县康美乡公路旁的人工剖面,探讨有关“老红砂”的成因问题。 一、剖面描述 康美剖面位于东山县西埔镇到旧城关镇之间的公路旁(图1)。这一带广泛分布着红色砂,即一般所说的“老红砂”。厚度约15米—20米,宽度约100米,向南延伸约3公里,分 “Old red sand” in Fujian Fujian Pingtan Island south of the coastal areas have intermittent distribution. In accordance with the artificial section next to Kangmei Township, Dongshan County, Fujian Province, to explore the causes of “red sand”. I. Profile Description Kangmei profile is located along the road between Xipu Town, Dongshan County and the old town (Figure 1). This area is widely distributed red sand, the so-called “old red sand.” Thickness of about 15 meters -20 meters, width of about 100 meters, extending to the south about 3 km, points