东南沿海一带的经色岩层可以说相当发育,但是因为缺乏古生物方面的证据,地层的划分至感困难,1938年陈国达氏曾著中国东南部红色岩层之划分一文,依岩性,构造及层位关系,首先划分红色岩层为新老两部,老红岩为南雄层,相当於建德系火山岩系,新红岩即丹霞层及广州层为第三纪早期产物,惟其後仍迭有争辩,迄今未有定论。 Sedimentary strata along the southeast coast can be quite developed, but because of the lack of evidence of palaeontology, stratigraphic division is difficult. In 1938, Chen Guodar once classified the red strata in southeastern China according to lithology, structure and horizon Relationship, the first division of the red rock for the old and the new two, Laoyongyan Nanxiong, which is equivalent to the Jiande volcanic rock series, the new Hongyan that Danxia and Guangzhou layers for the early Tertiary, but then still Diego Argument, so far no conclusion.