本文所述及的地区在地质构造上属黄汲清先生所划分的华南加里东褶皱带的范围。该区在下古生代时期为冒地槽,志留纪时发生加里东运动,褶皱隆起,结束了地槽阶段。加里东运动之后,此区仍不断经受构造运动,成为比较典型的构造活化区。主要表现为:在海西时期一些地带强烈断陷,堆积了巨厚的沉积物,如湘南、河池—南丹等地区;印支—燕山时 The area described in this article is a range of South China Caledonian fold belts divided by Huang Jiqing in geological structure. In the area of ​​the Lower Paleozoic, the area was a gorges basin. During the Silurian period, there occurred the Caledonian movement, folding uplift and ending the geosyncline stage. After the Caledonian movement, this area still continues to undergo tectonic movements and becomes a typical tectonic activation area. Mainly manifested as follows: during the Hercynian period, some areas were severely subsided and huge sediments were accumulated such as Shonan, Hechi-Nandan and other areas; Indosinian-Yanshanian