摘要
根据地质资料分析,桂东南地区存在着灵山和博白两个不同时期的地体。它们都以深大断裂为界。先后增置和拼贴在华夏古板块上。 博白地体与云开古陆的拼贴发生在郁南运动。灵山地体与博白地体的焊接发生在东吴运动,而十万大山海的关闭则在印支运动时期,因而印支运动是该地区由海变陆成山的转折点。
There are two terranes, Linshan Terrane and Bobai Terrane, which formed in different time. Both of them are boundaries with deep faults, accreted on and amalgamated with Cathysian Plate.
The time of amalgamation between Bobai Terrane and Yuankai Old Land happened during Yuenan Movement, and Lingshan Terrane and Bobai Terrane during Dongwu Revolution. The Shiwandaoshan Ancient Sea enclosed during Indo - Sinian Movement. Therefore, Indo-Sinian Movement was the cause which turned the region from sea to terrane.
