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一、地槽区的发育在上一篇文章中已指出,地槽带在其演化中经历一系列时期或旋迥,其延续时间从300—400百万年(较早的)到150—200百万年(较晚的)。对各个地槽区,特别是组成地槽带的地槽系而言,发育最活跃的时期是最后一个期(旋迥),有时是倒数第二个期,这个期以地槽区彻底转变为褶皱山区,而地槽系彻底转变为褶皱山脉而告终,其后在这一区域确立了陆台体制。这个期(旋迥),确切说以沉降为主的前半期,叫做主地
1. Development of the Terrain Area In the previous article, it was pointed out that the terrain zone experienced a series of cycles or cycles during its evolution, with a duration extending from 300-400 million years (earlier) to 150-200 Millions of years (later). For each geosyncline, especially the geosyncline, which constitutes the tectonic belt, the period of the most active development is the last period (rotation), sometimes the second-to-last period, in which the geosyncline area is completely transformed into Fold the mountainous area, and the trough system completely transformed into folds of the mountains and ended, then set up in this region land system. This period (spin around), to be exact that the first half of settlement, called the main land