rough country follows the river
mikdbow (Premium member) > albums > China OAT Yangtze River
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The Three Gorges of Yangtze River is located in east Sichuan folded zone and Bamian Mountain folded zone and belongs to the part of upwared zone in Neocathaysian structural system. This area was subjected to several structural changes. The Jinning Movement before the Sinian Period caused the metamorphosis of rock, the folding of rock formation and the magnetic intrusion, and thus forming palaeogeologic structure with the crystal bed-rock mainly toward northwest. During Sinian period to Triassic Period, the structural Changes were mainly vibration or elevation and subsidence movement, and there was no folding and magnetic intrusion. The Yenshan movement occurred at the end of Jurassic Period mainly embodied in the folding and disrupter of overlying strata, thus laying down the present structure. The Himalayan movement mainly utilized and reformed the ruptured structural face of the early-formed structure and folding was not developed. In recent period, new structures are characterized by large-area upward zone and there are no movements with marked difference. In this area, the strata all emerged out except the lack of strata in the upper Devonian, carboniferous and Triassic periods, which is the natural records revealing the process of geological evolution in the Three Gorges area.
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