【摘要】 通过长江三峡地区新构造运动、中更新世大姑冰期冰川作用及其后河流袭夺作用的研究,提出长江三峡发育前后历时70～100万年,大体经历三个阶段:(1)早更新世鄂西期夷平及其抬升解体;(2)中更新世大姑冰期来临并覆盖了所有超出当时雪线(相当今日海拔高程800～900m)以上的山原和山谷,形成巨大的冰盖和山谷冰川;(3)冰川溯源刨蚀,使位於东西两侧的峡江冰川和川江冰川之间的分水岭齐岳山-巫山山原冰盖日益缩小,最终打通分水岭并袭夺了西部河流水系使之改向东流,形成今日三峡景观。更多还原

【Abstract】 In the light of study on neoteconism, the authors suggest the Yangtze Gorges were gradually developed in a period of 7 to 10 million years and show close genetic relationship with the Middle Pleistocene glaciation and later river capture, and three evolution stages have been formulated: (1) Early Pleistocene planation, elevation and dismembering of the "plateau mountain", (2) Middle Pleistocene glaciation (Dagu glaciation) with all the "plateau mountain "and mountain valleys above snow line being glacier-covered;(3) retrogressive glacial erosion resulted in gradual shrinkage and moving westwards of the ice sheet on the watershed (the Qiyueshan Mt. and Wushan Mt. )between the Xiajiang and Chuanjiang glacier, and finally the watershed was cut through, the western water system was captured and the Yangtze river flowed eastwards since then.更多还原