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1968年8月,沉寂的四川省某山村,忽然听到一大片滚雷似地轰鸣,人的惊魂稍定才知发生了滑坡。一面山坡整体下滑,滑体前端越过小河,冲上对岸,堵塞河道,形成堰塞湖。滑体从海拔高程675米的最高后缘,到高程308米的河边头部,高差达367米。地物水平滑距200余米。滑体前部房屋树木多随之原位滑移,有的完好无损,没事一样,真象是在“魔毯”上飘动。滑体后部则飞山走石,滑动岩堆成行排列有如军舰列队。虽历经20多年,各种滑动岩堆、滑坡壁、堰塞湖水域陡岸,现在仍然十分清晰壮观。为什么这里要滑坡答案还得从本处地质环境说起。本处岩层属侏罗系上统遂宁组,岩性为砖红色厚层泥岩,夹少量薄尾砂岩。岩层倾向285°,倾角20°,单斜构造,形成走向近南北的单面山。未见断层,但两组交叉X裂隙遍布,倾角85°。滑坡壁即沿这两组
August 1968, a quiet mountain village in Sichuan Province, suddenly heard a huge roll-thunder and roaring, people were a little bit surprised that a landslide occurred. As the whole slope slides down, the front of the slide over the river, rushed to the other side, blocking the river, the formation of dammed lake. The slide from the elevation of 675 meters highest trailing edge, to the elevation of 308 meters river head, the height difference of 367 meters. Landslide level of more than 200 meters. Most of the trees in the front of the body slip along with the original slippery, and some intact, nothing, the truth is “magic carpet ” on the fluttering. Slide the back of the flying stone, sliding rock pile arranged in rows like warships lining up. Although more than 20 years have passed, the steep banks of various sliding rocks, landslide walls and dammed lake waters are still very clear and spectacular. Why do we have to answer the landslide here from the geological environment. The rock formation is Jurassic Suining formation, lithology brick red thick mudstone, with a small amount of thin tail sandstone. The rock formation is inclined at 285 ° with dip angle of 20 ° and has a monoclinic structure that forms a single-sided mountain that runs north and south. No faults were observed, but the cross X fractures spread over the two groups with an inclination of 85 °. The landslide is along these two groups