冰川在许多山脉的山谷里蜿蜒而下。这些庞大的冰体是由一层层雪花堆积在一起的,直到重量足够,于是结成冰晶体。等到这个冰体变得又厚又重,它就会开始朝低的方向移动,如格陵兰和南极洲上的巨型穹状冰盖,或者沿山谷蜿蜒而下,如这里所介绍的阿大巴斯卡冰川。冰川的冰移动得很慢,一天移动不到1米。这条冰川在磨过两旁的山壁时,刮下了所有松脱的岩石,并且把它们随着冰块带下山去。最后,冰川的冰在远远的山谷融化时,其中所夹带的岩石、砾石和细岩 The glaciers wind down in the valleys of many mountains. These huge ice bodies are stacked together by a layer of snowflakes, until the weight is enough, so the formation of ice crystals. When it becomes thick and heavy, it begins to move in the lower direction, such as giant dome-shaped ice sheets in Greenland and Antarctica, or winds down valleys, glacier. The glacier’s ice moves very slowly, less than 1 meter a day. The glacier scrape off all the loose rocks as they mow on both sides of the mountain and bring them down the mountain with ice cubes. Finally, when the glacier ice melts in the distant valley, the rocks, gravels and fine rocks entrained in it