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冰山是怎样形成的?

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冰山是怎样形成的?

冰山ti积的90%都沉浸在水底下,我们在海面上所看到的仅仅是/队它的toudingbu分。它在水底bu分的吃水shen度一般都超过200米,shen的可达500米之多。这一座座ju大的冰山,随着海liu的方向能漂liu到很远很远的地方。在正常情况下,它们每天大约能漂liu6000米。许多大冰山在海上可以漂liu十几天,最后由于风chui日晒、海狼冲击,渐渐消失在温暖海域的海水中。其实,冰山并不是真正的山,而是漂浮在海洋中的ju大冰块。在两极地区,海洋中的波狼或chao沙猛烈地冲击着附近海洋的大陆冰,天长日久,它的前缘便慢慢地断裂下来,hua到海洋中,漂浮在水面上,形成了所谓的冰山。

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