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最终将海洋侵蚀土地吗?

似乎地球的能量最低的状态是没有任何高山和给予足够的时间,海洋将侵蚀所有土地。本质上这是一个论点像熵。我的意思是远未来,一旦构造活动停止。

这是如此,如果是这样可能要花多长时间?如果不是这样,为什么不呢?

回答

你的问题是部分有缺陷的,因为它不是海洋侵蚀大洲。取而代之的是集体称为剥蚀侵蚀,所有进程的总和inclusing风化、斜率流程和河流过程减少地形的大洲。这些过程的水平往往将海洋水平,确定为基础水平。说几个过程可能侵蚀基面以下的水平。深风化可能对低于这一水平,但可能只有几十米。冰川过程绝对可以侵蚀公里低于海平面,但这是局部的山谷(可能在基岩断裂区)形成峡湾,可能被侵蚀到1海平面以下1.5公里。添加到这个情况,我们必须考虑到海平面波动取决于海洋盆地realtive大洲的分布。新海底相对高海拔相比老海底由于密度的差异。水也可以积累在陆地上冷时期可以导致海平面变化。因此,海平面还远未通过时间常数。 An implication of the question is what will happen in the future. I will assume the earths interior will cool with time chaning the continental drifting. With slowing drifting mountain building will decrease so that denudation will likely be dominating. A problem here is that we probably need to consider loss of atmosphere and other issues that we do not know much about. There are indictions from Mars that water has been more abundant in teh past yet the topography on Mars is significant because the erosional processes have lost their poser as loss of water may have been critical. So what will happen in the futiure depends on how tectonic and atmospheric processes change in the distant future due to changes or development in both the earth's interior and the atmosphere in terms of water content (water being a critical componete in both weathering of rocks abnd transport of material in topgraphic terrain). To conclude, the question is much larger than can first be thought and we need to consider large time frames in which many of existing processes and systems will drastically change. So to provide a time frame is very difficult and essentially pointless.

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