Figure 1 Riprap at Tallinn harbour
Peter Wade-Wright
Water can do a lot of damage. Given enough time, mountains can be levelled by it as water seeps into the tiniest of crevices and then expands upon freezing and so cracks the rock further.
There is also the erosion caused by rain and swift-f lowing streams, and the damage and changes to land caused by rivers and the pounding of the sea is obvious everywhere it occurs, as tonnes of sand, stones and rocks are shifted, apparently effortlessly.
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