Overview: To most people, travel is an exciting experience. When one journeys around the world, one is struck by the great variety and beauty of the landscapes that one encounters. The scientific mind, naturally, is not satisfied with admiring the various landscapes, but would like to understand how they were formed. The exact theory of landscape formation is a very com plicated affair, but much can be learnt from accurate observation. The need for the present little book became apparent to the writer during his studies of the mechanics oflandscape formation. It turned out that there was, in
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