MICHAEL SZOENYI / SCIENCE PHOTO LIBRARY MICHAEL SZOENYI / SCIENCE PHOTO LIBRARY
Ancient landslide. Limestone cliff in a mountain valley. The cliff is part of a larger area of rock that was exposed following a large landslide (the Flims event) some 10,000 years ago at the end of the last Ice Age. This event took place in what is now Switzerland. The landslide took place because a glacier had eroded the mountainside, weakening the rock. As the glacier retreated, the rock broke off in a massive landslide. The river eventually eroded a new course for itself, forming what is called the Rhine Canyon. Only the Rhaetian Railway runs through the canyon, which is otherwise inaccessible other than by foot.
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