The peaks of the Lewis Range of the Rocky Mountains tower over Upper Waterton Lake in Waterton Lakes National Park in Alberta, Canada. These mountains were formed 170 million years ago as a result of an overthrust where colliding tectonic plates shoved a huge rock slab, half a dozen kilometers thick, eastward more than 100 kilometers. The peaks were then sculpted by glaciation. This range reaches a height of over 3, 000 meters and forms the eastern edge of the Rockies along the Montana-Alberta border. It extends from Glacier to Waterton Lakes National Parks. | |
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Crédit : | Science Photo Library / Matulavich, Peter |
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Durée : | 23 Secondes |
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