MICHAEL SZOENYI / SCIENCE PHOTO LIBRARY MICHAEL SZOENYI / SCIENCE PHOTO LIBRARY
River gorge. Bridge over a river gorge. This is a gorge that has been formed by the Areuse river as it cuts through rocks near La Chaux-de-Fonds, Neuchatel, Switzerland. The river eroded the gorge after finding and widening a fault in the rocks, formed by tectonic movements in the Earth's crust.
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