BERNHARD EDMAIER / SCIENCE PHOTO LIBRARY BERNHARD EDMAIER / SCIENCE PHOTO LIBRARY
Goosenecks canyon. Aerial view across the entrenched meandering of the San Juan River, which has formed a highly curved "Goosenecks" canyon. This is a classic example of an entrenched river meander. Hundreds of thousands of years ago, the river curved its way slowly across a plain. Over the intervening time, the plain has been slowly uplifted but the flow of the river has not dramatically increased in speed. Thus the river has slowly cut into the layers of the plain without altering its course. The canyon of the San Juan River is here over 300 metres deep and runs for several kilometres. Photographed in the Goosenecks State Park, Utah, USA.
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