The Grand Canyon is in the territory of the United States of America. It's valley was shaped by the Colorado River for thousands of years as it's waters covered the bed, deepening the over 446 km. Comes to measuring between 6 and 29 km wide and reaches depths of 1600 meters. About 2 billion years of geological history of Earth were exposed by the river, as this and it's tributaries cut through layer after layer of sediment.
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