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WordReference Random House Unabridged Dictionary of American English © 2024Grand′ Can′yon, - Place Namesa gorge of the Colorado River in N Arizona. over 200 mi. (320 km) long;
1 mi. (1.6 km) deep.
Collins Concise English Dictionary © HarperCollins Publishers:: Grand Canyon n - a gorge of the Colorado River in N Arizona, extending from its junction with the Little Colorado River to Lake Mead; cut by vertical river erosion through the multicoloured strata of a high plateau; partly contained in the Grand Canyon National Park, covering 2610 sq km (1008 sq miles). Length: 451 km (280 miles). Width: 6 km (4 miles) to 29 km (18 miles). Greatest depth: over 1.5 km (1 mile)
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