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A gorge is deep valley that is located between sheer cliffs that have been carved into the earth by the flowing of a river over a long period of time, the most famous gorge being
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Gorges are usually formed by water erosion. For example, when a waterfall retreats upstream, it erodes the rock at the base of a river valley, creating a gorge.
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Gorges are usually formed by erosion. Many times, a gorge has a river running through it, and over millions of years, the river eroded the rock away to form the gorge.
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The Three Gorges Dam is in China and spans the Yangtze River, and took over 14 years to construct. It is a hydroelectric dam, that the Chinese used to displace over a million people
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