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Antelope Canyon was formed by flash flooding, which would erode the rock in slot canyons such as this one fairly quickly.

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Lava River Cave was formed a few hours after a brief volcanic eruption and in comparison to other natural formations, it came to be what it is today fairly quickly.

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The Grand Staircase was formed by tectonic uplift along the Colorado Plateau, which fanned out and exposed the various layers of sediment and rock. The cliffs end at Bryce Canyon and are named for their colors. For example, there is chocolate, vermillion and so on.