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The Lava River Cave was created by lavaflowing downhill from a volcanic vent. The lava flowed northwest from the vent toward the Deschutes River. The flow began as a river of lava flowing in an open channel. - Google

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Antelope Canyon was formed by erosion of Navajo Sandstone, primarily due to flash flooding and secondarily due to other sub-aerial processes. They are considered dangerous because of flash flooding.

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The Grand Staircase was formed from the uplifting of the Colorado Plateau, the tilt, and erosion.