Brink Of The Upper Falls, Yellowstone National Park photo

Robert Jones | all galleries >> US West - South West >> 2006 >> Yellowstone (Day 3) > Brink Of The Upper Falls, Yellowstone National Park

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Brink Of The Upper Falls, Yellowstone National Park

The upper falls are 109 feet (33 m) high. The brink of the upper falls marks the junction between a hard rhyolite lava flow and weaker glassy lava that has been more heavily eroded.

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