Phenomena

The Roaming Rocks of Death Valley

The dry lake beds of Death Valley National Park in California are home to a perplexing phenomenon: roaming rocks. These rocks, some of which weigh hundreds of pounds, leave long furrows in the dirt but have no obvious means of propulsion. One theory posits that the rocks glide on collars of ice around their base. The ice acts like a flotation device when rain wets the valley and then the rocks slide so easily that high winds can move them across the surface. #

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