California’s Strangest Geology: The Crowley Lake Columns They look like Roman ruins rising from the desert. Fluted. Symmetrical. Architectural. But the Crowley Lake Columns on the eastern shore of Lake Crowley were not carved by human hands. They were formed 760,000 years ago after a massive eruption created the Long Valley Caldera. Snowmelt and groundwater moved through hot volcanic ash, hardening vertical mineral channels into stone. When Lake Crowley was created in 1941 and waves began cuttin

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