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Yosemite landslide: caught in the act: deadly slide is glimpse of process that shaped Yosemite National Park.
When 162,000 tons of granite suddenly broke free of a cliff in Yosemite National Park last July, rock climber Ed Youmans was there to witness the awesome event and capture it on film.
The landslide, which occurred on July 10, created an "air blast" that felled hundreds of trees. This event gave geologists a rare glimpse at the processes that have sculpted Yosemite's landscape over millions of years. But tragically, the disaster also killed a hiker and injured 14 other people.
At 6:52 p.m., the moment the landslide came crashing down, Youmans was ascending Washington Column, about 1.5 miles from Glacier Point. He heard a loud crack. "At first I thought it …
