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A circa 1920's watchtower atop of Mount Harkness, an extinct shield volcano (8042 feet). A huge caldera-like depression is just behind the tower. Ejecta can be seen all down the caldera side of the peak. There's not much doubt as to which way this puppy blew, and it blew BIG.

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Photographs of Lassen National Volcanic Park during a late June snowstorm. Lassen National Park, volcano, snow, Juniper Lake, Mount Harkness, Plumas County, photographs, pictures, travel, tourism, california