Above the havoc, a cloud of volcanic steam and ash ... try Lassen Peak. Four types of volcanoes—shield, composite, cinder cone, and plug dome—can be found in Lassen Volcanic National Park ...

temporary volcanoes on its flank. The most recent was "Murara," a cinder cone that emerged between 1976 and 1977. The mountain is also surrounded by old lava flows that spilled down its slopes (and ...

temporary volcanoes on its flank. The most recent was "Murara," a cinder cone that emerged between 1976 and 1977. The mountain is also surrounded by old lava flows that spilled down its slopes ...