National Geographic : 1937 Mar
THE NATIONAL GEOGRAPHIC MAGAZINE FIRE-BREATHING MAZAMA GREW TO MAGNIFICENT STATURE Slow but persistent volcano building gradually lifted the mountain higher and higher. A second ary cone developed on its western slope. Whenever the giant was dormant, glaciers cooled its head, and forests mantled its slopes, only to be destroyed at the next eruption. THE VOLCANO SMOLDERS BENEATH ITS ICY COVER When the lava cooled, vast rivers of ice formed on top and moved in resistless majesty down the slopes. Broad valleys that remain today are verdure-clad reminders of the last glacial stage in the history of Mount Mazama.