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EncyclopediaMount Saint Helens:Mount Saint Helens: see Saint Helens, Mount. The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2007, Columbia University Press. All rights reserved. More on Mount Saint Helens from Infoplease:
- Mount Saint Helens - Dormant since 1857, Mount St. Helens erupted on May 18, 1980 in one of the largest volcanic explosions in North American history.
- Mount Saint Helens - Saint Helens, Mount Saint Helens, Mount, volcanic peak, 8,363 ft (2,549 m; 9,677 ft/2,950 m before ...
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