The magnificent cone of Mount Rainier has repeatedly undergone sudden, dramatic change. Eruptions of lava and ash have built the cone thousands of feet above the surrounding terrain while other geologic forces glaciers, landslides, and debris flowshave acted to tear it down. Landslides and debris flows are particularly hazardous because although they happen relatively infrequently, when they happen in the future, they could have a destructive effect on people in nearby communities. -- Walder and Driedger, 1995 |