Another place that I’ve been to recently and admired its geographical landscape is Mount St. Helens. The eruption on May 18, 1980 caused a monumental change in its geography, altering it to a point where it was unrecognizable. The current landscape is a combination of both aggradation and degradation caused by the rockslide debris that displaced the water of Spirit Lake, producing gigantic north part of the lake. When the water returned to the lake bed, it brought with it trees and soil in addition to material from the initial eruption, producing a 320-foot deposit where Spirit Lake once was. The current Spirit Lake is now 262 feet higher than it was before the eruption. A large part of the rockslide debris from the north side of St. Helens
