Devoir de Philosophie

Mount Saint Helens - geography.

Publié le 26/05/2013

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Mount Saint Helens - geography. Mount Saint Helens, active volcano, southwestern Washington, in the Cascade Range. The volcano, which had been dormant since 1857, began to show signs of renewed activity in early 1980 when a column of magma (molten rock) began pushing up inside the mountain, causing the north face of the mountain to bulge out. On May 18, 1980, an earthquake caused a l...

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