EARTH 107 Lecture Notes - Lecture 1: Shield Volcano, Mount Pinatubo, Stratovolcano

• School: U of M
• Department: Earth and Environmental Sciences
• Course: EARTH 107
• Professor: Larry Ruff

Document Summary

Volcanoes are places where magma reaches the earth"s surface. When the magma erupts, two different eruptive styles. The single greatest eruption of the 20th century. H20, carbon dioxide, varying amounts of sulfur. Take a global view, the very first hypothesis we might have is that volcanoes are random. They occur on linear belts on land and around ocean. Distribution of volcanoes, we want to see if they"re random or not. Most people think they are not random. From british columbia washington oregon ends in mount shasta. Right in the middle of atlantic ocean. Most volcanoes are associated with subduction zone plate boundaries. Associated: as the above map shows, the official subduction zone plate. Boundary is the deep trench located off-shore, but the volcanic belt is about 100 km, or more, inland from the trench. A scientific revolution in the earth sciences.