Volcanoes Map

This map shows where volcanic eruptions have occurred on Earth.  Each volcano is represented as a small red triangle.  These triangles occur all over Earth, but there are particular areas where the triangles occur most often, making a distinct pattern.  This volcano map is supposed to be printed on transparent plastic, so it can be used as an overlay on top of the map that Marie Tharp made.  When the maps are combined, the volcano data shows a pattern.  The locations of volcanoes follow many of the shapes Marie Tharp mapped.  Volcanoes occur along the coast of many countries in Eastern Asia, and North and South America like Chile and the United States.  The locations of volcanoes also correspond with the locations of mountain ranges in the Atlantic and Pacific Oceans and with the mid ocean rifts that Marie first mapped.