Oceanic subduction zone
General diagram of an oceanic subduction zone. Sumatra and the Andaman Islands are part of an island arc.
this figure is taken from the online edition of This Dynamic Earth
This Dynamic Earth
This product gives a brief introduction to the concept of plate tectonics and complements the visual and written information in This Dynamic Planet, a map published in 1994 by the U.S. Geological Survey (USGS) and the Smithsonian Institution. The product highlights some of the people and discoveries that advanced the development of the theory and traces its progress since its proposal. Although the general idea of plate tectonics is now widely accepted, many aspects still continue to confound and challenge scientists. The earth-science revolution launched by the theory of plate tectonics is not finished.