Plate Tectonics

Plate Tectonics is the theory that the lithosphere (the outer part of solid Earth) is divided into a small number of plates that float on and travel independently over the plastic layer of the Earth's mantle (the asthenosphere). Much of the Earth's seismic activity and volcanism, along with mountain-building processes, occurs at the boundaries of these plates.

Volcanos

Continental Drift

Plate Tectonics - basic quick intro, good if you know nothing about this subject

This Dynamic Earth:The Story of Plate Tectonics, by W. Jaquelyne Kious and Robert I. Tilling, (on-line edition) from the U.S.Department of the Interior - U.S.Geological Survey

The ABC's of Plate Tectonics - by Donald L. Blanchard

Plate Tectonics - in GondwanaLand page

STRUCTURE OF THE EARTH AND PLATE TECTONICS

PLATE TECTONICS - FORCES AND FEATURES

July 1996 PaleoMap Prospectus various geotopics including plate tectonics

Yahoo Plate Tectonics links

plate tectonics icon from This Dynamic Earth:The Story of Plate Tectonics, by W. Jaquelyne Kious and Robert I. Tilling, (on-line edition)