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Bibliography

click here for defenitions

Wikipedia

. "Wikipedia." Wikipedia. 4 June 2007. Wikipedia. 5 june 2007 <http://en.wikipedia.org/wiki/Plate_tectonics#Key_principles>.

Volcanoe world

. "Volcano world." Volcano world.University of North Dakota. 5 june 2007 <http://volcano.und.edu/>.

Plate tectonics

. "Plate tectonics." Plate tectonics.11 June 2007 <http://geology.csupomona.edu/drjessey/class/Gsc101/Plate.html>.

The cause of earthquakes

J. Louie. "Plate tectonics, the cause of earthquakes." . 11 may, 01. June 11, 07 <http://www.seismo.unr.edu/ftp/pub/louie/class/100/plate-tectonics.html>.