EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS
A theory of global tectonics in which the lithosphere is
divided into a number of plates whose pattern of horizontal movement is
that of torsionally rigid bodies that interact with one another at their
boundaries, causing seismic and tectonic activity along these boundaries.
Jackson, J.A.(1997) Glossary of Geology. 4th ed. Alexandria, VA:American
Geological Institute.769 p.