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Plate Tectonics: A scientific theory unfolds
the gradual movement and formation of continents (as described by plate tectonics)
the theory that the Earth's lithosphere is divided into tectonic plates that move around on top of the asthenosphere
places where two plates pull apart
when two tectonic plates push into one another
a place where two plates slip past each other moving in opposite directions
THe process of thrusting oceanic lithosphere into the mantle along a convergent boundary
a concentration of heat in the mantle capable of producing magma, which rises to Earth's surface; The Pacific Plate moves over a hot spot, producing the Hawaiian Islands
A buoyant mass of hot rock rising through Earth's mantle. As it nears the surface of Earth, some of the plume melts and erupts at the surface forming a "hot spot."
The temperature above which a material loses its magnetization.
volcanic island arc
a chain of volcanic islands generally located a few hundred kilometers from a trench where there is active subduction of one oceanic plate beneath another