The Changing Face of Earth - Plate Tectonics

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The Changing Face of Earth - Plate Tectonics - Intro

	PLATE TECTONICS

Index

Plate Tectonics
...Introduction
...The Plates
...Cont. Drifting
...Rifts
...Oceans
...Mountains
...History
...Interesting Facts

Geologic Time

Rocks

Canada's Geology

Glossary

Bibliography

"Plate tectonics is an all-embracing concept that has revolutionized the Earth sciences in the 20th century"¹. This concept explains that the lithosphere, the outermost shell of our world, is divided into a number of rigid plates floating on a rugged layer of the upper mantle. The upper mantle envelopes the mantle, in which the convection currents take place which envelopes the mantle. New oceans are formed as a result of a new crust been formed as two plates move apart; and the collision and destruction of opposing plates explains the formation of the world's mountain belts.

¹ The Grolier Multimedia Encyclopedia

PLATE TECTONICS