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There are no animations for this chapter. See the additional resources below.

Additional Resources

The abundance of geology-related websites speaks to the active and exciting nature of this field. In the space below we link to external websites that explore topics covered in this chapter.

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	Savage Earth: The Hot Zones 9/20/2004 PBS
		This series of animations illustrates the concepts of subduction, sea-floor spreading at a mid-ocean ridge, and continental collision.

	Continental Drift Animation-- Wegener Fit 4/22/2005 Declan DePaor, ScienceProf.com
		This animation presents a view of the continents at the level of map precision available to Alfred Wegener, who proposed that the continents once existed as a vast supercontinent, Pangea, that later fragmented. Test the fit of the continents for yourself by clicking and dragging a continent to a new location; then, using the arrow keys on your keyboard, rotate the continent into position.

	Continental Drift Animation -- Bullard Fit 4/22/2005 Declan DePaor, ScienceProf.com
		The Bullard fit animation of Continental Drift includes the continental shelves and shows how Africa, South America, Europe and North America may have once fit together.

	Magnetic Reversals Animation 4/22/2005 Declan DePaor, ScienceProf.com
		The polarity of Earth's magnetic field reverses with time. The main figure demonstrates how sea-floor anomalies, also known as magnetic stripes, develop during sea-floor spreading. The inset image records the reversal of Earth's dipole.

	Sea Floor Spreading Animation 4/22/2005 Declan DePaor, ScienceProf.com
		This animation shows progressive stages in the opening of the Atlantic Ocean. The youngest rocks (in red) clearly outline the mid-ocean ridge system, complete with transform faults. The oldest ocean crust (in blue), is confined to offshore regions adjacent to the United States, Canada and western Africa. This distribution demonstrates that the North Atlantic began to open before the South Atlantic.