Click on the links below to view animations created specifically for Earth: Portrait of a Planet.
Animations require Macromedia's Flash Plug-in.

Oil Formation and Trapping

This animation shows the successive stages in the formation of an oil reserve. In View 1, organic material settles, is buried, and is transformed by heat and pressure into oil. In View 2 an oil trap is formed: the area folds into an anticline, and oil migrates and accumulates in the anticline crest.

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.

These links are selected carefully and updated regularly; however, their contents may change over time. Please click here to report a bad or missing link.

» Search for specific topics » Browse the Link Library

	Migration of Magmatism over the Last 65 m.y. 2/10/2005 The Western North American Volcanic and Intrusive Rock Database
		This map shows the location of volcanic activity as a function of time for the Cenozoic. Each red dot represents a radiometrically dated eruption. Note how the locus of volcanic activity changes through time.