Visit Dr. Tanya Atwater's
page at the University of Santa Barbara and click on animations to see
spectacular animations of plate motions in western North America
Check out the following links for digital map sources on the Internet
TerraServer
is a fantastic resource for topographic maps and aerial photos prepared
by a collaboration between the U.S. Geological Survey and Microsoft
Corporation
Topozone is another
excellent site which uses U.S. Geological Survey topographic maps