Community Geology Resources from GCC Geology Program
Tutorial on Geologic Time, Structures, and Geologic Maps (need new link) from GCC Geology Program
Open Geology Textbook from Salt Lake Community College
Tarbuck & Lutgens 8th Edition open on-line study guide. Source of practice quiz/exam material
Earth Revealed Videos from the Annenberg CPB foundation. Works best using Google Chrome or Firefox browsers. Excellent instructional videos.