This list below is our attempt at cataloging open-access books for geology courses.
Physical Geology
 | Physical Geology by Karla Panchuk This text builds upon the work of Steven Earle (see below) with a number of improvements on imagery. |
 | An Introduction to Physical Geology by Chris Johnson, Matthew D. Affolter, Paul Inkenbrandt, and Cam Mosher An OER textbook for introductory geology developed by a team at Salt Lake Community College |
 | Physical Geology 2nd Edition by Steven Earle An OER textbook for introductory geology developed by faculty from Earth science departments at universities and colleges across British Columbia and elsewhere. |
OER Geology 