The American Geological Institute's "Image Bank" has over 6,600 geology images online (http://www.earthscienceworld.org/images/) that can be searched by subject and freely downloaded for use in talks and presentations. There are outstanding Arizona images in the bank, including the one shown here.
AGI's new Executive Director, Pat Leahy, briefed us at the State Geologist's annual meeting, on this and the upcoming geology documentary that will be shown on the Discovery Channel this fall.
[right: Arizona's SP Crater downloaded from the AGI Image Bank, @ Michael Collier]