On the South Rim of the Grand Canyon, ASU geology professor Philip Christensen briefs the students on points where the geology of Arizona's Grand Canyon parallels that of Mars' Grand Canyon, Valles Marineris.
See thumbnails of this
Arizona Board of Regents
For information on use of photos, please e-mail
Office of Public Affairs
300 E. University Drive, Suite 345
PO Box 877305
Tempe, AZ 85287-7305