These scripts enable navigation. It requires javascript be enabled in your browser. Human Space Flight WebHuman Space Flight WebHuman Space Flight WebHuman Space Flight WebHuman Space Flight WebHuman Space Flight WebHuman Space Flight WebHuman Space Flight WebHuman Space Flight Web
Skip navigation to content.
Human Space Flight WebReturn to Human Space Flight home page
Human Space Flight Web
Human Space Flight Web


high res (8.6 M) low res (442 K)
S95-01566 (February 1995) --- (Artist's concept of possible exploration programs.) Two kilometers above the lava flows of Mars' Tharsis Bulge region, a geologist collects samples from the eastern cliff at the base of Olympus Mons, the solar system's largest known shield volcano. To better understand the evolution of the Arizona-sized volcano, the scientist investigates the layers of hardened lava that make up the massive feature. The block-like nature of the rock face, caused by columnar jointing, is similar to features on Earth, such as the Devil's Tower in Wyoming. Artwork done for NASA by Pat Rawlings, of SAIC.

Curator: Kim Dismukes | Responsible NASA Official: John Ira Petty | Updated: 01/04/2006
Web Accessibility and Policy Notices