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In this artist's concept, an astronaut collects Mars rock samples on the largest shield volcano in the solar system.
02.01.1995

Scaling a Volcano

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 understand beter 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.

Image Credit: NASA/Pat Rawlings

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