Mars in 3-D: Images from Mars Express
Strange Volcano
A three-dimensional oblique view of the summit caldera of Albor Tholus, a volcano in the Elysium region. The caldera has a diameter of 30 km and a depth of 3 km. The volcano as a whole has a diameter of 160 km and a height of 4.5 km. The depth of the caldera approaches the height of the volcano, which is unusual on Earth. Click to enlarge.
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