Mars: Olympus Mons and caldera close-up 7.10
Click image to return to colour image of Olympus Mons
Left: 800 km wide view showing Olympus Mons, which rises 24 km above its base and is the largest volcano in the Solar System.

Right: Enlarged view of the 90 km wide complex of overlapping calderas at the summit. These calderas are volcanic craters, formed by subsidence in response to the eruption of lava.
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Image Credit: NASA