Yellowstone-Like Supervolcanoes on Mars Suggest Huge Explosions
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Early Mars was an explosive, fiery place, much like early Earth, with supervolcanoes that could eject at least 240 cubic miles (1,000 cubic kilometers) of molten rock.
Drawing on images and data from the Mars Express and Global Surveyor spacecrafts, scientists identified irregular craters in an upland region in northern Mars, called Arabia Terra, that were formed through massive explosions and subsequent collapses. Those structures are remnants of supervolcanoes, much like the one at Yellowstone National Park which has erupted multiple times in the last 18 million years, according to a paper in the journal Nature.