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According to PIA03799 the volcano rises more than 20 kilometre above the surrounding plains; the wikipedia article states 9 kilometre (as well as PIA02337; PIA04294 gives 10 km) and the infobox gives 16 km (elevation above Martian datum?). PIA03948 gives a height of 19.31 kilometre (converted from 12 miles; does not state what the height is measured against, another datum value?). --Harald KhanՃ 11:29, 1 May 2008 (UTC)
Now that the values are assembled, it suddenly became much easier to compare them...I guess that the PIA03799-source meant datum, while the other soures are referring to the elevation above the surrounding plains; but I don't know. --Harald KhanՃ 11:32, 1 May 2008 (UTC)
It's still a mess. Some statistics are listed with imperial measures first, others with metric, and they still seem inconsistent. Also, it's the second biggest volcano in volume - in the universe? The solar system? On Mars? What's it being compared to? Jakaloke (talk) 19:44, 18 September 2011 (UTC)