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The Hawaiian islands result from the northwesterly movement of the Pacific plate over a stationary hotspot producing lava. As the plate moves over the hotspot, new volcanoes are formed and the existing ones become extinct. This distributes the total volume of lava among many volcanoes rather than one large volcano.
On Mars, the crust remains stationary and the lava piles up in one, very large volcano. Mars Atlas. Olympus Mons compared to Arizona. Shield volcanoes like Olympus Mons are formed as lava slowly flows out of the ground and spreads out, creating a low, squat appearance. Scientists posit that Olympus Mons is still a fairly young volcano from a geologic standpoint, estimating it to be only a few million years old.
This means that Olympus Mons, which is already the size of France, could get even bigger as fresh lava flows to the surface and cools. Mars will also be at its closest point to Earth in its orbit during opposition, making it appear bigger and brighter in the sky. Members Educators Researchers. Search for: Submit Search.
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