If the ancient Martian ocean water covered the entire surface uniformly, what was the approximate depth?

Answer

560 meters (about 1,800 feet)

If that ancient water had covered the entire Martian surface to a uniform depth, it would have been roughly 560 meters (about 1,800 feet) deep across the planet.

If the ancient Martian ocean water covered the entire surface uniformly, what was the approximate depth?

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