Ground water is WAY worse than air!! In air, what works against you is predominantly Oxygen. With water, you not only have O2, but also, the either acidic or alkaline compounds, that are naturally found in the ground!!
One of the things that have preserved some, if not most, of the ancient artifacts that have been found, has been that they were either in very deep water, encased in ice in a perpetually frozen area or at an extreme altitude (sometimes also encased in ice) or in a perpetually arid area.
Extreme oceanic/lake/H2O depth and extreme altitude basically are the same, O2 is so compressed or dissipated that it's ability to react with the surfaces are inhibited!!
Later
Martin
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Martin sends.
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