Millions, but I don't believe they just disappear. We still find ancient sea bed hundreds of millions of years old here on earth, where we have much stronger erosion due to still having water and a thicker atmosphere.
I could see it being buried by sediment over millions-billions of years. Just dust blown in over such a long period of time, from wind of meteor strikes elsewhere on the surface.
I dunno, all the photos look to me like it's just a giant dried up ocean. Without beaches or rivers or things you'd expect from a landed area that just became desert-like. It seems like floods destroyed the planet and then sand, dust storms, and meteors over time.
Oh I agree that a fair part of the planet does look like oceans and dried up floodplains. I don't think that floods destroyed the planet just that a large portion was covered with oceans.
We just don't find minerals that would form in such an environment, so I was sort of spit balling as to why that might be. Like some features look almost soft or understated as if they have a shallow layer covering them
maybe not water. There are many MANY other liquids. Perhaps blood? Or Mayo?
Perhaps hydrogen peroxide and it just cleaned it’s surface really really well as it evaporated away…
5
u/[deleted] Oct 08 '22
Other comments have talked about the lack of minerals that would be formed in the presence of water. However that could be buried by regolith, maybe?