Re: Floods At Mars' Equator Appear To Be
It seems to me that if there was so much water "recently"- within 10 million years- then there should still be some of it leftover and that this could be detected by Neutron detector flying on Odyssey. I would "guess" that this much quantity of water would be more than enough saturate the entire atmosphere on Mars- so in terms of months, years, or even decades it couldn't simply evaporate.
Whereas with Nick's model you wouldn't have this "problem"- the CO2 would/could evaporate in a very short time period, even before the liquid has chance to pool into lakes