No...seriously I would say that the variance in color is due to varying times of seepages.

In other words, the fresher seeps are darker and the older ones are either freezing, evaporating or absorbing and getting lighter.

If miss England can use some of her custom software to locate images of locations imaged over twice - and include those that were imaged three or four times it would be interesting to see if the theory holds water. ;-)

It should, hopefully, be possible to see at least one seep fading.

Historically, Mars has changed color dramatically - and although our telescopes from even fifty years ago are nothing compared to the MGS imagery, I think it is safe to assume that fifty years ago these seepages might have been larger and acted as a catalyst to some form of liechen or similar organism which gave such a greenish hue to the planet.

Or...

...these seepages, if much larger, might have frozen and distorted the color perceived of much of the surface.

All of this is a lot of speculation though.

It is a good paper and a fine start. I commend everyone involved. However the official take on things is always hard to overturn. Mute evidence, can be observed when one knows that millions of kids are at this time being taught that our universe can emerge from a primordial blob of 'nothing'.

Best wishes,

SDAI-Tech1