I'm sorry, but Mars always turns out to be quite different than even the smartest among us believe it to be.

Glaciers in Ophir and Candor? Sure, why not? Except that the minute we say "glacier" an image of something crumbling along ponderously in the arctic or some high mountain range, or something disappearing though melt and evaporation in the relentless global warming of the Earth is conjured up. Most of all, something cold and wet is thought of.

On Mars, there are or no doubt have been glaciers through the ages, but are they anything like glaciers on Earth?

In the context of the Martian environment, couldn't any glaciers actually be warm and dry rather than cold and wet?

And what of their composition? Pure water ice is unlikely, though not impossible. What aqueous solutions would form ices? And how would they behave if consolidated into glaciers?

Further, how would glaciers form? From snowfall? Or could they form at the surface from fluids released from below? Would such glaciers behave any differently?

If there is convincing evidence of recent glacial action in Candor and Ophir, how did the glaciers get there? Were they only in these canyons? If so, why? If not, where else might they have formed?

So many questions...!

Cheers, BRFelix