Re: Snow Algae?
Here's an image of "snow spots" from a while back.
Note the very thick layer of light-colored material on the upper surface. Is it snow? Dust? What?
I wonder if there is a way to remotely study the composition of the dark material found here and elsewhere on the Martian surface.
I remember at one point someone at JPL was suggesting it was garnet sand. Have you ever seen garnet sand? It is very pale pink, not dark at all.
Cheers, BFelix