that seems like a pretty good link
the page makes interesting points like
Gusev resembling dried-up lake-beds on earth
wind having swept dust off rock---convenience
the question of whether there are carbonate rocks (which wd suggest former water)
there have been a bunch of
Spirit links at PF over the past 24 hours but this
was the first that made entire sense to me.
thanks for posting the link.
Separate names with a comma.