Here's the thing about mars: it is different from earth
Expect to see things you don't see here (and vice versa). Look for earth-analogs, but don't expect them to match exactly. Let's get the MI on that stuff and do a few spectrographs.
PS: I don't believe that you have done your 25 lb. talcum powder experiment. I can't imagine why you would claim to know its outcome.
