I've reviewed some forum postings and I tried to put together a likely sequence of sulfide mineralization and alteration at Meridiani. I posted it on my site below, so if there are any geochemists out there, please don't hesitate to comment so that I can refine the sequence.

I also described and put up some cool stereo photos of mudcracks and those weird razorback rock hedges that Opportunity found inside endurance crater. So check it out.

Cheers,
Aldo.