re: Layering can be seen in new pictures of Endurance
That rim on the far side of the crater appears to be uplifted by the meteor impact. I'm not a geologist but it would seem that the observations of disturbed layers like the ones we're seeing would not give as accurate results as looking at the side that Opportunity is approaching but can't yet see. I'd think that if there are similar layers in the near wall that they'd more accurately represent the true depths of the deposits.
Can't wait for the first look inside.