Finally got 'round to some color combining, thanks Robert, et. al. for the tips.

I'm still trying to figure out out what jpl is calling this area (is it “Shoemaker’s Patio,”?), but I've called it the polygons.

I used the formula (IR+R)+O; G; CY+V, on the raws from sol 50.

I've mentioned the polygonal joints on the upper bedding surfaces before, but this is the best example I've seen yet.

A Couple o' Thoughts:

To the upper left the layers (bedding) is inclined away from the viewer. To the lower right the layers are being viewed from directly above ("normal to bedding"). They appear to be in conformable contact. Top view of truncated crossbedding?

The area is broken into many blocks that are displaced and/or rotated. The fractures between these blocks rarely meet at an orthagonal (90 degree) angle. Usually it is a triple junction. Are these purely the result of impact fracturing or is there some more primary jointing to this area?

Within the blocks, there is a polygonal fracture pattern that shows no displacement. They also appear to arc. These minor stuctures appear to predate the larger set, as the smaller set is offset by the major set in several areas. (at least, the minor set precedes the displacement of the major set.) Are the major and minor sets related?

Furthermore, the minor set of fractures do not always continue into the upper layers that dip off to the upper left.

Typically, polygonal fractures form from contractional stress- cooling or shrinkage. Need to review impact fracture patterns (usually ring or radial, no?)

I keep seeing an aeolean sulfate rich sediment that was wet, drying out, getting covered by more sediment, getting wet again, dunes forming, scouring off the lower set of crossbeds, getting wet again, desicating and cracking....

A Sabka, like Nick said. But the sulfate +/- iron sediments had to come from somewhere.....

There's another of those blocky "blue" rocks here, and this one is really reflecting the ultraviolet end of the spectrum. Check out the raw L7 filter, see how bright it is? Not heard any talk 'bout them, at all. (at least not till Nick's most recent post)

Oh, the L2 and the R2 images make pretty good stereo pairs.