Thanks for the high-rez pics.

So far, I don't see anything that I am convinced is an in-situ outcrop. The horizontal "shelf" that lines the far edge of the crater might be outcrop, or it might just be the edge of the crater verses the 'pavement" of the terraine outside the crater.

The dark area below this could be material slumping down the interior crater wall along impact ring fractures. It should be looked at during the circumnavigation of the crater.

The dark material in the bottom of the crater could be a small crater, or it could be a lag deposit of heavier mineral grains.

Unfortunately, the second pic wasn't coming through.

If this were on a traverse I was walking, I don't think I'd spend a great amount of time here. I'd walk 'round it, check out the blocky area on the far side, then head for the hills. I might trench and sample the soil inside the crater, but then again, I might not.

So far, everything I see in Gusev is mafic igneous rock.