Thanks, SN. The green on the rock is not lichen, but more a result of copper based minerals. The rock was definitely heavier than others around, and parts of it looked like it was pure iron. The Black Kaweah summit is not granite, but a much darker rock.
I believe a few of the mountains in the Sierra are actually more of a metamorphic origin -- islands of rock different in origin than the massive and predominant Sierra granite. Mt Ritter and Banner Peak are similar with the darker rock.
