In reply to Jamie Hageman:
OK, the snow on the left but not the right suggests that corrie faces somewhere from NW to E, which probably rules out a few places (including my last guess, right enough).
You probably wouldn't be posting this if it wasn't a little bit surprising, so it's maybe an unusual route on a hill which is normally less interesting.
The rock is hard to be sure about, but I'm pretty confident it isn't one of the sedimentary rocks of the far NW, or a basic igneous rock (pretty much ruling out the islands).
I still don't know, though.