No different aspect. I dropped in down the North face, which is a bit shadier. The adjacent mountain had slides on the South face. I can only guess that it was one of those wet sludgy slides. It didn't look like a dry slab, at least from where I was standing.
I'm guessing that it looks like there was a small trigger, maybe single point, just along that run of trees and it then flowed down into that gully.