Don't have too much info on this but thought I'd drop the photo in. Likely human caused cornice drop in upper days. Went over a skinner, or perhaps the skinner was put in after. Doesn't look like the cornice fall stepped into any lower/ weaker layers, but it did entrain a fair amount of snow; enough to knock a person off their feet. and, it broke into a Lee slope so could have potentially gone bigger.

keep an eye out for these as we head deeper into spring!