Didn't get a chance to get to any of the Fracture lines but did found this pit on the slope outside the Guard (somewhat representative) with the layer we think is the culprit - SH over crust. ECTP6 (x2). (A Naisbitt)
Ran below choke onto the aprons. Pulled out smaller pockets along the way.
Photo: Kobernik
Skier update: 
A Naisbitt photo
Adam Naisbitt photo