We were working our way down the ridge that runs North from Little Water Peak in Millcreek. Partly cloudy, temps in the 20's, gusty ridge top winds from the Northwest. Released a hard slab slide on a 32 to 34 degree slope as I skied across a small but wind crusted cornice. The slide broke out about 200 feet wide and ran about 500 feet with a 12 inch fracture. I did not take a ride as the slide broke just below my skis as I was going across the slope. The snow cracked below my skis It appears that the wind crusted cornice I skied across was probably from yesterday and last nights winds. I wasn't necessarily ski cutting the slope but I was staying away from the main slope so I could check it out since it was difficult to see from above.