Avalanche education field day for Mazamas Backcountry ski touring class. Class dug pits at 4600 ft on West facing feature near South Fork mineral creek. 30 cm Pencil crust over 4F wet meltforms down to bottom of pit 120 cm. CTN, ECTP13 Q2 at rain crust wet snow interface. Appears to be weakly bonded rounding snow that is still wet from the rain events at the interface with the rain crust where it has frozen. No other signs of instability from warming.