On 2/4, traveled in the Silver Star Creek area. Firm wind affected snow above 6k' and very difficult skiing below 4500' (breakable crust over rain-saturated snow). Moderate SW winds with stronger gusts.
At 5400' NW aspect, HS 235cm, shallow 5cm wind slab surface, and both of the layers of concern were present in the pack.
The buried SH was 27cm down and gave sudden planar results (CT-12 SP), but ECT-N in this area.
The crust-facet interface was 52cm down and was more stubborn in compression tests (ECTN28), but did indicate propagation in a propagation saw test: PST 25/100 (END) down 52cm
There was another less obvious layer just above the crust-facet interface (45cm down) which only showed a subtle density change. CT-M/ECT-N