Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible - Likely
- Size
- 1.5–3
Two problematic layers of surface hoar, facets, and/or melt-freeze crust are buried 40 to 120 cm deep. Humans continue to trigger large avalanches on these layers each day, primarily between 1600 m and 2200 m and on all aspects.