Point-Release Avalanches

Multiple Choice

Point-release avalanches

A) occur at the heads of valleys and widen as they travel down-valley.
B) occur when several small avalanches from different points converge into a larger avalanche.
C) begin with a small avalanche of snow, which causes adjacent failures as it moves downslope.
D) begin when icy slabs fall off steep cliffs and pick up more snow as they travel downslope.
E) erode the snow away to the rock underneath, leaving V-shaped snow valleys.