Slope movements in this area are smaller and have shallower rupture surfaces than those along the Cheslatta River. Two complex rotational-earthflow landslides were discovered along a portion of the Cheslatta River that extends from a spillway at Ootsa Lake to Cheslatta Lake. Longitudinal profiles and detailed field observations were recorded at both slope movements. Both have amphitheatre shaped main scarps, some backward-tilted slump blocks, and earthflows and slickenside surfaces at their base. A small sag pond was also found at slump 2.
Several factors are responsible for translational slope movements.
Wherever the dominant sediment type is till, competent shoreline bluffs and river banks occur. Conversely, unstable areas seem to be associated, at least partly, with clay-rich glaciolacustrine material. Crescent and comma shaped erosional depressions wrap around these forms and are often filled with bogs or standing water. They often combine to form large troughs oriented transverse to subglacial flow. It is concluded that these depressions are formed by subglacial meltwater floods.