solifluction

definition: 
The gradual movement of wet soil or other material down a slope, especially where frozen subsoil acts as a barrier to the percolation of water.
sentence: 
In contrast to the soil creep of temperate regions, solifluction and gelifiuction are relatively rapid processes in periglacial regions and can result in the active development of slopes.
difficulty: 
medium
toefl frequency: 
1
toefl classification: