has part melting water flow process freezing of water into water ice thawing process frost action process 2019-06-24T17:43:00Z Frost action in soils describes the processes of Frost Heave that occurs in the ground during the freezing period, and Thaw Weakening that occurs as the seasonally Frozen Ground thaws. Although it normally refers to seasonal freezing and thawing processes and effects, the term Frost action has also been used to describe the long-term heaving that occurs when soils are subjected continuously to a freezing temperature over a long period of time (years). Frost action contributes to the mechanical weathering (disintegration or breakdown) of soil and rock materials, by frost wedging, Cryoturbation activity, and to the development of cryotexture and cryogenic fabric in soils. A material transport process during which alternate freezing and thawing of moisture in soil, rock and other materials results modifications of those materials and in the formation of structures on, or in, the ground.