For 10 points, name this type of mass wasting, in which concentration of water in the surface areas of periglacial environments leads to downslope flow in permafrost.
A similarity law for this process was one result of the Higashi and Corte experiment. The velocity profile of a deposit of this type is given by the product of the constant gamma, acceleration due to gravity, the sine of the slope angle, vertical distance and the exponential of negative k times vertical distance, all divided by apparent viscosity. Jeffery's Theory describes the motion of particles during this process. (*) Nearly vertical particle cohesion consolidation may induce one of its retrograde versions. Its most common form is a plastic deformation process constrained by segregation layers involving pore-pressure induced shearing. In aerial view, evidence of it includes ploughing erratics or a series of interconnected turf-banked lobes or terraces commonly forming a half-crown structure around hillocks or drumlins. For 10 points, name this type of mass wasting, in which concentration of water in the surface areas of periglacial environments leads to downslope flow in permafrost.
A similarity law for this process was one result of the Higashi and Corte experiment.
{gelifluction} [or {solifluction}; prompt on “{frost creep}” or similar until "{plastic deformation}"]