Soils of very cold climates that contain permafrost within 2 meters of the surface.
Patterned Ground, Alaska
West of Prudhoe Bay, polygons are 3-7 meters in diameter.
Freeze/thaw in upper portions of soil along with frost heaving and ice wedge formation create a ridge on the edges of the polygons and a center depression.
Gelisol Landscape - Polygonal Cracks
Gelisol - North Coastal Tundra of Alaska
Permafrost at 38cm (15 inches). Limited
Forms when permafrost melts.
Typically occurs after removal of
vegetation that removes