THE CONCEPT OF GELIC MATERIALS IN THE NEW GELISOL ORDER FOR PERMAFROST-AFFECTED SOILS

By taxonomic definition, soils in the recently adopted Gelisol order in Soil Taxonomy must contain permafrost within 100 cm of the soil surface or gelic materials within 100 cm of the surface and permafrost within 200 cm of the surface. Five pedons representative of Gelisols are used to illustrate t