Haploturbel
A soil profile of a Haploturbel in Alaska. Involutions of soil material (brown) are mixed into the underlying soil by cryoturbation. (Soil Survey Staff. 2015. Illustrated guide to Soil Taxonomy. U.S. Department of Agriculture, Natural Resources Conservation Service, National Soil Survey Center, Lincoln, Nebraska)
Haploturbels have an ochric (typically thin and/or light-colored) epipedon and have sufficient moisture for cryoturbation. Commonly, the cryoturbation is not well expressed. These soils occur in Alaska, Canada, and Siberia.
Turbels are the Gelisols that have one or more horizons with evidence of cryoturbation (intense frost churning) in the form of irregular, broken, or distorted horizon boundaries; involutions; the accumulation of organic matter on top of the permafrost; ice or sand wedges; or oriented rock fragments. Cryoturbation occurs only in soils that have sufficient moisture for the formation of ice crystals. Soils that have cryoturbated horizons and are dry for most of the year were probably moister in the past. Turbels are the dominant suborder of Gelisols. They account for about half of the Gelisols worldwide. These soils are common in the High and Middle Arctic Vegetation Regions of North America and Eurasia, at latitudes of 65 degrees north or more.
For additional information about soil classification, visit:
www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/survey/cla...
Haploturbel
A soil profile of a Haploturbel in Alaska. Involutions of soil material (brown) are mixed into the underlying soil by cryoturbation. (Soil Survey Staff. 2015. Illustrated guide to Soil Taxonomy. U.S. Department of Agriculture, Natural Resources Conservation Service, National Soil Survey Center, Lincoln, Nebraska)
Haploturbels have an ochric (typically thin and/or light-colored) epipedon and have sufficient moisture for cryoturbation. Commonly, the cryoturbation is not well expressed. These soils occur in Alaska, Canada, and Siberia.
Turbels are the Gelisols that have one or more horizons with evidence of cryoturbation (intense frost churning) in the form of irregular, broken, or distorted horizon boundaries; involutions; the accumulation of organic matter on top of the permafrost; ice or sand wedges; or oriented rock fragments. Cryoturbation occurs only in soils that have sufficient moisture for the formation of ice crystals. Soils that have cryoturbated horizons and are dry for most of the year were probably moister in the past. Turbels are the dominant suborder of Gelisols. They account for about half of the Gelisols worldwide. These soils are common in the High and Middle Arctic Vegetation Regions of North America and Eurasia, at latitudes of 65 degrees north or more.
For additional information about soil classification, visit:
www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/survey/cla...