frozen ground or permafrost

free water

free water is that portion of the pore water that is free to move between interconnected pores under the influence of gravity.
Free water at the base of Dirt Glacier, British Columbia, in 1904. (Photo courtesy of C.W. Wright. Archived at the World Data Center for Glaciology, Boulder, CO.)

fragmoidal cryogenic fabric

a distinct soil micromorphology, resulting from the effects of freezing and thawing processes, in which soil particles form discrete units that are coalescing.

fragmic cryogenic fabric

a distinct soil micromorphology, resulting from the effects of freezing and thawing processes, in which soil particles form discrete units that are densely packed.

foundation pile

structure used when the soil near the ground surface is not strong and the weight of the building must be carried by deeper soil layers.

fabric

soil micromorphology.

extensive discontinuous permafrost

(1) (North American usage) permafrost underlying 65 - 90% of the area of exposed land surface (2) (Russian usage) permafrost underlying 70 - 80% of the area of exposed land surface.

excess ice

the volume of ice in the ground which exceeds the total pore volume that the ground would have under natural unfrozen conditions.

equilibrium permafrost

permafrost that is in thermal equilibrium with the existing mean annual surface or sea-bottom temperature and with the geothermal heat flux.

epigenetic permafrost

permafrost that formed through lowering of the permafrost base in previously deposited sediment or other earth material.

epigenetic ice wedge

an ice wedge developed in epigenetic permafrost, or in previously formed syngenetic permafrost.

Pages

Subscribe to RSS - frozen ground or permafrost