ground ice


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ground ice

[′grau̇nd ‚īs]
(hydrology)
A body of clear ice in frozen ground, most commonly found in more or less permanently frozen ground (permafrost), and may be of sufficient age to be termed fossil ice. Also known as stone ice; subsoil ice; subterranean ice; underground ice.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Lode ice is a kind of ground ice. It forms when water fills cracks in rocks and unconsolidated permafrost rocks.
Sunlight reflects off ice sheets, but the darker, dirtier ground ice absorbs sunlight leading to faster melting.
Other features on Mars hint at near-surface ground ice. Glacial landforms such as moraines and pingos dot both northern and southern landscapes.
The numerical model implies that where fine-grained, unconsolidated sedimentary deposits existed on top of an icy permafrost layer, melting of ground ice and the development of subsurface aquifers could have taken place at shallow depths.
Ground ice was forming during the first week in September and everyone was getting their last supplies of the year in by sea-lift.
The plumes were detected over locales that show either evidence of ancient ground ice or the flow of liquid water, including the Nili Fossae region, an area east of Arabia Terra and the southeast quadrant of an ancient volcano called Syrtis Major.
The three regions releasing gas also showed evidence of ancient ground ice or flowing water.
The flood of images sent back by Phoenix revealed a landscape similar to what can be found in Earth's permafrost regions - geometric patterns in the soil likely related to the freezing and thawing of ground ice.
The flood of images sent back by Phoenix revealed a landscape similar to what can be found in Earth's permafrost regions - geometric patterns in the soil likely related to the freezing and thawing of ground ice. "This is a scientist's dream, right here on this landing site," principal investigator Peter Smith said.
Rosemount Aerospace in Burnsville, Minn., is in the final stages of developing its own system to detect ground ice formation.
"There is shallow ground ice under roughly a third of the Martian surface, which records the recent history of Mars," said the study's lead author, Colin Dundas of the U.S.
But 1970-81 provided Ross's classical treatment of disturbance to permafrost terrain (1970); segregation as the origin of massive ice (1971); preservation of permafrost and ground ice beneath the Laurentide ice sheet (1972); the origin of offshore permafrost (1972); the development of pingos from pore-water expulsion (1973); the influence of snow cover on ground temperatures (1974); the characteristics of thermal contraction cracking (1974); experimental demonstration of pingo growth (1977); identification of an early-Holocene thaw unconformity (1978); the origin of hummocks (1980); and plug-like flow in solifluction (1981).