patterned ground


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patterned ground

[′pad·ərnd ′grau̇nd]
(geology)
Any of several well-defined, generally symmetrical forms, such as circles, polygons, and steps, that are characteristic of surficial material subject to intensive frost action.
References in periodicals archive ?
Patterned ground occurs wherever rainfall is low (50-700 mm) and has been found on every continent (Valentin et al.
The vegetation analysis and soil surface mapping determined that the patterned ground is characterised by eight different vegetation units ranging from completely bare stony ground to that dominated by A.
rock glaciers, scree slopes, patterned ground, earth hummocks, debris cones, solifluction lobes and solifluction terraces.
In the alpine area of the Southern Carpathians, the alpine geomorphological landscape is dominated by glacial landforms (glacial cirques, throughs, moraines, erratics and roches moutone) and periglacial features (rockglaciers, talus cones and scree slopes, block fields, rock streams, cryoplanation terraces, patterned ground, solifluction forms etc.
If it has held steady for the past 15 million years, as many think, the evidence might be inscribed in the patterned ground.
Back at Mount Morning, now entering a dark and bitter winter, the patterned ground is still buckling, and the wind is still scraping away at the mountain.
Patterned Ground as Evidence of Extensive Permafrost in the Saginaw Lowlands, Michigan, During the Late Pleistocene, Randal
Images taken by the Mars Global Surveyor, now orbiting the Red Planet, suggest that most areas with geological features known as patterned ground appear at high latitudes, the same regions where large quantities of ice may lie just under the planet's surface.
Though evaporation was given a nod in the article, it too can be a significant force to form patterned ground.
Although such simulations do a good job of reproducing Earth's variety of patterned ground, one of them may also go much farther: It could explain the hundreds of patterned regions that spacecraft have spied on the surface of Mars.
Sorted circles are just one example of a large class of natural surface designs called patterned ground.