- ice wedge polygon
- Patterned ground in areas of ice wedges. These polygons are commonly in poorly drained areas and may be high-centered or low-centered.NRC
Glossary of landform and geologic terms. 2013.
Glossary of landform and geologic terms. 2013.
polygon — A type of patterned ground consisting of a closed, roughly equidimensional figure bounded by more or less straight sides; some sides may be irregular. Refer to patterned ground. Compare: high center polygon, low center polygon, ice wedge… … Glossary of landform and geologic terms
patterned ground — A general term for any ground surface exhibiting a discernibly ordered, more or less symmetrical, morphological pattern of ground and, where present, vegetation. Patterned ground is characteristic of, but not confined to, permafrost regions or … Glossary of landform and geologic terms
Green Valley (Mars) — MarsGeo Valley caption=HiRISE image of a patch of land in the Green Valley region showing scattered small boulders and a polygonal fracture pattern. name=Green Valley latitude=68.35 N or S=N longitude=233 E or W=E length= naming=Informal name… … Wikipedia
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South America — South American. a continent in the S part of the Western Hemisphere. 271,000,000; ab. 6,900,000 sq. mi. (17,871,000 sq. km). * * * Continent, Western Hemisphere. The world s fourth largest continent, it is bounded by the Caribbean Sea to the… … Universalium