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... > Science Keywords > EARTH SCIENCE > LAND SURFACE > GEOMORPHIC LANDFORMS/PROCESSES > AEOLIAN LANDFORMS > DUNES > STAR DUNE

TERME PRÉFÉRENTIEL

STAR DUNE  

DÉFINITION

  • Radially symmetrical, star dunes are pyramidal sand mounds with slipfaces on three or more arms that radiate from the high center of the mound. They tend to accumulate in areas with multidirectional wind regimes. Star dunes grow upward rather than laterally. They dominate the Grand Erg Oriental of the Sahara. In other deserts, they occur around the margins of the sand seas, particularly near topographic barriers. In the southeast Badain Jaran Desert of China, the star dunes are up to 500 metres tall and may be the tallest dunes on Earth.

CONCEPT GÉNÉRIQUE

NOTE DE CHANGEMENT

  • 2013-08-05 14:07:00.0 [tbs1979] Insert Concept add broader relation (STAR DUNE [dc9dea65-e574-4bbb-9945-cd6d1cdbf6c1,105429] - DUNES [416221ec-04e1-4913-aacb-9045551949c4,105421]);
  • 2013-08-16 14:44:32.0 [tbs1979] insert Definition (id: null text: Radially symmetrical, star dunes are pyramidal sand mounds with slipfaces on three or more arms that radiate from the high center of the mound. They tend to accumulate in areas with multidirectional wind regimes. Star dunes grow upward rather than laterally. They dominate the Grand Erg Oriental of the Sahara. In other deserts, they occur around the margins of the sand seas, particularly near topographic barriers. In the southeast Badain Jaran Desert of China, the star dunes are up to 500 metres tall and may be the tallest dunes on Earth. language code: en);

URI

https://gcmd.earthdata.nasa.gov/kms/concept/dc9dea65-e574-4bbb-9945-cd6d1cdbf6c1

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