Blowout Dune and Hollow
The blowout is a saucer cup- or trough-shaped hollow formed by wind erosion on a preexisting sand deposit. Accumulation of sand is derived from the depression (Cholnoky 1902). The blowout dune is the circular rim of the aeolian depression. It may extend downwind and may form a parabolic dune when stabilized by vegetation on Earth.
Blowout dunes typically have a high ratio of depositional lobe length and deflation basin length. Hollow width is frequently correlated with the depositional lobe length (trough blowouts have a ratio of 1:4, saucer...
KeywordsWind Erosion Leeward Slope Water Table Position Basin Length Sand Supply
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