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  2. Dune - Wikipedia

    en.wikipedia.org/wiki/Dune

    Parabolic dunes, like crescent dunes, occur in areas where very strong winds are mostly unidirectional. Although these dunes are found in areas now characterized by variable wind speeds, the effective winds associated with the growth and migration of both the parabolic and crescent dunes probably are the most consistent in wind direction.

  3. Foredune - Wikipedia

    en.wikipedia.org/wiki/Foredune

    Parabolic dunes are identified by vegetated dune ridges and vegetated deflated plains. Due to variable wind gusts, parabolic dunes are commonly unvegetated in troughs or dune swells where wind tunnels transport currents. Ripple alignment in association with the main dunes can also identify parabolic dunes.

  4. Guadalupe-Nipomo Dunes - Wikipedia

    en.wikipedia.org/wiki/Guadalupe-Nipomo_Dunes

    Parabolic dunes are U-shaped and perpendicular to the shore with vegetative ridges. Moving sand sheets consist of constantly moving sand, making it hard for vegetation to settle. The fore dunes begin at the high tide line, where only low growing plants with deep root systems (such as sand verbena) can live. The strong winds, salt spray, and ...

  5. Inland dune - Wikipedia

    en.wikipedia.org/wiki/Inland_dune

    With the end of the glacial period, the mobility of the dunes quickly came to a halt as a result of reforestation. The shape of inland dunes varies depending on the prevailing wind direction and strength. Most of them are rather irregular dunes or shifting belts of sand. But there are also occur very well-formed parabolic dunes and longitudinal ...

  6. Barchan - Wikipedia

    en.wikipedia.org/wiki/Barchan

    As barchan dunes migrate, smaller dunes outpace larger dunes, catching-up the rear of the larger dune and eventually appear to punch through the large dune to appear on the other side. The process appears superficially similar to waves of light, sound, or water that pass directly through each other, but the detailed mechanism is very different.

  7. Erg (landform) - Wikipedia

    en.wikipedia.org/wiki/Erg_(landform)

    For example, there are ergs or fields of linear dunes, of crescentic dunes, of star dunes, and of parabolic dunes, and these dune arrays tend to have consistent orientations and sizes. [10] [11] By nature, ergs are very active. Smaller dunes form and migrate along the flanks of the larger dunes and sand ridges.

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  9. Aeolian processes - Wikipedia

    en.wikipedia.org/wiki/Aeolian_processes

    Wind erosion of soil at the foot of Chimborazo, Ecuador Rock carved by drifting sand below Fortification Rock in Arizona (Photo by Timothy H. O'Sullivan, USGS, 1871). Aeolian processes, also spelled eolian, [1] pertain to wind activity in the study of geology and weather and specifically to the wind's ability to shape the surface of the Earth (or other planets).