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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). Winds may erode , transport, and deposit materials and are effective agents in regions with sparse vegetation , a lack of soil moisture and a large ...
Aeolian landforms, or Eolian landforms, are produced by either the erosive or depositive action of wind. These features may be built up from sand or snow , [ 1 ] or eroded into rock, snow, or ice. Aeolian landforms are commonly observed in sandy deserts and on frozen lakes or sea ice and have been observed and studied around Earth and on other ...
In coastal aeolian sands that consist of large amounts of calcium (derived from marine shells), the movement of water to the roots would drive the flow of calcium to the root surface. This calcium accumulates at high concentrations around the roots and over time is converted into a calcrete.
Cross-bedding in lithified aeolian sand dunes preserved as sandstone in Zion National Park, Utah. A lithified (consolidated) sand dune is a type of sandstone that is formed when a marine or aeolian sand dune becomes compacted and hardened. Once in this form, water passing through the rock can carry and deposit minerals, which can alter the ...
Strictly speaking, an erg is defined as a desert area that contains more than 125 km 2 (48 sq mi) of aeolian or wind-blown sand [3] and where sand covers more than 20% of the surface. [2] Smaller areas are known as "dune fields". [4]
The Warkworth Sands Woodland occurs on aeolian sand deposits south of Singleton in the Hunter Valley. [1] These sand dunes are thought to date from the Pleistocene, are from 1–6 m high and rest on a river terrace. [2] Under the Commonwealth EPBC Act it is listed as Warkworth Sands Woodland of the Hunter Valley. [4]
The Great Victoria Desert The Great Victoria Desert is an arid active sand-ridge desert of deep Quaternary aeolian sands overlying Permian and Mesozoic strata of the Officer Basin. Between sand-dune ridges there is a tree steppe of Eucalyptus gongylocarpa , Mulga and Eucalyptus youngiana over hummock grassland dominated by Triodia basedowii .
Aeolian sands have climbed onto many of the western slopes of the Sierra Pinacate, defining the eastern limit of the dune field. To the north, the sands thin out against the distal margins of alluvial fans from the Tinajas Altas and Tule Mountains along the Arizona–Sonora border. The southern border of the sand sea is the northern shore of ...