X1013071948-00238-63867</DOCNO> Geomorphic Action of Wind and Waves aeolus: Greek god of the wind wind is an important geomorphic agent in arid environments and in other smaller areas where fine sediments are exposed to wind, i.e. where surface cover is lacking: beaches , floodplains, deserts , soil disturbed by agriculture Erosional processes and landforms deflation entrainment of loose sediment deflation hollow ( blowout ) shallow depression produced by deflation often originates from the destruction of vegetation (e.g. fire, recreational use of dunes) abrasion (sand blasting) impact of entrained sand grains against rock surfaces and other grains yardangs wind abraded ridges oriented with the prevailing winds and separated by abraded chutes that conduct windblown sand Eolian sediment transport suspension dust (silt and clay) held in suspension by turbulent eddies saltation transport of sand grains in long (1 m or more) low (within 1-2 m of the ground) paths as momentum is passed from grain to grain grains are momentarily suspended but too heavy to remain in suspension most of the transport of dune sand creep (traction) sliding and rolling of coarse sand, pebbles and small boulders dragged along by strong winds similarities and differences with transport by running water larger grains are suspended in water than in air saltation accounts for most sand transport in air, but is much less common in water because sand grains tend to remain in suspension in turbulent water larger particles (gravel) move as bedload (traction) in water air has no dissolved load Depositional landforms ripples small sand waves with a wavelength of about 1 m, i.e .
(shallow depression; produced; by deflation) (abraded ridges; oriented; with the prevailing winds) (yardangs; is; much less common; L:in water; because sand grains tend to remain in suspension in turbulent water larger particles (gravel) move as bedload (traction) in water air) (sand grains; tend; to remain in suspension in turbulent water larger particles (gravel) move as bedload (traction) in water air) (abraded chutes that conduct windblown sand Eolian sediment transport suspension dust (silt and clay); held; L:in suspension; by turbulent eddies) (has no dissolved load Depositional landforms; ripples; small sand waves) (has no dissolved load; landforms; Depositional) (fine sediments; are exposed; to wind; L:other smaller areas) (abraded ridges; separated; by abraded chutes) (surface cover; is lacking; beaches) (sand grains; to remain; in suspension in turbulent water) (yardangs; are suspended; L:in water) (most of the transport of dune sand creep; sliding; ) (soil; disturbed; by agriculture Erosional processes and landforms) (an important geomorphic agent; is Greek god of; the wind wind)
shallow depression abraded ridges yardangs sand grains abraded chutes that conduct windblown sand Eolian sediment transport suspension dust (silt and clay) has no dissolved load Depositional landforms has no dissolved load fine sediments abraded ridges surface cover sand grains yardangs most of the transport of dune sand creep soil an important geomorphic agent
produced oriented is tend held ripples landforms are exposed separated is lacking to remain are suspended sliding disturbed is Greek god of
by deflation
with the prevailing winds
much less common L:in water because sand grains tend to remain in suspension in turbulent water larger particles (gravel) move as bedload (traction) in water air
to remain in suspension in turbulent water larger particles (gravel) move as bedload (traction) in water air
L:in suspension by turbulent eddies
small sand waves
Depositional
to wind L:other smaller areas
by abraded chutes
beaches
in suspension in turbulent water
L:in water
by agriculture Erosional processes and landforms
the wind wind