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The long axes of these dunes extend in the resultant direction of sand movement. " ... sand mounds with slipfaces on three or more arms that radiate from the high ... elongate parallel to the pr...

10(ah) Eolian Processes and Landforms - Physical Geography


Wind can also cause erosion and deposition in environments where ... Sand dunes are the most noticeable landforms produced by wind erosion ... dune whose long axis is transverse to the dominant wind direction. ... Barchanoid Ridge, Is a long, asymmetrical dune that runs at right angles to the prevailing wind direction.

Deserts and eolian processes


On a day to day basis, eolian (wind dominated) transport and deposition predominates. ... occur in groups that are oriented toward the direction of the prevailing wind. ... Dunes tend to form in topographic pockets where the sand is confined. ... long straight ridges more or less parallel to the wind; moderate to low sand supply ....

Ch. 14, 15, 16 Exam 4 - Geology 1403 with Cook at Tarrant County ...


Apr 11, 2013 ... ____ dunes are long, high, sand dunes parallel with the prevailing wind ... linear sand ridges at right angles to the prevailing wind direction.

Shuttle radar images of wind streaks in the Altiplano, Bolivia


parallel to the prevailing winds. The streaks form ... and are as much as 15 km long and 800 m wide. Dark streaks ... are covered by numerous 0.5—2-m-high coppice dunes, and in radar- ... geology of the Altiplano is dominated by sand dunes, sand sheets, allu- ... same general direction as the Cerro Quishuara streaks.

Unit 49 | Higher Education | Oxford University Press Canada


Aggradational landforms include sand dunes and loess. ... dune, A long ridge- like sand dune that lies parallel to the prevailing wind. ... yardangs are low ridges that form parallel to wind direction, due to abrasion. Wind transportation (Fig. 49.4 ). finest particles carried high in the air in suspension; larger particles bounce .....

Geology Class Notes


Deserts tend to have sparse vegetation due to low moisture, and high relief due ... Removal of sand and silt sized particles by wind action is called deflation. ... are narrow linear dunes that form at right angles to the prevailing wind direction. ... These are parallel to the prevailing wind and may be as much as 200m high and ....

Section 10 - Deserts and Wind, Planetary Geology


This produces an abundance of cloud formation and high precipitation. ... Sand dunes are not the predominant landforms in most deserts! In fact ... dunes - Dunes that form long ridges of sand oriented parallel to the prevailing wind direction.



Badlands are areas of rugged, high-dissected, barren topography ... Sandstorms occur in areas where sand is the dominant surface material – and are confined to the ... Longitudinal Dunes are long, narrow, parallel dunes that are aligned with the prevailing wind direction formed in areas of limited sand and strong winds.

Get PDF (1054K) - Wiley Online Library


sand-transporting winds from the southwest obliquely intersecting the dunes. ... variation; very long parallel sand ridges, extending over tens and even ... asymmetry, possible direction and rate of lateral migration and whether they undergo ... prevailing SSE winds have caused and maintained the dune pattern ( e.g. Bagnold, ...

Helpful Resources

Multiple Choice Questions for Deserts and Winds - Chapter 13


During deposition of the sand, the prevailing winds were probably from the ______ . east west north ... Yardangs are: sand dunes arranged in long, parallel rows

Geol 101: Physical Geology PAST EXAM QUESTIONS LECTURE ...


In which of the following regions is wind NOT an important means of erosion, transport ... of sand dunes occurs as long parallel ridges of sand aligned along the prevailing ... The horns of a (1) ______ dune point towards the direction the wind blows ... The progression of development for high erosional remnants that stick up ...

Types of Dunes - USGS


Oct 29, 1997 ... Crescent-shaped mounds generally are wider than long. The slipface is on the dune's concave side. These dunes form under winds that blow from one direction , and they ... generally form sets of parallel ridges separated by miles of sand, ... three or more arms that radiate from the high center of the mound.

Sand Dunes | Coastal Care


Sand dune formation, types of dunes, and where they exist. ... Over time dunes can grow, shrink, or move in the direction of prevailing winds. ... called the foredune, a ridge of sand forming with its axis, or crest, parallel to the shoreline. ... piles of sand where there is an exceptionally high amount of sand coming to the beach.

Dune and Other Desert Features - The shape of the land, Forces ...


Although dunes, wind-blown piles of sand, make up only 20 percent of the total ... winds from the sea and winds from the land meet and push the sand into long lines. These high, parallel dunes can be quite large: Scientists have recorded ... This dune is a ridge of sand that forms perpendicular to the direction of the wind.