week 9 ~ aeolian
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Last updated 2:58 AM on 3/30/23
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26 Terms
1
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what are the classifying agents of a desert?
regions with little rainfall + vegetation
have bare/loose dry material
have bare/loose dry material
2
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what are the 3 ways air moves?
1\. streamlined
2\. turbulent
3\. vortices
2\. turbulent
3\. vortices
3
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what is deflation?
removal of loose particles by windwhat is
4
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what is abrasion?
bombarding of surfaces by particles carried by the wind
5
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what is this?
deflation hollow and pan
6
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what is this?
yardangs → streamlined ridges parallel to wind
7
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what is this?
zeugan
8
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what is this?
ventifacts
9
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what are the characteristics of wind as a geomorphic agent?
less dense + viscous than water
can only move find non cohesive material
very well sorted sediment
can only move find non cohesive material
very well sorted sediment
10
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what is the relationship between air movement and height?
air gets faster as you go up since there is more friction towards the ground
11
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why is wind faster in open terrain than urban areas?
there is less friction on the ground
12
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how does desert pavement form?
1 - wind removes fine material, leaving only coarse
2 - continued deflation concentrates larger material
3 - surface protected by large stones
2 - continued deflation concentrates larger material
3 - surface protected by large stones
13
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what are the smallest depositional landforms?
ripples
perpendicular to wind direction
perpendicular to wind direction
14
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what are these?
transverse dunes
unimodal wind + lots of sand
unimodal wind + lots of sand
15
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what are these?
barchanoid ridges
16
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what are these?
barchan dunes
17
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what are these?
domes dunes
18
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what are these?
linear dunes
parallel to wind
parallel to wind
19
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what are these?
star dunes
very high sediment + complex winds
very high sediment + complex winds
20
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what are these?
dune networks
very complex + turbulent winds
very complex + turbulent winds
21
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what are these?
leedunes + foredunes
22
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what are these?
climbing dunes
perpendicular to ridges
perpendicular to ridges
23
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what are these?
parabolic dunes
need to be anchored by vegetation
need to be anchored by vegetation
24
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what are these?
lunettes
25
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what are these?
nabkha
26
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what is a loess?
terrestrial sediment composed of windblown silt
highly erodible due to fin particle sizes
highly erodible due to fin particle sizes
Note 
Flashcards (31)