deserts Flashcards
1
Q
Barchan
A
- individual cones pointing downwind
- limited sand supply
- constant direction at right angle to dune
- no vegetation
- highly mobile
2
Q
barchanoid ridges
A
- right angled to wind, parallel ridges
- limited sand
- constant direction at right angle to wind
- no vegetation
- mobile
3
Q
transverse
A
right angle to wind, resemble ocean waves
- thick sand cover
- constant at right angle to wind but reduced speed
- vegetation present
- limited mobility
4
Q
dome
A
dome shaped
- available coarse sand
- strong winds limit dune height
- no vegetation
- virtually no movement
5
Q
linear
A
long parallel longitudinal rides -large sand supply -persistent wind with slight seasonal direction change -no vegetation no movement
6
Q
parabolic
A
hairpin shaped with curve facing wind direction
- limited sand supply
- constant direction
- highly mobile
7
Q
star
A
complex with starfish shape
- limited sand supply
- winds blow form several directions
- no vegetation
- no movement
8
Q
reversing
A
undulating shape l-limited sand supply -equal wind strength from opposite sides -no vegetation -no movement
