1.) BARCHAN
- most common type
- crescent-shaped
Wind direction
backslope
slip face
Slide 36
2.) PARABOLIC DUNES
- crescent-shaped but with the concave side on the windward side
- usually elongated
- may develop in associated with deflation hollows
Wind direction
Slide 37
3.) TRANSVERSE DUNES
low sand ridge at right angles to the wind direction
may form because of large amounts of sand
wind
Slide 38
4.) LONGITUDINAL DUNES
low sand ridges parallel to the wind direction
may form because of a limited amount of sand
also known as seif dunes
wind
Slide 39
Finely textured sediment wind-blown long distances
Wind-blown glacial debris formed large deposits