GEOG 1113L
LAB 8
Assignment Online
Eolian Processes & Arid Landscapes
Georgia State University
,Lab 8: Eolian Processes & Arid Landscapes
GEOG 1113L – Introduction to Landforms Lab
Name: __Anora Oromoni ___________
I. Wind Transport and Dunes
1. Describe the difference between suspension, saltation, and surface creep.
Suspension is what happens when the sand particles get suspended in midair. These particles are
small and light enough to be carried high into the atmosphere, where they can be transported
long distances.
Saltation happens when larger particles are transported in short distance jump along a part.
These particles are too heavy to be suspended, but they can be dislodged from the surface by
wind and bounce along the ground.
Surface creep happens when exposed sand is pushed or rolled along the ground. These particles
are too heavy to be suspended or saltated, so they can only be moved by rolling or sliding along
the surface.
2. Which type of wind transport contributes the most to the formation of dunes? Saltation
3. What shape does a barchan dune have? crescent-shaped sand dune
4. When a barchan dune comes across winds moving in two directions, incredibly long dunes can
form, which are called what? Linear dune
5. When the wind is perpendicular to the crest of the dune, the dune is called what? Transverse
dune
6. As seasons change and wind blows in different directions, what type of dune will form? Star
dune
7. Which dune has a U shape and forms from unidirectional wind and the presence of vegetation?
Parabolic dune
8. Name three types of obstacles that can drive the formation of dunes. Vegetations, Cliffs, hills,
and manmade obstacles.
9. Match the term with its proper definition.
__C__ Complex Dune A. The most basic form of a dune.
__A__ Simple Dune B. The same type of dune superimposed onto one another.
, __B__ Compound Dune C. Different types of dunes overlapping one another.
10. Name three important factors that drive dune formation. Time, wind regime, and sand supply.
II. Dune Profile
Read the definitions/hints within the diagram below and use them to determine which of the
terms provided below should be placed in each blank box.
Windward (Stoss) Slope
Effective Wind Direction Slipface
Previous Slip Faces
Leeward Successive slip faces created as dune migrates
Slope
Direction of Dune Movement
LAB 8
Assignment Online
Eolian Processes & Arid Landscapes
Georgia State University
,Lab 8: Eolian Processes & Arid Landscapes
GEOG 1113L – Introduction to Landforms Lab
Name: __Anora Oromoni ___________
I. Wind Transport and Dunes
1. Describe the difference between suspension, saltation, and surface creep.
Suspension is what happens when the sand particles get suspended in midair. These particles are
small and light enough to be carried high into the atmosphere, where they can be transported
long distances.
Saltation happens when larger particles are transported in short distance jump along a part.
These particles are too heavy to be suspended, but they can be dislodged from the surface by
wind and bounce along the ground.
Surface creep happens when exposed sand is pushed or rolled along the ground. These particles
are too heavy to be suspended or saltated, so they can only be moved by rolling or sliding along
the surface.
2. Which type of wind transport contributes the most to the formation of dunes? Saltation
3. What shape does a barchan dune have? crescent-shaped sand dune
4. When a barchan dune comes across winds moving in two directions, incredibly long dunes can
form, which are called what? Linear dune
5. When the wind is perpendicular to the crest of the dune, the dune is called what? Transverse
dune
6. As seasons change and wind blows in different directions, what type of dune will form? Star
dune
7. Which dune has a U shape and forms from unidirectional wind and the presence of vegetation?
Parabolic dune
8. Name three types of obstacles that can drive the formation of dunes. Vegetations, Cliffs, hills,
and manmade obstacles.
9. Match the term with its proper definition.
__C__ Complex Dune A. The most basic form of a dune.
__A__ Simple Dune B. The same type of dune superimposed onto one another.
, __B__ Compound Dune C. Different types of dunes overlapping one another.
10. Name three important factors that drive dune formation. Time, wind regime, and sand supply.
II. Dune Profile
Read the definitions/hints within the diagram below and use them to determine which of the
terms provided below should be placed in each blank box.
Windward (Stoss) Slope
Effective Wind Direction Slipface
Previous Slip Faces
Leeward Successive slip faces created as dune migrates
Slope
Direction of Dune Movement
