What are the three classes of dune forms? Describe an example within each class. What do you think is the major shaping force for sand dunes? Which form of dune is the mountain giant of the desert?...

What are the three classes of dune forms? Describe an example within each class. What do you think is the major shaping force for sand dunes?

Which form of dune is the mountain giant of the desert? What are the characteristic wind patterns that produce such dunes?