Briefly describe the four main dune types and how they differ from each other? What will be an ideal response?
Barchan dunes are crescent-shaped dunes whose tips point downwind. They form in flat, dry areas
with little vegetation, limited sand, and nearly constant wind direction. Longitudinal dunes are long,
parallel ridges of sand aligned parallel to the direction of the prevailing winds; they form where the
sand supply is somewhat limited. Transverse dunes form long ridges perpendicular to the prevailing
wind direction in areas with abundant sand and little or no vegetation. Parabolic dunes are common in
coastal areas with strong onshore winds and a partial vegetation cover.
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Latin America had cities before the Columbian Exchange
Indicate whether this statement is true or false
How does universal kriging differ from ordinary kriging?
What will be an ideal response?
Why do negative feedback loops tend to diminish the effect of disturbances?
What will be an ideal response?
The typical trend in a rising plume of subduction-zone magma is to increase the ________.
A. viscosity B. explosive potential of the magma by holding in the gases more tightly C. percentage of SiO2 D. All of these choices are correct.