Briefly describe two hypotheses used to explain the formation of desert pavement
What will be an ideal response?
Desert pavement is thought to form by either (1) deflation lowering the land surface by removing sand and silt from poorly sorted sediment, leaving only gravel and pebbles behind in a "cobblestone"-type arrangement, or (2) a surface that initially consists of pebbles trapping fine wind-blown sediment at protruding cobbles, forcing the fine grains to settle downward between the pebble spaces.
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A ________ is an area organized into a political unit and ruled by an established government that has control over its internal and foreign affairs
A) nation B) state C) province D) territory E) continent
Which of the following examples provide correct stratigraphic record to document global climate change?
a. A bed of coal represents deposits of a warm climate b. A bed of till represents deposits of a glacial climate c. Breccia represents a warm climate where the rapid flow carries the sand for a long distance d. All of the above e. Both a and b
The thicker crust of mountains ____
A)sinks into thinner crust at depth B)floats on denser rock at depth C)is more dense than oceanic crust D)reduces faulting during orogeny E)is more dense than other continental crust
Briefly explain the trade-offs that accompany any flood control project