Loess deposits in the U.S. Midwest are derived from ____.
A) the Ohio River valley
B) the Rocky Mountains
C) top soil loosened by agriculture
D) the Sahara Desert
E) glacial outwash of the Pleistocene age
Correct Answer:
Verified
Q41: Because sand grains are heavier than clay
Q42: Most dunes move only _ per year.
A)
Q43: The high runoff following sporadic desert downpours
Q44: _ has extensive loess deposits up to
Q45: An area with desert conditions in the
Q47: _ is a thin surface layer of
Q48: A large dune type is the _
Q49: The angle of repose of sand-sized particles
Q50: In the United States, large areas of
Q51: Rock debris picked up in flash floods
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