Which of the following is NOT a glacial erosional landform?
a. cirque
b. arête
c. esker
d. col
e. horn
C
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Sinkholes result from ________
A) building on floodplains B) overconsumption of water from aquifers weakening the substrate C) substrates that become weak following rain D) poorly drilled wells in soft soils E) flood damage and chemical erosion
Mudflows generally contain ________.
A. primarily mud-sized particles with some water, but certainly no particles greater than sand size B. primarily water with some mud-sized particles, but no larger grains C. only mud-sized particles D. primarily mud-sized particles with some water, but may also contain particles as large as boulders E. primarily mud-sized particles with some water, but no larger grains
If sediment is from natural sources, why is it considered a water pollutant?
A) it is an out-of-place resource B) it is toxic at its source, so it is also toxic in the water C) it is usually laden with mercury D) it is only a pollutant if it contains agricultural chemicals
A dike is a discordant intrusive igneous structure.
Answer the following statement true (T) or false (F)