Till deposits are associated with
a. lakes. d. playa lakes.
b. glaciers. e. beaches.
c. sand dunes.
B
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Acid mine drainage is a problem because
A) it dissolves limestone B) it represents a waste of ore that could be mined C) it adds sulfur to coal, making it less desirable as a fuel source D) the acid water may mobilize hazardous heavy metals
Life expectancy in parts of southern Africa ________
A) cannot be determined due to lack of adequate methods for data collection B) has fallen dramatically since 1990 C) has stabilized due to population control D) is starting to fall E) is on the rise
Basaltic magma generally produces non-explosive eruptions
a. True b. False
Lower viscosity magmas will result in more explosive volcanic eruptions
a. True b. False Indicate whether the statement is true or false