Which of these mineral assemblages is characteristic of a greenschist facies?
A) Potassium feldspar, biotite, and quartz
B) Chlorite, epidote, and serpentine
C) Hornblende
D) Quartz and muscovite
Answer: B
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This is NOT a significant factor in explaining why the United States experiences so many tornadoes:
A) relatively flat in eastern portion. B) lack of major east-west mountain range in east. C) spans wide range of latitudes. D) bordered by a cold ocean current on west coast.
Standard sea level air pressure is 1013 millibars
Indicate whether the statement is true or false
One result of the U.S. trade deficit is that the U.S. has become a debtor nation
Indicate whether the statement is true or false
What does the tendency of micas to produce thin cleavage flakes suggest about its crystal structure?
A) The structure is produced by flow in the igneous rock, aligning glass layers within the crystal structure. B) The structure is characterized by rings that form an interlocking network, forming planar sheets. C) The crystal structure is characterized by complex polymerized mats that form a sheetlike structure. D) The atoms are arranged in orderly arrangements that form strongly bonded sheets separated by weak bonds between the sheets.