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By definition, a metamorphic rock can no...View Answer
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A) does not vary in width within a given metamorphic formation
B) is always nonfoliated rock
C) is composed of non-metamorphosed rock
D) makes up a single metamorphic zone
E) is where rock types change
G) A) and B)
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A) is confined only to convergent margins
B) occurs over a large area
C) occurs in shallow areas of Earth's crust
D) is difficult to see along convergent plate boundaries
E) usually has no gradation in metamorphic intensity from one area to another
G) A) and C)
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B
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pressure, ...View Answer
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B) False
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Contact metamorphism takes place when a body of magma alters the surrounding country rock. At shallow depths, intruding magma raises the temperature of the surrounding rock, causing thermal alteration. Furthermore, the release of hot fluids into the country rock by the cooling intrusion can aid in the formation of new minerals. Dynamic metamorphism is associated with faults or fault zones, where rocks are subjected to high levels of differential pressure. The metamorphic rocks that result from pure dynamic metamorphism are typically restricted to narrow zones adjacent to faults. Regional metamorphism is responsible for the formation of most metamorphic rocks. It occurs over a large area and is usually caused by tremendous temperatures, pressures, and deformations all occurring together within the deeper portions of the crust. Regional metamorphism is most obvious along convergent plate boundaries where rocks are intensely deformed and recrystallized during convergence and subduction.
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A) as country rock is melted by contact with magma
B) while rocks remain solid
C) without high temperatures as long as rocks are buried at great depth
D) without high pressure, as long as high temperatures are present
E) only with fluid activity
G) A) and C)
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A) composed of igneous, sedimentary, and metamorphic rocks
B) composed of sedimentary and metamorphic rocks
C) composed of limestone and quartz
D) regions of the continents where basement rocks are widely exposed
E) regions of the continents where basement rocks are deeply buried
G) A) and E)
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Chemical reactions proceed at different ...View Answer
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A) metamorphic zone
B) isograd
C) metamorphic facies
D) contact zone
E) profile
G) C) and D)
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A) formation at high temperature and pressure
B) evidence of an ancient subduction zone
C) migmatite melting in a subduction zone
D) gneiss formation nearby
E) rock that is a very good heat conductor
G) B) and D)
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B) False
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A) geostatic
B) geohydrous
C) geothermal
D) hydrothermal
E) hydrostatic
G) B) and E)
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A) an extremely hard rock
B) the result of dynamic metamorphism
C) metamorphosed limestone or dolostone
D) rarely used for building
E) metamorphosed quartz
G) B) and C)
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B) False
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A) water seeping through the rock in one direction
B) the north\south magnetic poles
C) the greater force of gravity closer to Earth's center
D) pressure applied to two sides
E) pressure applied equally to all sides
G) D) and E)
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D
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A) is always sharp and well-defined
B) is not dependent on the temperature of the intruding magma
C) is defined by an isograd
D) increases with distance from the intrusion
E) decreases with distance from the intrusion
G) B) and D)
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A) is produced during the lower temperature range of metamorphism
B) is a nonfoliated rock
C) never occurs due to regional metamorphism
D) always shows rotational metamorphism
E) has both igneous and metamorphic characteristics
G) None of the above
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A) most common along convergent plate margins
B) rare along convergent plate margins
C) most common along divergent plate margins
D) difficult to identify metamorphic rock that forms along divergent plate margins
E) coincidental that this association occurs
G) A) and D)
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