Which of the following is the most appropriate description of the slaty cleavage?
A. shiny, planar alignment of mica to form a foliation
B. closely-spaced planar surfaces along which rocks split into thin, tabular slabs when hit with a hammer
C. a small number of very large crystals surrounded by the finer-grained rock
D. a banded foliation resulting from a segregation of minerals
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Where is the probable location that the regional metamorphism most likely occurs:
A. in close association with a mid-ocean ridge
B. within mountain belts as they form from continental collision
C. in close proximity to a pluton or cooling magma body
Which of the following is the most appropriate description about the gneissic structure?
A. closely-spaced planar surfaces along which rocks split into thin, tabular slabs when hit with a hammer
B. a small number of very large crystals surrounded by the finer-grained rock
C. shiny, planar alignment of mica to form a foliation
D. a banded foliation resulting from a segregation of minerals
Why do metamorphic changes occur at great depths?
A. Greater depths are the locations of greater temperature and pressure necessary for metamorphism.
B. Temperature increases with depth, causing rocks descending deeper to become progressively less stable and to metamorphose in response.
C. Great depth is the area where most chemically active fluids are found, thus producing the most amount of hydrothermal metamorphism.
D. Temperature decreases with depth, causing rocks descending deeper to become progressively less stable and to metamorphose in response.
Which of these is the most complete list of the agents of metamorphism, the agents that drive metamorphic transformations in rocks?
A. pressure, temperature, heat
B. chemically active fluids, pressure, differential stress
C. heat, differential stress, chemically active fluids
D. heat, pressure, parent rock
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