题目内容

In the greenschist facies, what are the major minerals produced from shale parent?

A. Muscovite, biotite, garnet, quartz, plagioclase feldspar
B. Muscovite, chlorite, quartz, sodium-rich plagioclase feldspar
C. Garnet, silimanite, plagioclase feldspar, quartz
D. Garnet, sodium-rich pyroxene, quartz

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Which of the following statement is the best description of breccia?

A. hard, nonfoliated rock resulting from contact metamorphism
B. composed of alternating bands of light and dark silicate minerals
C. loosely coherent rock composed of broken fragments that formed along a fault zone
D. calcite-rich, often nonfoliated

Which of the following statement is the best description of marble?

A. represents a metamorphic grade between slate and schist
B. very fine-grained and foliated with excellent rock cleavage
C. calcite-rich, often nonfoliated
D. loosely coherent rock composed of broken fragments that formed along a fault zone

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

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

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