Metamorphism brings changes in mineral arrangement and the texture of rocks, but it never leads to new mineral assemblages.
A. true
B. false - ANSWERSB
A buried body of shale is subjected to differential stress at temperatures greater than 200 C, causing clay minerals to grow in preferred or...
Metamorphism brings changes in mineral arrangement and the texture of rocks, but it never leads to
new mineral assemblages.
A. true
B. false - ANSWERSB
A buried body of shale is subjected to differential stress at temperatures greater than 200 C, causing clay
minerals to grow in preferred orientation and producing slate. This is an example of _______________.
A. diagenesis
B. erosion
C. metamorphism
D. weathering - ANSWERSC
Clay minerals within a buried body of shale are recrystallized at 400 C and high pressure to form mica,
producing a rock called phyllite; this is an example of _______________.
A. diagenesis
B. erosion
C. metamorphism
D. weathering - ANSWERSC
Metamorphism may be induced by _______________.
, A. contact with a hot pluton
B. contact with hot groundwater
C. heat and pressure associated with deep burial
D. fault sliding
E. all of the above - ANSWERSE
Squashing a fly with a flyswatter is an example of _______________.
A. compression
B. shear stress - ANSWERSA
Spreading peanut butter on bread is an application of _______________.
A. compression
B. sheer stress - ANSWERSB
Compared to low-graded metamorphic rocks, high-grade rocks _______________.
A. always contain more quartz and feldspar
B. are produced closer to the surface, high in the stratigraphic column
C. are produced at greater temperatures and pressures
D. are produced at cooler temperatures, but greater pressures - ANSWERSC
Rocks resulting from (contact) metamorphism will not possess _______________.
A. a new mineral assemblage distinct from that found prior to intrusion
B. larger crystals than those characterizing the country rock prior to intrusion
C. foliation
D. silicate materials - ANSWERSC
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