23 Questions
Foliation is the repetition of planar surfaces or layers in a metamorphic rock. True or False?
True
Foliated rock has been not been subjected to differential stress.
False
What is an example of foliated rock?
all of the above
Non-foliated rock is crystallized without differential stress.
True
Non-foliated rock is made up of
equant materials only
Foliation is possible if
minerals are inequant
Metamorphic grade is the amount/degree of metamorphic change of the ___________.
protolith
Prograde refers to
metamorphism by increasing temperature & pressure
Which does not happen when increasing metamorphic grade?
mineral growth slows down
Index minerals are minerals that have limited temperature-pressure range.
True
Which of the following can be used to determine the degree of metamorphism that a rock has experienced?
index mineral
Metamorphic facies are mineral assemblages from a specific protolith at specific temperature-pressure conditions.
True
In a thermal setting, metamorphism happens due to
heat from intrusive magma
Bands of alteration created in the host rock during plutonic intrusion are zoned from
high grade to low grade
Metamorphosis that occurs during burial happens because
All of the above
Burial metamorphism requires burial below diagenetic effects, happening around 8-15km, depending on the geothermal gradient.
True
Dynamic metamorphism occurs in which setting
at a fault zone
When dynamic metamorphism occurs in shallow crust, rocks behave in a ______ manner. When dynamic metamorphism occurs in deeper crust, rocks behave in a ______ manner.
brittle, ductile
Regional metamorphism occurs when temperatures and pressures are altered due to orogenesis.
True
Regional metamorphism causes which of the following
all of the above
Where does hydrothermal metamorphism occur?
Mid-ocean ridges
During subduction, which of the following is true for metamorphism to occur
low geothermal gradient & high pressure
Shock metamorphism might happen because
A large comet struck the Earth
Test your knowledge of foliation in metamorphic rocks with this quiz. Determine if statements about foliated and non-foliated rocks are true or false, and identify examples of foliated rock.
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