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- Multiple ChoicePlease save your changes before editing any questions.
What is the process of changing the characteristics of a rock caused by changes in temperature, pressure, or volatile content?
metamorphism
lithification
recrystallization
rock cycle
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What is the correct term used to refer to the pre-existing rock that undergoes metamorphism?
gneiss
schist
rock
protolith
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Which of the following statements is not true about metamorphism?
Metamorphism usually occurs during burial, tectonic movements, heating and presence of chemically active fluids.
Metamorphism can range from slight to considerable changes in the parent rock.
Metamorphism occurs when there is an increase in temperature and pressure which results to melting of rocks.
Metamorphism of the protolith changes the texture and mineralogy of the original rock.
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What will happen if the the temperature-pressure conditions exceeds the requirement for metamorphism?
Rocks will melt and form igneous rocks.
Rock will be changed into another metamorphic rock.
Rocks will begin to weather and undergo erosion.
Rocks will be compacted and cemented by heat.
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Which of the following processes refers to the formation of new minerals from the decomposition of old minerals?
recrystallization
neocrystallization
phase change
pressure solution
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Which of the following statements is true during the process of phase change?
It is characterized by the melting and recrystallization of mineral grains exposed to changes in pressure.
It occurs slowly due to the change in mineral’s size and shape as it forms a more crystalline structure.
It usually occurs when rocks are squeezed in one direction with the presence of water.
It occurs when there is a change in mineral structure while retaining the same chemical composition.
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What happens to rocks during plastic deformation?
Rocks are deformed resulting to larger crystals.
Rocks tend to exhibit partial melting.
Rocks start to behave as a brittle material.
Rocks tend to stretch instead of breaking.
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Which refers to the relative temperature and pressure conditions during the formation of metamorphic rocks?
retrograde
metamorphic grade
prograde
protolith
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Which of the following processes occurs when temperature and pressure are decreased and begins to require addition of hydrothermal fluids or water?
prograde metamorphism
regional metamorphism
retrograde metamorphism
dynamic metamorphism
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What is usually formed during dynamic metamorphism?
mylonites
hornfels
stishovite
gneiss