1. Identify the FALSE statement. Hydrothermal fluids a. may consist of hot water
ID: 115790 • Letter: 1
Question
1. Identify the FALSE statement. Hydrothermal fluids
a. may consist of hot water, gases, or supercritical fluids.
b. can accelerate metamorphic reactions.
c. change a rock's chemical composition, a process known as exhumation. (NS)
d. can be derived from groundwater or magma, or can be the product of metamorphic reactions.
14. Which of the following statements is FALSE? Mylonite
a. forms by recrystallization in a fault zone.
b. is produced by shear stress on softened rock.
c. has pronounced foliation parallel to the direction of faulting.
d. is a product of gneiss melting to produce felsic magma and solid mafic rock. (NS)
15. Which of the following statements is FALSE? Shock metamorphism
a. involves high temperatures and compressional stress.
b. can be caused by meteorite impact.
c. causes quartz to recrystallize into coesite.
d. results from the process of exhumation. (NS)
Explanation / Answer
1) c. change a rock's chemical composition, a process known as exhumation. (NS)
Note: Hydrothermal fluids change a rock's chemical composition by the process metasomatism. Exhumation means that digging and bringing to surface which was buried.
14) d. results from the process of exhumation.
Exhumation means that digging and bringing to surface which was buried.Shock metamorphism will not be caused by exhumation .
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