Metamorphism and Metamorphic Rocks

Steven Dutch, Natural and Applied Sciences, University of Wisconsin - Green Bay
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Which indicates the highest metamorphic grade?
1. epidote
2. kyanite
3. chlorite
4. amphibole
5. feldspar
A metamorphosed equivalent of a limestone would be a:
1. dolomite
2. marble
3. schist
4. amphibolite
5. none of these
Three minerals which are not normally found in sedimentary and igneous rocks are:
1. quartz, biotite and plagioclase
2. sillimanite, kyanite and garnet
3. biotite, muscovite and clay
4. garnet, kyanite and feldspar
Metamorphic rocks may generally be distinguished from igneous rocks because:
1. the grains of igneous rock are interlocking, whereas they are not interlocking in a metamorphic rock
2. metamorphic rocks are foliated, whereas igneous rocks are not
3. their mineral assemblages are different
4. they are generally finer grained
5. none of these
Which is a product of metamorphism?
1. phenocrysts
2. dolomite
3. amphibolites
4. ripple marks
5. cross-beds
Metamorphic zones are identified by:
1. index minerals
2. index fossils
3. index rocks
4. index pressure
5. none of these
During the metamorphism of a shale to a slate, many of the clay minerals have been transformed into:
1. mica and chlorite
2. muscovite and kyanite
3. biotite and almandite
4. none of these
5. quartz and staurolite
Gneiss:
1. shows dark and light bands of minerals
2. has recrystallized at low temperatures
3. has good rock cleavage parallel to banding
4. is very fine-grained
In the expression "kyanite schist," the "kyanite" indicates
1. a distinctive mineral in the rock
2. the degree the rock has been metamorphosed
3. both a and b
4. the texture of the rock
In the expression "kyanite schist," the "schist" indicates
1. a distinctive mineral in the rock
2. the degree and rock has been metamorphosed
3. both a and b
4. the texture of the rock
A place where rocks are probably being subjected to contact metamorphism
1. a mile under Mount Saint Helens
2. 15 miles beneath Japan
3. a mile under Wisconsin
4. 3 miles under Florida
A place where rocks are probably being subjected to regional metamorphism
1. a mile under Mount Saint Helens
2. 15 miles beneath Japan
3. a mile under Wisconsin
4. 3 miles under Florida
Why foliation is useful to a geologist
1. it indicates rocks have been deformed
2. it provides clues to the orientation of large-scale structures
3. it provides clues to the stresses that deformed the rocks
4. all of the above
A foliated rock is foliated
1. parallel to bedding planes
2. parallel to the greatest compression
3. at right angles to the greatest compression
4. at right angles to the direction of stretching
Pressure exerted equally in all directions on rocks in the crust is:
1. differential
2. shear
3. directional
4. none of these
5. lithostatic
In which type of metamorphism are magmatic heat and fluids the primary agents of change?
1. contact
2. local
3. dynamic
4. thermodynamic
5. regional
Concentric metamorphic zones surrounding an igneous intrusion are:
1. metamorphic layers
2. hydrothermal regions
3. thermodynamic rings
4. none of these
5. aureoles
Which of the following is not a metamorphic mineral?
1. graphite
2. garnet
3. asbestos
4. gypsum
5. talc
Which of the following is the dangerous variety of asbestos?
1. chrysotile
2. actinolite
3. crocidolite
4. anthophyllite
5. tremolite
Metamorphic rocks form a significant proportion of:
1. shields
2. oceanic crust
3. coastal plains
4. the cores of mountain ranges
5. answers (a) and (c)
Metamorphic zones:
1. are characterized by distinctive mineral assemblages
2. are separated from each other by isograds
3. reflect a metamorphic grade
4. all of these
5. none of these
To which metamorphic facies do metamorphic rocks formed under low-temperature, low-pressure conditions belong?
1. granulite
2. blueschist
3. greenschist
4. eclogite
5. amphibolite
Along what type of plate boundary is metamorphism most common?
1. convergent
2. mantle plume
3. divergent
4. static
5. transform
Which is not a stage in the diagenesis and metamorphism of coal?
1. anthracite
2. lignite
3. diamond
4. graphite
5. bituminous
Metamorphic rocks resulting from pure dynamic metamorphism are:
1. fault breccias
2. mylonites
3. quartzites
4. hornfels
5. greenstones
Which type of metamorphism produces the majority of metamorphic rocks?
1. contact
2. lithostatic
3. dynamic
4. lithospheric
5. regional
Which of the following metamorphic rocks displays a foliated texture?
1. marble
2. schist
3. quartzite
4. hornfels
5. greenstone
The metamorphic rock formed from limestone is:
1. quartzite
2. slate
3. hornfels
4. greenstone
5. marble
From which of the following rock groups can metamorphic rocks form?
1. plutonic
2. volcanic
3. sedimentary
4. all of these
5. metamorphic
Which of the following is not an agent of metamorphism?
1. gravity
2. fluid activity
3. heat
4. pressure
What is the correct metamorphic sequence of increasingly coarser grain size?
1. phyllite --> slate --> gneiss --> schist
2. slate --> phyllite --> schist --> gneiss
3. gneiss --> phyllite --> slate --> schist
4. schist --> gneiss --> phyllite --> slate
5. slate --> schist --> gneiss --> phyllite
An excellent rock for billiard table tops, floor and roofing tiles, and blackboards is:
1. marble
2. hornfels
3. gneiss
4. slate
5. phyllite
Mixed rocks containing the characteristics of both igneous and high-grade metamorphic rocks are
1. mylonites
2. hornfels
3. migmatites
4. greenstones
5. amphibolites
Which is a nonfoliated rock?
1. slate
2. schist
3. gneiss
4. marble
Diamond and graphite are both made of carbon but have different atomic structures and very different properties. This phenomenon is called:
1. Isometry
2. Polymorphism
3. Multiphasing
4. Homology

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Created 3 January 1997; Last Update 16 November 2004

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