Question 1

________ metamorphism is responsible for the emplacement of metallic ore veins.

Accepted Answer

A) Contact 
B) Burial 
C) Hydrothermal 
D) Subduction zone 
A) Contact 
B) Burial 
C) Hydrothermal 
D) Subduction zone C

Question 2

What are the two main categories of metamorphic texture?

Accepted Answer

A) Heat and pressure 
B) Schistosity and dissolution 
C) Vesicular and pyroclastic 
D) Foliated and nonfoliated 
A) Heat and pressure 
B) Schistosity and dissolution 
C) Vesicular and pyroclastic 
D) Foliated and nonfoliated D

Question 3

Which of the following can be a parent rock for gneiss?

Accepted Answer

A) Shale 
B) Granite 
C) Schist and phyllite 
D) Marble and shale 
E) Shale, granite, schist, and phyllite 
A) Shale 
B) Granite 
C) Schist and phyllite 
D) Marble and shale 
E) Shale, granite, schist, and phyllite E

Question 4

What is the parent rock of the metamorphic sample displayed?

Accepted Answer

A) Limestone 
B) Quartz sandstone 
C) Shale 
D) Granite 
A) Limestone 
B) Quartz sandstone 
C) Shale 
D) Granite

Question 5

Generally speaking, how does the chemical composition of most metamorphic rocks compare to that of the parent rock?

Accepted Answer

A) Their chemical composition will be nearly the same. 
B) In order to be a metamorphic rock, the chemical composition must change by 50 percent. 
C) There will be a complete compositional change. 
D) Knowing the chemical composition is not necessary to understand metamorphic rocks. 
A) Their chemical composition will be nearly the same. 
B) In order to be a metamorphic rock, the chemical composition must change by 50 percent. 
C) There will be a complete compositional change. 
D) Knowing the chemical composition is not necessary to understand metamorphic rocks.

Question 6

The geothermal gradient represents a decrease in interior temperature with decreasing distance from the surface.

Accepted Answer

A) True 
 B)False

Question 7

What is gneissic banding, how does it form, and how does it compare to the color banding that is often found in marble?

Accepted Answer

Gneissic banding is the highest degree o

Question 8

Which of the following scenarios best describes the formation of hornfels?

Accepted Answer

A) Mudstones are metamorphosed by directed pressure. 
B) Granite is melted and recrystallized. 
C) Shales and mudstones are baked during contact metamorphism. 
D) Phyllite is altered by contact with hydrothermal fluids. 
A) Mudstones are metamorphosed by directed pressure. 
B) Granite is melted and recrystallized. 
C) Shales and mudstones are baked during contact metamorphism. 
D) Phyllite is altered by contact with hydrothermal fluids.

Question 9

Which style of metamorphism will be generated by a magma pluton?

Accepted Answer

A) Contact 
B) Subduction zone 
C) Burial 
D) Regional 
A) Contact 
B) Subduction zone 
C) Burial 
D) Regional

Question 10

Foliated textures are primarily the result of heat.Nonfoliated textures are primarily the result of directed pressure.

Accepted Answer

A) True 
 B)False

Question 11

________ is the process by which a rock changes form or mineral content as a result of environmental changes such as heat and pressure.

Accepted Answer

A) Rifting 
B) Precipitation 
C) Metamorphism 
D) Foliation 
A) Rifting 
B) Precipitation 
C) Metamorphism 
D) Foliation

Question 12

Why is quartz a bad mineral to use to determine a metamorphic environment?

Accepted Answer

A) Because it is not common in metamorphic rocks 
B) Because silicate minerals do not metamorphose 
C) Because quartz is stable over a wide range of metamorphic settings 
D) Because it can only be used in hydrothermal metamorphism 
A) Because it is not common in metamorphic rocks 
B) Because silicate minerals do not metamorphose 
C) Because quartz is stable over a wide range of metamorphic settings 
D) Because it can only be used in hydrothermal metamorphism

Question 13

What are the four agents of metamorphism?

Accepted Answer

Heat, pressure, diff

Question 14

________ can produce intricately folded rocks.

Accepted Answer

A) Differential stress 
B) Confining pressure 
C) Heat 
D) Hydrothermal fluids 
E) Cold surface water 
A) Differential stress 
B) Confining pressure 
C) Heat 
D) Hydrothermal fluids 
E) Cold surface water

Question 15

Can parent rock features such as sedimentary structures and fossils survive low-grade metamorphism?

Accepted Answer

A) Yes, because the shells of the organisms are strong enough to withstand directed pressure. 
B) No, because the sediments and organic materials will be melted. 
C) Yes, because such features can withstand low temperatures and pressures but will be destroyed in higher metamorphic grades. 
D) No, because even low-grade pressure is too much for such delicate features. 
A) Yes, because the shells of the organisms are strong enough to withstand directed pressure. 
B) No, because the sediments and organic materials will be melted. 
C) Yes, because such features can withstand low temperatures and pressures but will be destroyed in higher metamorphic grades. 
D) No, because even low-grade pressure is too much for such delicate features.

Question 16

What is the average increase in temperature along the geothermal gradient in the upper crust?

Accepted Answer

A) 13°C per km 
B) 25°C per km 
C) 30°C per km 
D) 42°C per km 
A) 13°C per km 
B) 25°C per km 
C) 30°C per km 
D) 42°C per km

Question 17

________ metamorphism tends to occur in regions where massive amounts of sedimentary or volcanic materials accumulate in a subsiding basin, pushing older rocks further into the interior.

Accepted Answer

A) Contact 
B) Hydrothermal 
C) Burial 
D) Regional 
A) Contact 
B) Hydrothermal 
C) Burial 
D) Regional

Question 18

What degree of foliation is exhibited by the metamorphic rock in the image above?

Accepted Answer

A) Schistosity 
B) Nonfoliation 
C) Gneissic banding 
D) Slaty cleavage 
A) Schistosity 
B) Nonfoliation 
C) Gneissic banding 
D) Slaty cleavage

Question 19

What is the definition of metasomatism?

Accepted Answer

A) The rearrangement of ions already present due to changes in heat 
B) The lengthening of mineral crystals due to directed pressure 
C) The change in chemical composition because hot fluids are bringing or removing ions 
D) The more compact organization of mineral crystals due to confining pressure 
A) The rearrangement of ions already present due to changes in heat 
B) The lengthening of mineral crystals due to directed pressure 
C) The change in chemical composition because hot fluids are bringing or removing ions 
D) The more compact organization of mineral crystals due to confining pressure

Question 20

What kind of metamorphism will occur if the environmental conditions are 400°C and 5 kilobars?

Accepted Answer

A) Hydrothermal 
B) Contact 
C) Regional 
D) Subduction zone 
A) Hydrothermal 
B) Contact 
C) Regional 
D) Subduction zone

Exam 8: Metamorphism and Metamorphic Rocks

________ metamorphism is responsible for the emplacement of metallic ore veins.

What are the two main categories of metamorphic texture?

Which of the following can be a parent rock for gneiss?

What is the parent rock of the metamorphic sample displayed?

Generally speaking, how does the chemical composition of most metamorphic rocks compare to that of the parent rock?

The geothermal gradient represents a decrease in interior temperature with decreasing distance from the surface.

What is gneissic banding, how does it form, and how does it compare to the color banding that is often found in marble?

Which of the following scenarios best describes the formation of hornfels?

Which style of metamorphism will be generated by a magma pluton?

Foliated textures are primarily the result of heat.Nonfoliated textures are primarily the result of directed pressure.

________ is the process by which a rock changes form or mineral content as a result of environmental changes such as heat and pressure.

Why is quartz a bad mineral to use to determine a metamorphic environment?

What are the four agents of metamorphism?

________ can produce intricately folded rocks.

Can parent rock features such as sedimentary structures and fossils survive low-grade metamorphism?

What is the average increase in temperature along the geothermal gradient in the upper crust?

________ metamorphism tends to occur in regions where massive amounts of sedimentary or volcanic materials accumulate in a subsiding basin, pushing older rocks further into the interior.

What degree of foliation is exhibited by the metamorphic rock in the image above?

What is the definition of metasomatism?

What kind of metamorphism will occur if the environmental conditions are 400°C and 5 kilobars?

An Introduction to Geology

Plate Tectonics: a Scientific Revolution Unfolds

Matter and Minerals

Magma, Igneous Rocks, and Intrusive Activity

Volcanoes and Volcanic Hazards

Weathering and Soil

Sedimentary Rocks

Geologic Time

Crustal Deformation

Earthquakes

Earths Interior

Divergent Boundaries

Convergent Boundaries

Mass Wasting

Running Water

Groundwater

Glaciers and Glaciation

Deserts and Winds

Shorelines

Global Climate Change

Earths Evolution Through Geologic Time

Energy and Mineral Resources

Touring Our Solar System

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