Question 1

This dark gray igneous rock is glassy and elsewhere contains small vesicles and flow bands. What kind of eruption probably formed this rock?

Accepted Answer

A)  eruption of a low-viscosity, basaltic lava flow 
B)  eruption of high-viscosity lava in a dome 
C)  dome collapse that forms volcanic breccia 
D)  eruption of a pyroclastic flow that forms a thick and hot deposit 
E)  slow settling of ash from a tall eruption column forming a nonwelded tuff 
A)  eruption of a low-viscosity, basaltic lava flow 
B)  eruption of high-viscosity lava in a dome 
C)  dome collapse that forms volcanic breccia 
D)  eruption of a pyroclastic flow that forms a thick and hot deposit 
E)  slow settling of ash from a tall eruption column forming a nonwelded tuff

Question 2

According to the fossil record, what events have coincided with the approximate times when flood basalts were erupting?

Accepted Answer

A)  mass extinction 
B)  increased diversity of life 
C)  climate stability and flourishing of life 
A)  mass extinction 
B)  increased diversity of life 
C)  climate stability and flourishing of life

Question 3

What type of volcano is Mount Rainier?

Accepted Answer

A)  composite 
B)  scoria cone 
C)  shield 
D)  caldera 
A)  composite 
B)  scoria cone 
C)  shield 
D)  caldera

Question 4

Composite volcanoes are so called because they:

Accepted Answer

A)  are a combination of shield volcanoes, scoria cones, and other volcanoes 
B)  have many different types of geologic hazards 
C)  were first discovered on the island of Composita in Italy 
D)  are composed of lava flows, pyroclastic material, and mudflows 
E)  none of these 
A)  are a combination of shield volcanoes, scoria cones, and other volcanoes 
B)  have many different types of geologic hazards 
C)  were first discovered on the island of Composita in Italy 
D)  are composed of lava flows, pyroclastic material, and mudflows 
E)  none of these

Question 5

Earthquakes at Mount St. Helens prior to the major eruption in 1980 were caused by:

Accepted Answer

A)  magma rising in the volcano 
B)  tectonic plate movement 
C)  landslides 
A)  magma rising in the volcano 
B)  tectonic plate movement 
C)  landslides

Question 6

What type of volcanic eruption is shown in this photograph?

Accepted Answer

A)  a lava fountain 
B)  collapse of a volcanic dome 
C)  a fissure eruption 
D)  a pyroclastic column 
E)  a volcanic mudflow 
A)  a lava fountain 
B)  collapse of a volcanic dome 
C)  a fissure eruption 
D)  a pyroclastic column 
E)  a volcanic mudflow

Question 7

Which of the following is NOT a typical characteristic of a volcano?

Accepted Answer

A)  Conical-shaped hill 
B)  Crater at or near the top of a hill 
C)  Fresh ash layers or lava flows covering part of a conical hill 
D)  Flat-topped mesa with eroded volcanic rock cliffs at that top 
A)  Conical-shaped hill 
B)  Crater at or near the top of a hill 
C)  Fresh ash layers or lava flows covering part of a conical hill 
D)  Flat-topped mesa with eroded volcanic rock cliffs at that top

Question 8

What types of rocks would be most common in the volcano shown in this photograph?

Accepted Answer

A)  scoria 
B)  basalt mostly formed in lava flows 
C)  felsic and intermediate lava flows 
D)  tuff and tephra 
E)  none of these 
A)  scoria 
B)  basalt mostly formed in lava flows 
C)  felsic and intermediate lava flows 
D)  tuff and tephra 
E)  none of these

Question 9

Which of the following is NOT a volcanic hazard made worse by being located along a river valley directly downhill from a volcano?

Accepted Answer

A)  lava flows 
B)  small pyroclastic flows 
C)  mudflows 
D)  burial by falling ash 
A)  lava flows 
B)  small pyroclastic flows 
C)  mudflows 
D)  burial by falling ash

Question 10

Which of the following is NOT a characteristic of a volcanic dome?

Accepted Answer

A)  the outer part of the dome contains blocks and other rubble 
B)  some parts contain volcanic glass, such as obsidian 
C)  they are one of the largest types of volcanoes 
D)  many domes are associated with composite volcanoes and calderas 
A)  the outer part of the dome contains blocks and other rubble 
B)  some parts contain volcanic glass, such as obsidian 
C)  they are one of the largest types of volcanoes 
D)  many domes are associated with composite volcanoes and calderas

Question 11

What type of eruption is shown in this photograph?

Accepted Answer

A)  lava flow 
B)  lava dome 
C)  lava fountain 
D)  pyroclastic flow 
A)  lava flow 
B)  lava dome 
C)  lava fountain 
D)  pyroclastic flow

Question 12

Which of the following factors indicates a high risk for volcanic mudflows or lahars?

Accepted Answer

A)  a shield volcano that forms a low mountain in the tropics 
B)  a volcano whose hillslopes are covered with hard basaltic lava 
C)  a volcano with a thick covering of snow or ice 
D)  all of these 
A)  a shield volcano that forms a low mountain in the tropics 
B)  a volcano whose hillslopes are covered with hard basaltic lava 
C)  a volcano with a thick covering of snow or ice 
D)  all of these

Question 13

What type of eruption is shown in this photograph?

Accepted Answer

A)  lava flow 
B)  lava dome 
C)  lava fountain 
D)  pyroclastic column 
E)  pyroclastic flow 
A)  lava flow 
B)  lava dome 
C)  lava fountain 
D)  pyroclastic column 
E)  pyroclastic flow

Question 14

Which of the following sites near a volcano might be relatively less dangerous?

Accepted Answer

A)  a site that is within the shelter provided by the volcano's central crater 
B)  a site on a ridge as opposed to a site in a valley 
C)  a site protected by steep slopes of the volcano 
D)  a site where rocks have been weakened by hot volcanic fluids 
E)  all of these 
A)  a site that is within the shelter provided by the volcano's central crater 
B)  a site on a ridge as opposed to a site in a valley 
C)  a site protected by steep slopes of the volcano 
D)  a site where rocks have been weakened by hot volcanic fluids 
E)  all of these

Question 15

Which of the following lists the four types of volcanoes shaped like hills and mountains?

Accepted Answer

A)  Scoria cone, shield, composite, dome 
B)  Fissure, shield, scoria cone, dome 
C)  Crater, scoria cone, crater, dome 
A)  Scoria cone, shield, composite, dome 
B)  Fissure, shield, scoria cone, dome 
C)  Crater, scoria cone, crater, dome

Question 16

Volcanic eruptions can produce huge floods by:

Accepted Answer

A)  melting ice sheets 
B)  erupting huge quantities of water vapor 
C)  displacing water in lakes 
A)  melting ice sheets 
B)  erupting huge quantities of water vapor 
C)  displacing water in lakes

Question 17

Which of the following are locations where flood basalts are known to have occurred?

Accepted Answer

A)  Siberia 
B)  Brazil 
C)  India 
D)  Ocean plateaus 
E)  All of these 
A)  Siberia 
B)  Brazil 
C)  India 
D)  Ocean plateaus 
E)  All of these

Question 18

The main hazard that Mount Rainier poses to Tacoma and its suburbs is:

Accepted Answer

A)  hot lava flows 
B)  numerous small but deadly pyroclastic flows 
C)  volcanic mudflows 
D)  a hot, glowing lava fountain 
A)  hot lava flows 
B)  numerous small but deadly pyroclastic flows 
C)  volcanic mudflows 
D)  a hot, glowing lava fountain

Question 19

Which of the following materials is NOT produced by erupting volcanoes?

Accepted Answer

A)  sandstone 
B)  basaltic lava 
C)  obsidian/glass 
D)  ash 
A)  sandstone 
B)  basaltic lava 
C)  obsidian/glass 
D)  ash

Question 20

Which of the following hazards is probably NOT associated with this volcano?

Accepted Answer

A)  destruction by fast-moving lava 
B)  pyroclastic flows 
C)  eruption column 
D)  mudflows 
E)  collapse of a volcanic dome 
A)  destruction by fast-moving lava 
B)  pyroclastic flows 
C)  eruption column 
D)  mudflows 
E)  collapse of a volcanic dome

This dark gray igneous rock is glassy and elsewhere contains small vesicles and flow bands. What kind of eruption probably formed this rock?

According to the fossil record, what events have coincided with the approximate times when flood basalts were erupting?

What type of volcano is Mount Rainier?

Composite volcanoes are so called because they:

Earthquakes at Mount St. Helens prior to the major eruption in 1980 were caused by:

What type of volcanic eruption is shown in this photograph?

Which of the following is NOT a typical characteristic of a volcano?

What types of rocks would be most common in the volcano shown in this photograph?

Which of the following is NOT a volcanic hazard made worse by being located along a river valley directly downhill from a volcano?

Which of the following is NOT a characteristic of a volcanic dome?

What type of eruption is shown in this photograph?

Which of the following factors indicates a high risk for volcanic mudflows or lahars?

What type of eruption is shown in this photograph?

Which of the following sites near a volcano might be relatively less dangerous?

Which of the following lists the four types of volcanoes shaped like hills and mountains?

Volcanic eruptions can produce huge floods by:

Which of the following are locations where flood basalts are known to have occurred?

The main hazard that Mount Rainier poses to Tacoma and its suburbs is:

Which of the following materials is NOT produced by erupting volcanoes?

Which of the following hazards is probably NOT associated with this volcano?

The Nature of Geology

Investigating Geologic Questions

Plate Tectonics

Earth Materials

Igneous Environments

Sedimentary Environments

Deformation and Metamorphism

Geologic Time

Seafloor and Continental Margins

Mountains, Basins, and Continents

Earthquakes and Earths Interior

Climate and Weathering

Glaciers, Shorelines, and Changing Sea Levels

Weathering, Soil, and Unstable Slopes

Streams and Flooding

Water Resources

Energy and Mineral Resources

Geology of the Solar System

Filters

Exam 6: Volcanoes and Volcanic Hazards

This dark gray igneous rock is glassy and elsewhere contains small vesicles and flow bands. What kind of eruption probably formed this rock?

According to the fossil record, what events have coincided with the approximate times when flood basalts were erupting?

What type of volcano is Mount Rainier?

Composite volcanoes are so called because they:

Earthquakes at Mount St. Helens prior to the major eruption in 1980 were caused by:

What type of volcanic eruption is shown in this photograph?

Which of the following is NOT a typical characteristic of a volcano?

What types of rocks would be most common in the volcano shown in this photograph?

Which of the following is NOT a volcanic hazard made worse by being located along a river valley directly downhill from a volcano?

Which of the following is NOT a characteristic of a volcanic dome?

What type of eruption is shown in this photograph?

Which of the following factors indicates a high risk for volcanic mudflows or lahars?

What type of eruption is shown in this photograph?

Which of the following sites near a volcano might be relatively less dangerous?

Which of the following lists the four types of volcanoes shaped like hills and mountains?

Volcanic eruptions can produce huge floods by:

Which of the following are locations where flood basalts are known to have occurred?

The main hazard that Mount Rainier poses to Tacoma and its suburbs is:

Which of the following materials is NOT produced by erupting volcanoes?

Which of the following hazards is probably NOT associated with this volcano?

The Nature of Geology

Investigating Geologic Questions

Plate Tectonics

Earth Materials

Igneous Environments

Sedimentary Environments

Deformation and Metamorphism

Geologic Time

Seafloor and Continental Margins

Mountains, Basins, and Continents

Earthquakes and Earths Interior

Climate and Weathering

Glaciers, Shorelines, and Changing Sea Levels

Weathering, Soil, and Unstable Slopes

Streams and Flooding

Water Resources

Energy and Mineral Resources

Geology of the Solar System

Filters