Question 1

Which site has the lowest hazard for pyroclastic eruptions?

Accepted Answer

A)  1, the suburbs of Tacoma 
B)  2, a valley near the volcano 
C)  3, the flanks of the volcano 
D)  4, the summit of the volcano 
A)  1, the suburbs of Tacoma 
B)  2, a valley near the volcano 
C)  3, the flanks of the volcano 
D)  4, the summit of the volcano

Question 2

What type of eruption formed the volcano in this photograph?

Accepted Answer

A)  fluid lava flows 
B)  viscous lava and pyroclastic eruptions 
C)  lava fountains 
D)  fissure eruptions 
E)  eruptions beneath the seafloor 
A)  fluid lava flows 
B)  viscous lava and pyroclastic eruptions 
C)  lava fountains 
D)  fissure eruptions 
E)  eruptions beneath the seafloor

Question 3

Which of the following is NOT a typical eruption style during the growth of a composite volcano?

Accepted Answer

A)  lava flows 
B)  pyroclastic flows 
C)  tephra falls 
D)  dome formation 
E)  caldera collapse 
A)  lava flows 
B)  pyroclastic flows 
C)  tephra falls 
D)  dome formation 
E)  caldera collapse

Question 4

The most common volcanic rock found in lava flows on composite volcanoes is:

Accepted Answer

A)  andesite 
B)  basalt 
C)  obsidian 
A)  andesite 
B)  basalt 
C)  obsidian

Question 5

This relatively small volcanic feature consists of solidified lava and some volcanic ash. What kind of volcano is it?

Accepted Answer

A)  scoria cone 
B)  shield volcano 
C)  composite volcano 
D)  volcanic dome 
E)  caldera 
A)  scoria cone 
B)  shield volcano 
C)  composite volcano 
D)  volcanic dome 
E)  caldera

Question 6

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

Accepted Answer

A)  scoria and other vesicular basalt 
B)  basalt mostly formed in lava flows 
C)  felsic and intermediate lava flows 
D)  pillow basalts 
E)  none of these 
A)  scoria and other vesicular basalt 
B)  basalt mostly formed in lava flows 
C)  felsic and intermediate lava flows 
D)  pillow basalts 
E)  none of these

Question 7

Which of the following plate boundaries is least likely to produce composite volcanoes?

Accepted Answer

A)  Ocean-ocean convergent boundary with a subduction zone Philippines) 
B)  Ocean-continent convergent boundary with a subduction zone Andes) 
C)  Continent-continent convergent boundary with a high mountain range Himalayas) 
A)  Ocean-ocean convergent boundary with a subduction zone Philippines) 
B)  Ocean-continent convergent boundary with a subduction zone Andes) 
C)  Continent-continent convergent boundary with a high mountain range Himalayas)

Question 8

Which of the following are hypothesized sources of the magma that produces flood eruptions?

Accepted Answer

A)  Melted lithosphere over a mantle plume 
B)  Melted asthenosphere from around the plume in the shallow mantle 
C)  Plume material from deep in the mantle that melts at shallow depths 
D)  All of these 
A)  Melted lithosphere over a mantle plume 
B)  Melted asthenosphere from around the plume in the shallow mantle 
C)  Plume material from deep in the mantle that melts at shallow depths 
D)  All of these

Question 9

This igneous rock contains flattened pieces of pumice and small crystals of quartz and feldspar. What type 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 10

Which of the following rock types is NOT characteristic of volcanic domes?

Accepted Answer

A)  glassy volcanic rocks that are unstable over time 
B)  vesicular basalt with very large holes from dangerous gas 
C)  volcanic breccia formed by fracturing of the outer part of the dome 
D)  mixtures of pieces of the dome and ash from dome collapse 
A)  glassy volcanic rocks that are unstable over time 
B)  vesicular basalt with very large holes from dangerous gas 
C)  volcanic breccia formed by fracturing of the outer part of the dome 
D)  mixtures of pieces of the dome and ash from dome collapse

Question 11

Which site on the island contains the most evidence for a hot and thick pyroclastic flow?

Accepted Answer

A)  the location of Rock 1 
B)  the location of Rock 2 
C)  the location of Rock 3 
D)  the area of the landslide blocks 
E)  the area of the mudflow deposits 
A)  the location of Rock 1 
B)  the location of Rock 2 
C)  the location of Rock 3 
D)  the area of the landslide blocks 
E)  the area of the mudflow deposits

Question 12

Ash layers from the three most recent caldera-forming eruptions at Yellowstone 2.1, 1.3, and 0.64 million years ago) stretch:

Accepted Answer

A)  from Wyoming to Colorado 
B)  from California to Washington, D.C 
C)  from one side of Yellowstone National Park to the other 
D)  from Canada to Mexico 
A)  from Wyoming to Colorado 
B)  from California to Washington, D.C 
C)  from one side of Yellowstone National Park to the other 
D)  from Canada to Mexico

Question 13

Volcanic mudflows lahars) are common on composite volcanoes because:

Accepted Answer

A)  large amounts of rain and snowmelt mix with loose ash on steep slopes 
B)  hot mud commonly erupts from their central craters 
C)  such volcanoes form preferentially in rainy tropical locations 
A)  large amounts of rain and snowmelt mix with loose ash on steep slopes 
B)  hot mud commonly erupts from their central craters 
C)  such volcanoes form preferentially in rainy tropical locations

Question 14

This relatively large, symmetrical volcano contains interlayered lava flow, pyroclastic deposits, and volcanic mudflows. What kind of volcano is it?

Accepted Answer

A)  scoria cone 
B)  shield volcano 
C)  composite volcano 
D)  volcanic dome 
E)  caldera 
A)  scoria cone 
B)  shield volcano 
C)  composite volcano 
D)  volcanic dome 
E)  caldera

Question 15

Which of the following sites has volcanoes related to subduction? A is on an island arc, B is in the Andes, C is near Hawaii, D is along a mid-ocean ridge.

Accepted Answer

A)  A and B 
B)  B and C 
C)  C and D 
D)  A and C 
E)  B and D 
A)  A and B 
B)  B and C 
C)  C and D 
D)  A and C 
E)  B and D

Question 16

When lava flows reach the ocean, they:

Accepted Answer

A)  solidify and add land to an island 
B)  explode and produce layers of ash 
C)  form tubes and continue flowing down to the deepest seafloor 
A)  solidify and add land to an island 
B)  explode and produce layers of ash 
C)  form tubes and continue flowing down to the deepest seafloor

Question 17

What type of eruption formed this felsic volcanic breccia?

Accepted Answer

A)  a pahoehoe lava flow 
B)  a pyroclastic column 
C)  a pyroclastic flow 
D)  a lava that broke apart while it flowed 
E)  a lava fountain 
A)  a pahoehoe lava flow 
B)  a pyroclastic column 
C)  a pyroclastic flow 
D)  a lava that broke apart while it flowed 
E)  a lava fountain

Question 18

A single volcano may produce:

Accepted Answer

A)  Only explosive eruptions 
B)  Only nonexplosive eruptions 
C)  Bothe explosive and nonexplosive eruptions 
D)  Either explosive or nonexplosive eruptions, but never both 
A)  Only explosive eruptions 
B)  Only nonexplosive eruptions 
C)  Bothe explosive and nonexplosive eruptions 
D)  Either explosive or nonexplosive eruptions, but never both

Question 19

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 20

What type of eruption formed the main volcanic features in this figure?

Accepted Answer

A)  fluid lava flows 
B)  large pyroclastic eruptions 
C)  lava fountain 
D)  fissure eruptions 
E)  eruptions beneath the seafloor 
A)  fluid lava flows 
B)  large pyroclastic eruptions 
C)  lava fountain 
D)  fissure eruptions 
E)  eruptions beneath the seafloor

Which site has the lowest hazard for pyroclastic eruptions?

What type of eruption formed the volcano in this photograph?

Which of the following is NOT a typical eruption style during the growth of a composite volcano?

The most common volcanic rock found in lava flows on composite volcanoes is:

This relatively small volcanic feature consists of solidified lava and some volcanic ash. What kind of volcano is it?

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

Which of the following plate boundaries is least likely to produce composite volcanoes?

Which of the following are hypothesized sources of the magma that produces flood eruptions?

This igneous rock contains flattened pieces of pumice and small crystals of quartz and feldspar. What type of eruption probably formed this rock?

Which of the following rock types is NOT characteristic of volcanic domes?

Which site on the island contains the most evidence for a hot and thick pyroclastic flow?

Ash layers from the three most recent caldera-forming eruptions at Yellowstone 2.1, 1.3, and 0.64 million years ago) stretch:

Volcanic mudflows lahars) are common on composite volcanoes because:

This relatively large, symmetrical volcano contains interlayered lava flow, pyroclastic deposits, and volcanic mudflows. What kind of volcano is it?

Which of the following sites has volcanoes related to subduction? A is on an island arc, B is in the Andes, C is near Hawaii, D is along a mid-ocean ridge.

When lava flows reach the ocean, they:

What type of eruption formed this felsic volcanic breccia?

A single volcano may produce:

What type of eruption is shown in this photograph?

What type of eruption formed the main volcanic features in this figure?

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

Which site has the lowest hazard for pyroclastic eruptions?

What type of eruption formed the volcano in this photograph?

Which of the following is NOT a typical eruption style during the growth of a composite volcano?

The most common volcanic rock found in lava flows on composite volcanoes is:

This relatively small volcanic feature consists of solidified lava and some volcanic ash. What kind of volcano is it?

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

Which of the following plate boundaries is least likely to produce composite volcanoes?

Which of the following are hypothesized sources of the magma that produces flood eruptions?

This igneous rock contains flattened pieces of pumice and small crystals of quartz and feldspar. What type of eruption probably formed this rock?

Which of the following rock types is NOT characteristic of volcanic domes?

Which site on the island contains the most evidence for a hot and thick pyroclastic flow?

Ash layers from the three most recent caldera-forming eruptions at Yellowstone 2.1, 1.3, and 0.64 million years ago) stretch:

Volcanic mudflows lahars) are common on composite volcanoes because:

This relatively large, symmetrical volcano contains interlayered lava flow, pyroclastic deposits, and volcanic mudflows. What kind of volcano is it?

Which of the following sites has volcanoes related to subduction? A is on an island arc, B is in the Andes, C is near Hawaii, D is along a mid-ocean ridge.

When lava flows reach the ocean, they:

What type of eruption formed this felsic volcanic breccia?

A single volcano may produce:

What type of eruption is shown in this photograph?

What type of eruption formed the main volcanic features in this figure?

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