Question 1

Which site on the island has evidence for collapse of a volcanic dome?

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 2

What types of rocks would be most common in a composite volcano?

Accepted Answer

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

Question 3

What is the interpreted origin for magma that forms flood basalts?

Accepted Answer

A) rapid subduction over tens of millions of years 
B) rapid seafloor spreading that forms pillow basalts 
C) a rising mantle plume 
D) flood waters from melting glaciers 
E) none of these 
A) rapid subduction over tens of millions of years 
B) rapid seafloor spreading that forms pillow basalts 
C) a rising mantle plume 
D) flood waters from melting glaciers 
E) none of these

Question 4

What type of eruption formed this unit composed of volcanic blocks and volcanic ash?

Accepted Answer

A) a fluid basaltic flow 
B) a pyroclastic eruption 
C) a pahoehoe lava flow 
D) a lava fountain 
A) a fluid basaltic flow 
B) a pyroclastic eruption 
C) a pahoehoe lava flow 
D) a lava fountain

Question 5

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 6

Which of the numbered features is a pyroclastic column?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 7

What is a main hazard of this type of volcano?

Accepted Answer

A) hot molten fragments thrown a short distance from the volcano 
B) viscous lava that moves too fast for people to outrun 
C) destruction by moderately fluid lava flows that can flow far from the volcano 
D) relatively small pyroclastic eruptions caused by localized explosions or collapse 
A) hot molten fragments thrown a short distance from the volcano 
B) viscous lava that moves too fast for people to outrun 
C) destruction by moderately fluid lava flows that can flow far from the volcano 
D) relatively small pyroclastic eruptions caused by localized explosions or collapse

Question 8

What tectonic setting is interpreted to be the cause of volcanism at Yellowstone?

Accepted Answer

A) subduction along the coast of the Pacific Northwest 
B) magma that is coming up along a bend in a transform fault 
C) movement of North America over a mantle plume 
D) a large meteorite impact that struck the area 100 years ago 
A) subduction along the coast of the Pacific Northwest 
B) magma that is coming up along a bend in a transform fault 
C) movement of North America over a mantle plume 
D) a large meteorite impact that struck the area 100 years ago

Question 9

Which of the following occurs in a lava tube?

Accepted Answer

A) The surface of the lava flow solidifies to form a roof over the moving lava. 
B) Lava tubes insulate a lava flow,allowing it to flow farther. 
C) If a lava tube drains,it becomes a tube-shaped cave. 
D) All of these. 
A) The surface of the lava flow solidifies to form a roof over the moving lava. 
B) Lava tubes insulate a lava flow,allowing it to flow farther. 
C) If a lava tube drains,it becomes a tube-shaped cave. 
D) All of these.

Question 10

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 11

Some scientists think that Yellowstone could cause a future disaster because:

Accepted Answer

A) the area is part of a caldera 
B) scientists think that magma is still present at depth 
C) past eruptions from Yellowstone carried ash over a huge area of western North America 
D) land near Yellowstone is uplifting in some places and subsiding in others 
E) all of these 
A) the area is part of a caldera 
B) scientists think that magma is still present at depth 
C) past eruptions from Yellowstone carried ash over a huge area of western North America 
D) land near Yellowstone is uplifting in some places and subsiding in others 
E) all of these

Question 12

Which of the following are differences between an eruption column and pyroclastic flow?

Accepted Answer

A) Tephra in an eruption column stays hotter until it reaches the ground. 
B) A pyroclastic flow rises higher into the atmosphere than an eruption column. 
C) Damage from an eruption column is more restricted than a pyroclastic flow. 
D) A pyroclastic flow forms when the gas flux cannot support the column. 
A) Tephra in an eruption column stays hotter until it reaches the ground. 
B) A pyroclastic flow rises higher into the atmosphere than an eruption column. 
C) Damage from an eruption column is more restricted than a pyroclastic flow. 
D) A pyroclastic flow forms when the gas flux cannot support the column.

Question 13

What was the most damaging type of eruption that occurred at Vesuvius in Italy?

Accepted Answer

A) A huge landslide caused a lateral blast that knocked down trees and buildings. 
B) A fast-moving viscous lava flow flowed through the middle of Pompeii. 
C) The volcano was so heavy that it caused part of the island to collapse. 
D) One or more pyroclastic flows hit the city of Pompeii. 
E) None of these. 
A) A huge landslide caused a lateral blast that knocked down trees and buildings. 
B) A fast-moving viscous lava flow flowed through the middle of Pompeii. 
C) The volcano was so heavy that it caused part of the island to collapse. 
D) One or more pyroclastic flows hit the city of Pompeii. 
E) None of these.

Question 14

Which of the following is common in most calderas?

Accepted Answer

A) a large circular depression with steep walls 
B) thick sequences of volcanic ash 
C) rounded mountains that are volcanic domes 
D) all of these 
A) a large circular depression with steep walls 
B) thick sequences of volcanic ash 
C) rounded mountains that are volcanic domes 
D) all of these

Question 15

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 16

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 17

What type of eruption formed this flow-banded rhyolite?

Accepted Answer

A) a viscous 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 viscous 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

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 19

Which of the following sites would most likely have composite volcanoes? 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 20

This dark gray igneous rock is glassy and elsewhere contains small vesicles and flow bands.What type of rock is this?

Accepted Answer

A) basalt 
B) rhyolite or obsidian 
C) welded tuff 
D) volcanic breccia 
A) basalt 
B) rhyolite or obsidian 
C) welded tuff 
D) volcanic breccia

Which site on the island has evidence for collapse of a volcanic dome?

What types of rocks would be most common in a composite volcano?

What is the interpreted origin for magma that forms flood basalts?

What type of eruption formed this unit composed of volcanic blocks and volcanic ash?

What type of eruption formed the volcano in this photograph?

Which of the numbered features is a pyroclastic column?

What is a main hazard of this type of volcano?

What tectonic setting is interpreted to be the cause of volcanism at Yellowstone?

Which of the following occurs in a lava tube?

What type of volcanic eruption is shown in this photograph?

Some scientists think that Yellowstone could cause a future disaster because:

Which of the following are differences between an eruption column and pyroclastic flow?

What was the most damaging type of eruption that occurred at Vesuvius in Italy?

Which of the following is common in most calderas?

What type of eruption is shown in this photograph?

Which site has the lowest hazard for pyroclastic eruptions?

What type of eruption formed this flow-banded rhyolite?

What type of eruption is shown in this photograph?

Which of the following sites would most likely have composite volcanoes? A is on an island arc,B is in the Andes,C is near Hawaii,D is along a mid-ocean ridge.

This dark gray igneous rock is glassy and elsewhere contains small vesicles and flow bands.What type of rock is this?

The Nature of Geology

Investigating Geologic Questions

Plate Tectonics

Earth Materials

Igneous Environments

Sedimentary Environments and Rocks

Deformation and Metamorphism

Geologic Time

The Seafloor and Continental Margins

Mountains, basins, and Continents

Earthquakes and Earths Interior

Climate, weather, and Their Influences on Geology

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

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Exam 6: Volcanoes and Volcanic Hazards

Which site on the island has evidence for collapse of a volcanic dome?

What types of rocks would be most common in a composite volcano?

What is the interpreted origin for magma that forms flood basalts?

What type of eruption formed this unit composed of volcanic blocks and volcanic ash?

What type of eruption formed the volcano in this photograph?

Which of the numbered features is a pyroclastic column?

What is a main hazard of this type of volcano?

What tectonic setting is interpreted to be the cause of volcanism at Yellowstone?

Which of the following occurs in a lava tube?

What type of volcanic eruption is shown in this photograph?

Some scientists think that Yellowstone could cause a future disaster because:

Which of the following are differences between an eruption column and pyroclastic flow?

What was the most damaging type of eruption that occurred at Vesuvius in Italy?

Which of the following is common in most calderas?

What type of eruption is shown in this photograph?

Which site has the lowest hazard for pyroclastic eruptions?

What type of eruption formed this flow-banded rhyolite?

What type of eruption is shown in this photograph?

Which of the following sites would most likely have composite volcanoes? A is on an island arc,B is in the Andes,C is near Hawaii,D is along a mid-ocean ridge.

This dark gray igneous rock is glassy and elsewhere contains small vesicles and flow bands.What type of rock is this?

The Nature of Geology

Investigating Geologic Questions

Plate Tectonics

Earth Materials

Igneous Environments

Sedimentary Environments and Rocks

Deformation and Metamorphism

Geologic Time

The Seafloor and Continental Margins

Mountains, basins, and Continents

Earthquakes and Earths Interior

Climate, weather, and Their Influences on Geology

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