Question 1

Hot-spot volcanism is likely the result of

Accepted Answer

A)  a subduction zone. 
B)  rifting. 
C)  strike-slip movements. 
D)  a mantle plume. 
E)  none of these 
A)  a subduction zone. 
B)  rifting. 
C)  strike-slip movements. 
D)  a mantle plume. 
E)  none of these

Question 2

How does a dike differ from a sill?

Accepted Answer

Dike is tabular (ver

Question 3

Most igneous rocks are classified by:

Accepted Answer

A)  texture. 
B)  composition. 
C)  size. 
D)  texture and composition. 
E)  composition and size. 
A)  texture. 
B)  composition. 
C)  size. 
D)  texture and composition. 
E)  composition and size.

Question 4

Plutons form within the peaky structure of a volcano.

Accepted Answer

A) True 
 B)False

Question 5

Large crystals found in a fine-grained groundmass can indicate:

Accepted Answer

A)  origin from a magma with an early intrusive phase followed by an extrusive phase. 
B)  origin from a magma with an early extrusive phase followed by an intrusive phase. 
C)  a rock of mixed volcanic-plutonic origin. 
D)  origin from a magma with an early intrusive phase followed by an extrusive phase AND a rock of mixed volcanic-plutonic origin. 
E)  origin from a magma with an early extrusive phase followed by an intrusive phase AND a rock of mixed volcanic-plutonic origin. 
A)  origin from a magma with an early intrusive phase followed by an extrusive phase. 
B)  origin from a magma with an early extrusive phase followed by an intrusive phase. 
C)  a rock of mixed volcanic-plutonic origin. 
D)  origin from a magma with an early intrusive phase followed by an extrusive phase AND a rock of mixed volcanic-plutonic origin. 
E)  origin from a magma with an early extrusive phase followed by an intrusive phase AND a rock of mixed volcanic-plutonic origin.

Question 6

The presence of ____________________, which are incompletely melted pieces of rock within igneous rocks, demonstrates that ____________________ occurs.

Accepted Answer

inclusions

Question 7

Texture of the rock is influenced by the rate of cooling.

Accepted Answer

A) True 
 B)False

Question 8

What are pegmatites, and how do they form?

Accepted Answer

Pegmatites are composed of mostly felsic

Question 9

What are the three major types of magmas? How are they defined? What elements increase or decrease in the composition of the three types?

Accepted Answer

The three types being felsic or granitic

Question 10

Mantle plumes are found primarily at:

Accepted Answer

A)  divergent plate boundaries. 
B)  convergent plate boundaries. 
C)  transform plate boundaries. 
D)  intraplate regions. 
E)  none of the above 
A)  divergent plate boundaries. 
B)  convergent plate boundaries. 
C)  transform plate boundaries. 
D)  intraplate regions. 
E)  none of the above

Question 11

What are dikes, sills, and laccoliths?

Accepted Answer

Dikes and sills are tabular or sheet-lik

Question 12

Explain how a laccolith is similar to a sill.

Accepted Answer

Both are near-surfac

Question 13

When looking at a hand sample of an igneous rock, how would you tell if it is plutonic or volcanic?

Accepted Answer

If you can see individual minerals in th

Question 14

According to the Bowen's reaction series ____________________ is the first ferromagnesian mineral to crystallize from a mafic magma.

Accepted Answer

The answer of According to the Bowen's reaction series ____________________...

Question 15

The only minerals in the continuous branch of Bowen's reaction series are the _________________________.

Accepted Answer

plagioclas

Question 16

Give one reason why rhyolite flows are less common than basalt flows.

Accepted Answer

Rhyolitic magmas are more visc

Question 17

Partial melting of basalt, together with the processes of assimilation, ____________________ settling, and ____________________ mixing, are believed to explain the generation of felsic intrusive magmas from ____________________ magmas.

Accepted Answer

crystal, m

Question 18

How do volcanic necks form?

Accepted Answer

Magma travels from the magma chamber thr

Question 19

What are flood basalts?

Accepted Answer

Flood basalts are va

Question 20

What are the effects of assimilation on magma composition?

Accepted Answer

As magma rises through preexisting rock,

Hot-spot volcanism is likely the result of

How does a dike differ from a sill?

Most igneous rocks are classified by:

Plutons form within the peaky structure of a volcano.

Large crystals found in a fine-grained groundmass can indicate:

The presence of , which are incompletely melted pieces of rock within igneous rocks, demonstrates that occurs.

Texture of the rock is influenced by the rate of cooling.

What are pegmatites, and how do they form?

What are the three major types of magmas? How are they defined? What elements increase or decrease in the composition of the three types?

Mantle plumes are found primarily at:

What are dikes, sills, and laccoliths?

Explain how a laccolith is similar to a sill.

When looking at a hand sample of an igneous rock, how would you tell if it is plutonic or volcanic?

According to the Bowen's reaction series ____________________ is the first ferromagnesian mineral to crystallize from a mafic magma.

The only minerals in the continuous branch of Bowen's reaction series are the _________________________.

Give one reason why rhyolite flows are less common than basalt flows.

Partial melting of basalt, together with the processes of assimilation, settling, and mixing, are believed to explain the generation of felsic intrusive magmas from magmas.

How do volcanic necks form?

What are flood basalts?

What are the effects of assimilation on magma composition?

Understanding Earth: a Dynamic and Evolving Planet

Plate Tectonics: a Unifying Theory

Minerals: the Building Blocks of Rocks

Volcanoes and Volcanism

Weathering, Soil, and Sedimentary Rocks

Metamorphism and Metamorphic Rocks

Earthquakes and Earths Interior

Deformation, Mountain Building, and the Continents

Mass Wasting

Running Water

Groundwater

Glaciers and Glaciation

The Work of Wind and Deserts

Shorelines and Shoreline Processes

Geologic Time: Concepts and Principles

Earth History

Life History

Filters

Exam 4: Igneous Rocks and Intrusive Igneous Activity

Hot-spot volcanism is likely the result of

How does a dike differ from a sill?

Most igneous rocks are classified by:

Plutons form within the peaky structure of a volcano.

Large crystals found in a fine-grained groundmass can indicate:

The presence of ____________________, which are incompletely melted pieces of rock within igneous rocks, demonstrates that ____________________ occurs.

Texture of the rock is influenced by the rate of cooling.

What are pegmatites, and how do they form?

What are the three major types of magmas? How are they defined? What elements increase or decrease in the composition of the three types?

Mantle plumes are found primarily at:

What are dikes, sills, and laccoliths?

Explain how a laccolith is similar to a sill.

When looking at a hand sample of an igneous rock, how would you tell if it is plutonic or volcanic?

According to the Bowen's reaction series ____________________ is the first ferromagnesian mineral to crystallize from a mafic magma.

The only minerals in the continuous branch of Bowen's reaction series are the _________________________.

Give one reason why rhyolite flows are less common than basalt flows.

Partial melting of basalt, together with the processes of assimilation, ____________________ settling, and ____________________ mixing, are believed to explain the generation of felsic intrusive magmas from ____________________ magmas.

How do volcanic necks form?

What are flood basalts?

What are the effects of assimilation on magma composition?

Understanding Earth: a Dynamic and Evolving Planet

Plate Tectonics: a Unifying Theory

Minerals: the Building Blocks of Rocks

Volcanoes and Volcanism

Weathering, Soil, and Sedimentary Rocks

Metamorphism and Metamorphic Rocks

Earthquakes and Earths Interior

Deformation, Mountain Building, and the Continents

Mass Wasting

Running Water

Groundwater

Glaciers and Glaciation

The Work of Wind and Deserts

Shorelines and Shoreline Processes

Geologic Time: Concepts and Principles

Earth History

Life History

Filters

The presence of , which are incompletely melted pieces of rock within igneous rocks, demonstrates that occurs.

Partial melting of basalt, together with the processes of assimilation, settling, and mixing, are believed to explain the generation of felsic intrusive magmas from magmas.