Question 1

What two main parameters are used in the classification of igneous rocks?

Accepted Answer

Compositio

Question 2

How does mafic magma originate from ultramafic rock at a spreading ridge?

Accepted Answer

The first minerals to melt in the magma

Question 3

Igneous rocks with a texture that is so fine-grained that the crystals are too small to see is:

Accepted Answer

A)  aphanitic. 
B)  porphyritic. 
C)  glassy. 
D)  phaneritic. 
E)  pyroclastic. 
A)  aphanitic. 
B)  porphyritic. 
C)  glassy. 
D)  phaneritic. 
E)  pyroclastic.

Question 4

Any individual volcano always erupts magmas of the same type.

Accepted Answer

A) True 
 B)False

Question 5

The discontinuous branch of Bowen's reaction series includes various compositions of plagioclase, from calcium-rich to sodium-rich.

Accepted Answer

A) True 
 B)False

Question 6

The presence of country rock inclusions in an intrusive igneous rock is evidence that the rock underwent the process of ____________________.

Accepted Answer

The answer of The presence of country rock inclusions in...

Question 7

What does a phaneritic (coarse grained) texture tell us about the history of an igneous rock?

Accepted Answer

The magma

Question 8

An igneous rock in which large mineral grains called ____________________ are suspended in a finely crystalline groundmass is referred to as ____________________.

Accepted Answer

phenocryst

Question 9

Aphanitic, phaneritic, and porphyritic are textural terms that:

Accepted Answer

A)  refer to fine-grained, coarse-grained, and mixed-grained crystal sizes, respectively. 
B)  refer to formation by slow cooling, fast cooling, and mixed cooling rates, respectively. 
C)  are indicative of volcanic, plutonic, and mixed plutonic-volcanic origins, respectively. 
D)  refer to fine-grained, course-grained, and mixed-grained crystal sizes, respectively, AND are indicative of volcanic, plutonic, and mixed plutonic-volcanic origins, respectively. 
E)  all of these 
A)  refer to fine-grained, coarse-grained, and mixed-grained crystal sizes, respectively. 
B)  refer to formation by slow cooling, fast cooling, and mixed cooling rates, respectively. 
C)  are indicative of volcanic, plutonic, and mixed plutonic-volcanic origins, respectively. 
D)  refer to fine-grained, course-grained, and mixed-grained crystal sizes, respectively, AND are indicative of volcanic, plutonic, and mixed plutonic-volcanic origins, respectively. 
E)  all of these

Question 10

What are the effects of magma mixing on magma composition?

Accepted Answer

Magmas of different composition coming i

What two main parameters are used in the classification of igneous rocks?

How does mafic magma originate from ultramafic rock at a spreading ridge?

Igneous rocks with a texture that is so fine-grained that the crystals are too small to see is:

Any individual volcano always erupts magmas of the same type.

The discontinuous branch of Bowen's reaction series includes various compositions of plagioclase, from calcium-rich to sodium-rich.

The presence of country rock inclusions in an intrusive igneous rock is evidence that the rock underwent the process of ____________________.

What does a phaneritic (coarse grained) texture tell us about the history of an igneous rock?

An igneous rock in which large mineral grains called are suspended in a finely crystalline groundmass is referred to as .

Aphanitic, phaneritic, and porphyritic are textural terms that:

What are the effects of magma mixing 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

What two main parameters are used in the classification of igneous rocks?

How does mafic magma originate from ultramafic rock at a spreading ridge?

Igneous rocks with a texture that is so fine-grained that the crystals are too small to see is:

Any individual volcano always erupts magmas of the same type.

The discontinuous branch of Bowen's reaction series includes various compositions of plagioclase, from calcium-rich to sodium-rich.

The presence of country rock inclusions in an intrusive igneous rock is evidence that the rock underwent the process of ____________________.

What does a phaneritic (coarse grained) texture tell us about the history of an igneous rock?

An igneous rock in which large mineral grains called ____________________ are suspended in a finely crystalline groundmass is referred to as ____________________.

Aphanitic, phaneritic, and porphyritic are textural terms that:

What are the effects of magma mixing 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

An igneous rock in which large mineral grains called are suspended in a finely crystalline groundmass is referred to as .