Question 1

Andesite and ____________________ are respectively, extrusive and intrusive rocks formed in volcanic chains along ____________________ plate boundaries.

Accepted Answer

The answer of Andesite and ____________________ are respectively, extrusive and...

Question 2

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

Accepted Answer

plagioclas

Question 3

The process of assimilation excludes any incorporation of felsic country rock in the newly formed rock.

Accepted Answer

A) True 
 B)False

Question 4

Natural glass such as obsidian forms when ____.

Accepted Answer

A) magma cools too rapidly for crystals to form 
B) pegmatite melts, moves to Earth's surface and ,re-forms 
C) magma cools too slowly for crystals to form 
D) magma has a very low silica content 
E) gas escapes through lava 
A) magma cools too rapidly for crystals to form 
B) pegmatite melts, moves to Earth's surface and ,re-forms 
C) magma cools too slowly for crystals to form 
D) magma has a very low silica content 
E) gas escapes through lava

Question 5

Basalt and gabbro are the rocks that crystallize from mafic magma.

Accepted Answer

A) True 
 B)False

Question 6

Basalt and gabbro are compositional equivalents, which means that they are made up of the same ____________________ but have different ____________________.

Accepted Answer

The answer of Basalt and gabbro are compositional equivalents, which...

Question 7

The increase in Earth's temperature with depth is called the ____________________.

Accepted Answer

The answer of The increase in Earth's temperature with depth...

Question 8

Aphanitic, phaneritic, and porphyritic are terms that indicate ____, respectively.

Accepted Answer

A) fine-grained, course-grained, and mixed grained crystal sizes 
B) formation by fast cooling, slow cooling, and mixed cooling rates 
C) plutonic, volcanic, and mixed plutonic-volcanic origins 
D) course-grained, fine grained, and mixed grained crystal sizes 
E) Mixed-grain, course-grained, and fine-grained crystal sizes 
A) fine-grained, course-grained, and mixed grained crystal sizes 
B) formation by fast cooling, slow cooling, and mixed cooling rates 
C) plutonic, volcanic, and mixed plutonic-volcanic origins 
D) course-grained, fine grained, and mixed grained crystal sizes 
E) Mixed-grain, course-grained, and fine-grained crystal sizes

Question 9

Discuss how Bowen's reaction series helps explain the composition of many igneous rocks.

Accepted Answer

Some minerals occur together in igneous

Question 10

When plutons begin to form and crystallize to form minerals, fluids emanating from them follow cracks and crevasses in adjacent rocks where ____.

Accepted Answer

A) mineral resources such as copper may form 
B) they escape from the atmosphere and cause air pollution 
C) they form volcanic lakes 
D) geologists are able to accurately measure underground temperature 
E) they rupture Earth's surface and form faults 
A) mineral resources such as copper may form 
B) they escape from the atmosphere and cause air pollution 
C) they form volcanic lakes 
D) geologists are able to accurately measure underground temperature 
E) they rupture Earth's surface and form faults

Question 11

The term pegmatite refers to an igneous rock with a particular ____________________ rather than a specific ____________________.

Accepted Answer

texture, c

Question 12

Many geologists now think that hot-spot volcanism results from a rising mantle plume.

Accepted Answer

A) True 
 B)False

Question 13

Most plutons form ____.

Accepted Answer

A) well within plates 
B) from extruded lava 
C) from batholiths 
D) above the land surface 
E) at convergent plate boundaries 
A) well within plates 
B) from extruded lava 
C) from batholiths 
D) above the land surface 
E) at convergent plate boundaries

Question 14

How are subduction and the origin of magma related?

Accepted Answer

Where an ocean plate is subducted beneat

Question 15

Plutons originate through ____ activity.

Accepted Answer

A) extrusive igneous 
B) extrusive volcanic 
C) igneous volcanic 
D) intrusive igneous 
E) intrusive volcanic 
A) extrusive igneous 
B) extrusive volcanic 
C) igneous volcanic 
D) intrusive igneous 
E) intrusive volcanic

Question 16

A key characteristic of igneous rocks is that they ____.

Accepted Answer

A) are the youngest rocks on Earth 
B) are made up of minerals that crystallized from molten rock matter called magma 
C) never contain iron or magnesium 
D) are not as hard as sedimentary rock 
E) always contain more than three different mineral types 
A) are the youngest rocks on Earth 
B) are made up of minerals that crystallized from molten rock matter called magma 
C) never contain iron or magnesium 
D) are not as hard as sedimentary rock 
E) always contain more than three different mineral types

Question 17

Igneous rocks that most likely have a two-stage intrusive-extrusive origin have a(n)____ texture.

Accepted Answer

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

Question 18

Compare and contrast dikes and sills.

Accepted Answer

Dikes and sills are both tabul

Question 19

Crystal settling involves gravitational settling of melted minerals.

Accepted Answer

A) True 
 B)False

Question 20

Both batholiths and stocks are ____.

Accepted Answer

A) mostly discordant 
B) not considered plutons 
C) found in South America 
D) always exposed at the surface via erosion 
E) unable to follow Bowen's reaction series because of their size and depth 
A) mostly discordant 
B) not considered plutons 
C) found in South America 
D) always exposed at the surface via erosion 
E) unable to follow Bowen's reaction series because of their size and depth

Exam 4: Igneous Rocks and Plutons

Andesite and ____________________ are respectively, extrusive and intrusive rocks formed in volcanic chains along ____________________ plate boundaries.

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

The process of assimilation excludes any incorporation of felsic country rock in the newly formed rock.

Natural glass such as obsidian forms when ____.

Basalt and gabbro are the rocks that crystallize from mafic magma.

Basalt and gabbro are compositional equivalents, which means that they are made up of the same ____________________ but have different ____________________.

The increase in Earth's temperature with depth is called the ____________________.

Aphanitic, phaneritic, and porphyritic are terms that indicate ____, respectively.

Discuss how Bowen's reaction series helps explain the composition of many igneous rocks.

When plutons begin to form and crystallize to form minerals, fluids emanating from them follow cracks and crevasses in adjacent rocks where ____.

The term pegmatite refers to an igneous rock with a particular ____________________ rather than a specific ____________________.

Many geologists now think that hot-spot volcanism results from a rising mantle plume.

Most plutons form ____.

How are subduction and the origin of magma related?

Plutons originate through ____ activity.

A key characteristic of igneous rocks is that they ____.

Igneous rocks that most likely have a two-stage intrusive-extrusive origin have a(n)____ texture.

Compare and contrast dikes and sills.

Crystal settling involves gravitational settling of melted minerals.

Both batholiths and stocks are ____.

Understanding Earth: a Dynamic and Evolving Planet

Plate Tectonics: a Unifying Theory

Minerals: The Building Blocks of Rocks

Volcanoes and Volcanism

Weathering, Erosion, and Soil

Sediment and Sedimentary Rocks

Metamorphism and Metamorphic Rocks

Earthquakes and Earthapos;s Interior

Deformation, Mountain Building, and Earthapos;s Crust

Mass Wasting

Running Water--Streams and Rivers

Groundwater

Glaciers and Glaciation

The Work of Wind and Deserts

Oceans, Shorelines, and Shoreline Processes

Geologic Time: Concepts and Principles

Organic Evolution--The Theory and Its Supporting Evidence

Precambrian Earth and Life History

Paleozoic Earth History

Paleozoic Life History

Mesozoic Earth and Life History

Cenozoic Earth and Life History

Filters

Andesite and are respectively, extrusive and intrusive rocks formed in volcanic chains along plate boundaries.

Basalt and gabbro are compositional equivalents, which means that they are made up of the same but have different .

The term pegmatite refers to an igneous rock with a particular rather than a specific .