Chapter 6: Igneous Rocks, Intrusive Activity, and the Origin of Igneous Rocks Visit the Online Learning Centre at

Chapter 6: Igneous Rocks, Intrusive Activity, and the Origin of Igneous Rocks

Visit the Online Learning Centre at www.mcgrawhill.ca/college/plummer

Chapter 6: Igneous Rocks,Intrusive Activity, and theOrigin of Igneous Rocks

What Are Igneous Rocks?What Are Igneous Rocks?How Are Igneous Rocks Classified?How Are Igneous Rocks Classified?

How Does Igneous Activity RelateHow Does Igneous Activity Relate

What Happens When Magma Cools Underground?What Happens When Magma Cools Underground?How Do Different Types of Magma Form?How Do Different Types of Magma Form?

to Plate Tectonics?to Plate Tectonics?



Igneous Rock Apparently IntrudedPre-Existing Rock as Liquid.

Figure 6.2



Classification Chart for the MostCommon Igneous Rocks

Figure 6.4



Relationship of Ship Rock inMexico to the Former Volcano

Figure 6.6b



(A) Cracks Before Intrusion of Magma(B) Concordant Intrusions (Sills) and

Discordant Intrusions (Dikes)

Figure 6.7



Dikes Intruded into Banded Gneiss

Figure 6.8

Photo by N. Eyles



After Erosion, Magma DiapirsFormed into Plutonic Rock are

Exposed as a Batholith and a Stock

Figure 6.10



Diapirs of Magma Travel Upwardfrom the Lower Crust and

Solidify in the Upper Crust

Figure 6.11



Geothermal Gradients atTwo Parts of the Earth’s Crust

Figure 6.13



Melting Temperature of a MineralWith and Without Water Present

Figure 6.14



Melting Temperatures for Mixturesof Quartz and Potassium Feldspar

at Atmospheric Pressure

Figure 6.15



Bowen’s Reaction Series

Figure 6.16



Differentiation of a Magma Body

Figure 6.17



Assimilation

Figure 6.18



Mixing of Magmas

Figure 6.19



Relationships between Rock Types andTheir Usual Plate Tectonics Setting

Table 6.2



Basaltic Oceanic Crust and the Underlying Ultramafic Mantle Rock

Form at a Divergent Boundary

Figure 6.20



Basaltic Oceanic Crust and the Underlying Ultramafic Mantle Rock

Form at a Divergent Boundary

Figure 6.21



Generation of Magma ata Convergent Boundary

Figure 6.22



Young, Hot, Oceanic Lithosphere isBuoyant and Subducts at a Shallow Angle

Figure 6.23



Mafic Magma adds Heat to the LowerCrust, Resulting in Partial Melting

to Form a Granitic Magma

Figure 6.24



Answers to SelectedTesting Your Knowledge

Questions

11.

12.

13.

14.

15.

16.

17.

18.

19.

20.

21.

22.

23.

B

A

D

A

D

C

B

D

B

A

B

C

B



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Laboratory ManualThe Lab Manual to accompany Physical Geology and the Environment has been created as a resource for laboratory sessions in physical geology, mirroring the "Inquiry-Based Approach" of the text. Structured on exercises and corresponding background concepts, the lab manual contains student-friendly worksheets, and has been perforated for easy lab use.

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Chapter 6: Igneous Rocks, Intrusive Activity, and the Origin of Igneous Rocks Visit the Online Learning Centre at