Igneous Rocks

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Course 7 Igneous Rocks
Igneous Rocks Formed in Rift
Igneous Rocks Formed Above Subducting Plate
2
Extrusive Igneous Rock
3
Intrusive Igneous Rock
4
Bowens Reaction Series
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Igneous Rock Classification by Composition
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Mafic Rocks
Basalt
Gabbro
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Andesite
Intermediate Rocks
Diorite
8
Granite
Felsic Rocks
Rhyolite
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Peridotite
Ultramafic Rocks
Komatiite
10
Ternary Diagrams
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Modal Classification of Igneous Rocks
Volcanic
Plutonic
Q Quartz A Alkali Feldspar F
Feldspathoids P Plagioclase
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Igneous Textures
Phaneritic texture - granite
Aphanitic texture - basalt
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Igneous Textures
Porphyritic texture - Granite
Volcanic Glass - Obsidian
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Igneous Textures
Volcaniclastic Rock - Pyroclastic Flows
Pegmatite
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Summary of Igneous Rock Texture and Composition
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Continental Large Igneous Provinces
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Geothermal Gradient
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Melting Temperatures (Dry Igneous Rocks)
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Melting Temperatures (Wet Igneous Rocks)
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Decompression melting
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The Role of Water
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Magmatic Differentiation and Assimilation
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The Andesite Line
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Structure of Oceanic Crust and Formation of
Ophiolites