Lecture 3 Rocks and Plate Tectonics B&W

Lecture 3 Rocks and Plate Tectonics B&W - Lecture...

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1 Lecture 3: The Rock Cycle 2 Lecture 3: The Rock Cycle Rock Types Igneous: Sedimentary: Metamorphic: 1 3 Lecture 3: The Rock Cycle Igneous Rocks: Born of fire We are here The Rock Cycle 4 Lecture 3: The Rock Cycle Igneous Rocks 5 Lecture 3: The Rock Cycle form as molten rock cools and solidifies Igneous rocks Magma versus Lava 6 Intrusive Igneous Features
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7 Lecture 3: The Rock Cycle extrusive, or volcanic rocks intrusive, or plutonic rocks Broadly classified based on solidification history Igneous rocks are typically classified by Texture Mineral composition Igneous rocks 8 Lecture 3: The Rock Cycle Factors affecting crystal size and shape Rate of cooling Slow cooling allows crystals to grow larger Classification: Texture Phaneritic Aphanitic Glass 9 Lecture 3: The Rock Cycle Granite: Phaneritic (coarse grained), 25% quartz, 65% feldspar Abundant, associated with mountain building Rhyolite: Aphanitic (fine grained) May contain vesicles (bubbles), glass Less common than granite Compositionally equivalent texturally different Felsic rocks 10
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This note was uploaded on 01/19/2012 for the course EARTH SCIE 1081 taught by Professor Samrussell during the Fall '11 term at UWO.

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Lecture 3 Rocks and Plate Tectonics B&W - Lecture...

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