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6/17/2013 1 L5 - ROCKS IGNEOUS CIVE 430 ENGINEERING GEOLOGY SUMMER 2013 How and Where? Solidification Transport Eruption Ponding

Rocks Igneous

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  • 6/17/2013

    1

    L5 - ROCKSIGNEOUS

    CIVE 430 ENGINEERING GEOLOGY

    SUMMER 2013

    How and Where?

    SolidificationTransport

    Eruption Ponding

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    2

    How and Where?

    How and Where?

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    3

    IGNEOUS ROCKS

    IGNEOUS ROCKS

    Intrusive

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    IGNEOUS ROCKSCOMPOSITION

    IGNEOUS ROCKSI. PLUTONIC = Cooling below the surface;

    Slow -> Large CrystalsII. VOLCANIC= Cooling above the surface;

    Rapid-> Small Crystals

    ~50% as high as 72%

    LOW HIGH

    DARK/MAFIC COLOR LIGHT/FELSIC

    PLUTONIC GABBRO DIORITE GRANITEVOLCANIC BASALT ANDESITE RHYOLITE

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    IGNEOUS ROCKS Crystal SizeBASALT GABBRO

    RHYOLITE

    GRANITE

    Granite-Basalt : TEXTURE

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    IGNEOUS ROCKS EXTRUSIVE

    OBSIDIAN

    VOLCANIC ASH

    PUMICE

    IGNEOUS ROCKS EXTRUSIVE

    PUMICE

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    IGNEOUS ROCKS EXTRUSIVE

    PUMICE

    IGNEOUS ROCKS EXTRUSIVE

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    8

    IGNEOUS ROCKSINTRUSIVE

    PUMICE

    COARSE GRANITE

    GABBRO

    IGNEOUS ROCKSINTRUSIVE

    SANDSTONE