IGNEOUS ROCKS INTRODUCTION.

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Presentation transcript:

IGNEOUS ROCKS INTRODUCTION

Igneous Rocks Definition Rocks Formed From Molten Material.

Igneous Rock Agenda Topics Formation of Igneous Rocks Classification of Igneous Rocks

Formation of Igneous Rocks Source Molten Rock Composition (3 Components) Liquid Solid Volatiles Creation Juvenile Material Remelting Rock Water/Volatile Addition Roll of Temperature and Pressure Location Beneath Surface (Intrusive) Magma Very-slow cooling Large Crystals At Surface (Extrusive) Lava Slow cooling Small Crystals Above Surface (Extrusive) Pyroclastics Very-fast cooling Exposure to air Exposure to water No Crystals

Classification of Igneous Rocks Classification (2 Criteria) Composition Ultramafic Mafic Intermediate Felsic Texture Phaneritic Aphanitic Prophyritic Pegmatitic Glassy Vesicular Pyroclastic

THE END