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Metamorphic rocks

Date post: 21-Jan-2015
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METAMORPHIC ROCKS
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Page 1: Metamorphic rocks

METAMORPHIC ROCKS

Page 2: Metamorphic rocks

WHAT IS A METAMORPHIC ROCK?

• Meta – change; morph - form• Any rock that has changed …• Structure• Mineral alignment• Mineral chemistry

Page 3: Metamorphic rocks

WHAT ARE TYPES OF METAMORPHISM?

• Contact metamorphism• Small, local areas

• Regional metamorphism• Large areas

Page 4: Metamorphic rocks

HOW DO METAMORPHIC ROCKS FORM?

• Heat • From the mantle

• Pressure• From the rock layers above

• Fluids• Water can create liquid minerals• Can change a rocks chemistry

• Strain• Due to the force of stress• Fault zones, for example

Page 5: Metamorphic rocks

HOW ARE METAMORPHIC ROCKS CLASSIFIED?

• Foliated• AKA banded, layered• Gneiss, slate, schist

• Nonfoliated• AKA nonbanded,

nonlayered • Marble, quartzite

Page 6: Metamorphic rocks

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