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L7 - ROCKSMETAMORPHIC

CIVE 430 ENGINEERING GEOLOGY

SUMMER 2013

METAMORPHISMDEFINITION

Changes in the mineralogy and texture of rocks without melting

Changes happen in the solid state

A metamorphic rock can come from previously unchanged igneous or sedimentary rocks, or a previously metamorphosed rock.

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METAMORPHISMRESULTSIN

Changes in Mineralogy

Changes in Texture Foliation (orientation-micro-bedding-

weakly bonded across layers)

METAMORPHISMAGENTS

Pressure Heat Circulating Fluids Fault Motion

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METAMORPHISMENERGYSOURCES

Agents Providing Heat & Pressure

Convergent Margins Subduction Collision Burial Contact

METAMORPHICENVIRONMENTSCONTACT

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Pressure Metamorphism

PRODUCTS OF METAMORPHISMFOLIATED ROCKS

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PRODUCTSOFMETAMORPHISM

CLASSIFICATIONOFMETAMORPHICROCKSBASEDONTEXTURE

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PRODUCTSOFMETAMORPHISM

PRODUCTSOFMETAMORPHISM

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SLATE

GNEISS

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PRODUCTSOFMETAMORPHISM

MICA-SCHIST

GNEISS

QUARTZITE

SLATE

MARBLE

PRODUCTSOFMETAMORPHISM

MICA-SCHIST

QUARTZITE

SLATE

MARBLE

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PRODUCTSOFMETAMORPHISMSCHIST

PRODUCTS OF METAMORPHISMSCHIST

THIN SECTION POLARIZING MICROSCOPE

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PRODUCTSOFMETAMORPHISMCARRARAMARBLEQUARRY