Metamorphic Rocks Metamorphic rocks have been changed from a pre-existing rock. Caused by extreme...

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Metamorphic Rocks

Transcript of Metamorphic Rocks Metamorphic rocks have been changed from a pre-existing rock. Caused by extreme...

Page 1: Metamorphic Rocks Metamorphic rocks have been changed from a pre-existing rock. Caused by extreme heat and/or pressure.

Metamorphic Rocks

Page 2: Metamorphic Rocks Metamorphic rocks have been changed from a pre-existing rock. Caused by extreme heat and/or pressure.

Metamorphic rocks have been changed from a pre-existing rock.Caused by extreme heat and/or pressure.

Page 3: Metamorphic Rocks Metamorphic rocks have been changed from a pre-existing rock. Caused by extreme heat and/or pressure.

Regional Metamorphism

Caused by extreme pressure and heat.Happens over wide “regions”.

Page 4: Metamorphic Rocks Metamorphic rocks have been changed from a pre-existing rock. Caused by extreme heat and/or pressure.

Contact Metamorphism

Caused by contact with extreme heat.

Page 5: Metamorphic Rocks Metamorphic rocks have been changed from a pre-existing rock. Caused by extreme heat and/or pressure.

Meta. rocks will often have foliation or a distorted structure.

Page 6: Metamorphic Rocks Metamorphic rocks have been changed from a pre-existing rock. Caused by extreme heat and/or pressure.

Distorted Structure

Page 7: Metamorphic Rocks Metamorphic rocks have been changed from a pre-existing rock. Caused by extreme heat and/or pressure.

Foliation is a “grain” to the rock.

Page 8: Metamorphic Rocks Metamorphic rocks have been changed from a pre-existing rock. Caused by extreme heat and/or pressure.

Types of Foliation:

Gneissic Foliation- minerals are squished into bands.

“Zebra Stripes”

Page 9: Metamorphic Rocks Metamorphic rocks have been changed from a pre-existing rock. Caused by extreme heat and/or pressure.
Page 10: Metamorphic Rocks Metamorphic rocks have been changed from a pre-existing rock. Caused by extreme heat and/or pressure.

Bands Layers

Banding vs. Layers

Page 11: Metamorphic Rocks Metamorphic rocks have been changed from a pre-existing rock. Caused by extreme heat and/or pressure.
Page 12: Metamorphic Rocks Metamorphic rocks have been changed from a pre-existing rock. Caused by extreme heat and/or pressure.

Schistose foliation- minerals have been squashed into flakes of mica.

Page 13: Metamorphic Rocks Metamorphic rocks have been changed from a pre-existing rock. Caused by extreme heat and/or pressure.
Page 14: Metamorphic Rocks Metamorphic rocks have been changed from a pre-existing rock. Caused by extreme heat and/or pressure.
Page 15: Metamorphic Rocks Metamorphic rocks have been changed from a pre-existing rock. Caused by extreme heat and/or pressure.

Slaty foliation- Rock splits into flat, thin layers.

Page 16: Metamorphic Rocks Metamorphic rocks have been changed from a pre-existing rock. Caused by extreme heat and/or pressure.

Take out your Handy Dandy Earth Science Reference Tables Page 7.

Page 17: Metamorphic Rocks Metamorphic rocks have been changed from a pre-existing rock. Caused by extreme heat and/or pressure.

Slate

Phyllite

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Page 18: Metamorphic Rocks Metamorphic rocks have been changed from a pre-existing rock. Caused by extreme heat and/or pressure.

Phyllite

Schist

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Page 19: Metamorphic Rocks Metamorphic rocks have been changed from a pre-existing rock. Caused by extreme heat and/or pressure.

Schist

Gneiss

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