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Metamorphic Rocks

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Caused by extreme heat and/or pressure. Regional Metamorphism ... Take out your Handy Dandy Earth Science Reference Tables Page 7. Slate. Phyllite. Phyllite ... – PowerPoint PPT presentation

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Title: Metamorphic Rocks


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

3
Regional Metamorphism
  • Caused by extreme pressure and heat.
  • Happens over wide regions.

4
Contact Metamorphism
  • Caused by contact with extreme heat.

5
  • Meta. rocks will often have foliation or a
    distorted structure.

6
Distorted Structure
7
  • Foliation is a grain to the rock.

8
Types of Foliation
  • Gneissic Foliation- minerals are squished into
    bands.

Zebra Stripes
9
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10
Banding vs. Layers
Bands
Layers
11
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  • Schistose foliation-
  • minerals have been squashed into flakes of mica.

13
A Piece of Schist
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Holey Schist
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  • Slaty foliation-
  • Rock splits into flat, thin layers.

16
  • Take out your Handy Dandy Earth Science Reference
    Tables Page 7.

17
Slate


Phyllite

18
Phyllite


Schist

19
Schist


Gneiss
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