metamorphic rocks rocks.pdftypes of metamorphism •metamorphism- the change that occurs to form...
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Metamorphic Rocks
What are Metamorphic Rocks?
• Metamorphic rocks are rocks that
go through a change or a
metamorphosis.
• Metamorphic Rocks- are changed
as a result of exposure to intense
heat and/or pressure.
Types of Metamorphism
• Metamorphism- the change that
occurs to form metamorphic rocks.
• Two types of metamorphism:
• Contact Metamorphism
• Regional Metamorphism
Contact Metamorphism
• Contact Metamorphism- rocks
come in contact with intense heat.
• When a rock is burned by magma
or lava, the rock changes by the
heat.
Regional Metamorphism
• Regional Metamorphism- rocks
come in contact with intense
pressure.
• When plates collide, the rocks
along that boundary get a lot of
pressure and change.
Example of Metamorphism
• Rocks can constantly change depending on how much heat a pressure they receive.
• Example:
• Shale can become:
• Slate
• Phyllite
• Schist
• Gneiss
Metamorphic Rock Textures
• Foliated
• Have a layered or banded appearance
• Examples: gneiss, phyllite, schist, slate.
• Nonfoliated
• Do not have a layered or banded
appearance.
• Examples: marble and quartzite.
Foliated
Nonfoliated
Classifying Metamorphic Rocks
• Metamorphic rocks vary depending on the region it was found and its composition.
• To identify a metamorphic rock, you classify it based on similarities.
• Texture
• Foliated or nonfoliated
• Composition
• What rocks is it made from.
Watch this Using Your Graphic Organizer
https://www.youtube.com/watch?v=1oQ1J0w3x0o