AIM: How are metamorphic rocks formed, classified and used? OBJ: Given notes and activity sheet SWBAT explain how metamorphic rocks are formed, classified and used with 70% accuracy DN: HW Check- WEDS Activity Sheet (distribute Answer Key); Watch video

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AIM How are metamorphic rocks formed, classified
and used?OBJ Given notes and activity sheet
SWBAT explain how metamorphic rocks are formed,
classified and used with 70 accuracyDN HW
Check- WEDS Activity Sheet (distribute Answer
Key) Watch video https//www.youtube.com/watch?v
kRUwchlza88 ACT Introduction to Metamorphic
Rocks (Notes)Text, read p. 160-162 Complete
Metamorphic Rocks Activity SheetHW Complete
Metamorphic Rocks Activity Sheet Minerals
Rocks Exam, March 20.
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Metamorphic Rocks

• Metamorphic change form heat pressure deep
  beneath Earths surface can change any rock into
  a metamorphic rock.
• Metamorphism occurs
• 1) At the site of plate collision (subduction)
• 2) Within the core of mountains
• 3) Near rising magma plumes.

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Types of Metamorphic Rocks High Temperature
changes the size shape of the grains or mineral
crystals ( recrystallization). Extreme Pressure
squeezes rock so tightly that mineral grains
/crystals line up in flat, parallel layers.
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Metamorphic Rocks

• Metamorphic Rocks are classified based on the
  arrangement of the grains (crystals)
• Foliated Rocks the crystals are arranged in
  parallel layers or bands.
• Nonfoliated Rocks the mineral grains are
  arranged randomly and grain (crystal) size has
  increased ( recrystallization). These rocks are
  extremely hard.

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• original rock ? metamorphic rock
• shale ? slate
• granite ? gneiss
• sandstone ? quartzite
• limestone ? marble

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Granite Metamorphism
Gneiss
Limestone Metamorphism Marble
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Shale Metamorphism Slate
Limestone Metamorphism Marble
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High Grade
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Metamorphic Settings
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• Uses of Metamorphic Rock
• Building slate flooring, walkways, chalkboard,
  marble
• Sculpture marble Lincoln Memorial