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Metamorphic Rock Changed Rocks.  I. Origin  A. Existing rock is subducted.  B. Heat and pressure change the rock.  1. Size and shape of grains change.

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Presentation on theme: "Metamorphic Rock Changed Rocks.  I. Origin  A. Existing rock is subducted.  B. Heat and pressure change the rock.  1. Size and shape of grains change."— Presentation transcript:

1 Metamorphic Rock Changed Rocks

2  I. Origin  A. Existing rock is subducted.  B. Heat and pressure change the rock.  1. Size and shape of grains change.  2. Arrangement of grains changes.  3. Minerals can change to new ones.

3  II. Classifying  A. Foliated  1. Grains arranged in parallel layers or bands.  B. Unfoliated  1. Grains arranged randomly.

4

5 NameSub-groupWas originally Use GneissFoliatedGranitenone SlateFoliatedShaleFlooring, chalkboards SchistFoliatedMica rocksProduces garnets Anthracite Coal UnfoliatedBituminous coal Fuel MarbleUnfoliatedLimestoneBuildings, statues

6 NameSub-groupWas originally Use GneissFoliatedGranitenone SlateFoliatedShaleFlooring, chalkboards SchistFoliatedMica rocksProduces garnets Anthracite Coal UnfoliatedBituminous coal Fuel MarbleUnfoliatedLimestoneBuildings, statues

7 Granite becomes Gneiss

8 NameSub-groupWas originally Use GneissFoliatedGranitenone SlateFoliatedShaleFlooring, chalkboards SchistFoliatedMica rocksProduces garnets Anthracite Coal UnfoliatedBituminous coal Fuel MarbleUnfoliatedLimestoneBuildings, statues

9 Shale becomes Slate

10 NameSub-groupWas originally Use GneissFoliatedGranitenone SlateFoliatedShaleFlooring, chalkboards SchistFoliatedMica rocksProduces garnets Anthracite Coal UnfoliatedBituminous coal Fuel MarbleUnfoliatedLimestoneBuildings, statues

11 Mica becomes Schist

12 NameSub-groupWas originally Use GneissFoliatedGranitenone SlateFoliatedShaleFlooring, chalkboards SchistFoliatedMica rocksProduces garnets Anthracite Coal UnfoliatedBituminous coal Fuel MarbleUnfoliatedLimestoneBuildings, statues

13 Bituminous Coal becomes Anthracite Coal

14 NameSub-groupWas originally Use GneissFoliatedGranitenone SlateFoliatedShaleFlooring, chalkboards SchistFoliatedMica rocksProduces garnets Anthracite Coal UnfoliatedBituminous coal Fuel MarbleUnfoliatedLimestoneBuildings, statues

15 Limestone becomes Marble


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