TUT 4

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Last updated 4:28 AM on 6/27/26
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7 Terms

1
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<p>Slate</p>

Slate

  • Foliated OR non-foliated: Foliated

  • Grain size: Very fine-grained

  • Composition: Variable

  • Characteristics: Dull, breaks along flat layers, red, black & grey

  • Type of metamorphism: Regional metamorphism

2
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<p>Gneiss</p>

Gneiss

  • Foliated OR non-foliated: Foliated

  • Grain size: Medium-course grained (porphyroblasts may be present)

  • Composition: White bands: Quartz Na-rich plag

    Dark bands: Biotide &/or amphibole

  • Characteristics: Bands of light & dark minerals

  • Type of metamorphism: Regional metamorphism

3
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<p><span style="background-color: transparent;">Quartzite</span></p>

Quartzite

  • Foliated OR non-foliated: Non-foliated

  • Grain size: Medium-coarse grained

  • Composition: Quartz, sandstone protolith

  • Characteristics: Scratches glass, Non-acidic, pink, low-key dull

  • Type of metamorphism: Contact metamorphism

4
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<p><span style="background-color: transparent;">Marble</span></p>

Marble

  • Foliated OR non-foliated: Non-foliated

  • Grain size: Medium-coarse-grained

  • Composition: Calcite, limestone protolith

  • Characteristics: Acidic, Soft, pink & white, crystally look

  • Type of metamorphism: Contact metamorphism

5
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<p><span style="background-color: transparent;">Schist</span></p>

Schist

  • Foliated OR non-foliated: Foliated

  • Grain size: Medium-coarse grained (porphyroblasts may be present)

  • Composition: Muscovite & biotide, garnet porphyroblasts

  • Characteristics: Scaly look from larger mica grains (shiny)

  • Type of metamorphism: Regional metamorphism

6
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<p><span style="background-color: transparent;">Soapstone</span></p>

Soapstone

  • Foliated OR non-foliated: Nonfoliated/Foliated

  • Grain size: Fine-grained

  • Composition: Mainly talc, chlorite & amphibole

  • Characteristics: Soft, Waxy, white, green & black

  • Type of metamorphism: Hydrothermal metamorphism at subduction zones

7
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<p><span style="background-color: transparent;">Phylite</span></p>

Phylite

  • Foliated OR non-foliated: Foliated

  • Grain size: Fine-grained (porphyroblasts may be present)

  • Composition: Metallic shine from many mica lined up along flat layers

  • Characteristics: Shiny (looks metallic), Breaks along flat layers, green

  • Type of metamorphism: Regional metamorphism