15 Rocks Lab Exam 1

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15 Terms

1
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<p>Dark black, no visible crystals, igneous</p>

Dark black, no visible crystals, igneous

Basalt

2
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<p>Dark colored, large crystals visible, igneous</p>

Dark colored, large crystals visible, igneous

Gabbro

3
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<p>Light colored, large crystals visible, igneous</p>

Light colored, large crystals visible, igneous

Granite

4
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<p>Light/pink, fine-grained, very light density, igneous</p>

Light/pink, fine-grained, very light density, igneous

Rhyolite

5
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<p>Volcanic glass, conchoidal fracture, igneous</p>

Volcanic glass, conchoidal fracture, igneous

Obsidian

6
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<p>Feels like sandpaper, sand grains visible, rust color from iron oxide, sedimentary</p>

Feels like sandpaper, sand grains visible, rust color from iron oxide, sedimentary

Sandstone (iron oxide cement)

7
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<p>Effervesces in acid (calcite), biochemical, sedimentary</p>

Effervesces in acid (calcite), biochemical, sedimentary

Limestone

8
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<p>Fissile (breaks into thin sheets), small grains visible, sedimentary</p>

Fissile (breaks into thin sheets), small grains visible, sedimentary

Shale

9
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<p>Visible gravel-sized grains, sedimentary</p>

Visible gravel-sized grains, sedimentary

Conglomerate

10
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<p>Made of shells cemented together, sedimentary</p>

Made of shells cemented together, sedimentary

Coquina

11
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<p>Strong foliation, alternating light/dark bands, metamorphic</p>

Strong foliation, alternating light/dark bands, metamorphic

Gneiss

12
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<p>Scratches glass, non-foliated, parent rock sandstone, metamorphic</p>

Scratches glass, non-foliated, parent rock sandstone, metamorphic

Quartzite

13
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<p>Effervesces in acid, non-foliated, parent rock limestone, metamorphic</p>

Effervesces in acid, non-foliated, parent rock limestone, metamorphic

Marble

14
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<p>Glittery appearance (mica crystals visible), metamorphic</p>

Glittery appearance (mica crystals visible), metamorphic

Schist

15
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<p>Slaty cleavage, breaks into thin sheets, smooth, metamorphic</p>

Slaty cleavage, breaks into thin sheets, smooth, metamorphic

Slate