GEOL 201 - Igneous Quiz

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10 Terms

1
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What are the properties of Gabbro?

Color Index: Mafic

Texture: Phaneritic

Origin: Intrusive

2
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What are the properties of Rhyolite?

Color Index: Felsic

Texture: Aphanitic

Origin: Extrusive

3
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What are the properties of Basalt?

Color Index: Mafic

Texture: Aphanitic

Origin: Extrusive

4
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What are the properties of Porphyritic Andesite?

Color Index: Intermediate

Texture: Phorphyritic

Origin: Intrusive/Extrusive

5
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What are the properties of Granite?

Color Index: Felsic

Texture: Phaneritic (Pegmatic)

Origin: Intrusive

6
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What are the properties of Vesicular Basalt (Scoria)?

Color Index: Mafic

Texture: Aphanitic/Vesicular

Origin: Extrusive

7
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What are the properties of Diorite?

Color Index: Intermediate

Texture: Phaneritic

Origin: Intrusive

8
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What are the properties of Pumice?

Color Index: Felsic

Texture: Vesicular/Glassy

Origin: Extrusive

9
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What are the properties of Obsidian?

Color Index: Felsic

Texture: Glassy

Origin: Extrusive

10
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How does the texture relate to origin?

Intrusive: Phaneritic, Pegmatite

Extrusive: Aphanitic, Vesicular, Glassy

Both: Porphyritic