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8 April, 05:21

Obsidian, pumice, and scoria have fine grained or no visible crystals because they were formed. a) (Cooled fast/Cooled slow) b) (inside/outside) c) (above the Earth's surface/below the Earth's surface) d) intrusive/Extrusive)

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  1. 8 April, 05:28
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    Obsidian, pumice, and scoria have fine grained or no visible crystals because they were formed.

    a) (Cooled fast/Cooled slow)

    b) (inside/outside)

    c) (above the Earth's surface/below the Earth's surface)

    d) (intrusive/Extrusive)
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