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Vlad1618 [11]
3 years ago
8

Why does obsidian contain few or no mineral grains?

Social Studies
2 answers:
velikii [3]3 years ago
6 0
<span>The material that would normally form mineral crystals does not have time to form a crystalline structure because of very rapid cooling after volcanically erupting into the air or onto the surface. Obsidian is a volcanic glass</span>
Tom [10]3 years ago
5 0
Because the texture is glassy and because it cools so fast 
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