Marcie believes that she has found a piece of obsidian. What causes obsidian to form?

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asked Nov 13, 2021 95.0k views

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Vahid Ghadiri · Answer 1 · 2021-11-19T02:50:09+0000

Obsidian is formed from quickly cooled lava, the formation of obsidian to occurs when felsic lava flow or volcanic dome or when lava cools during sudden contact with water or air.

Marcie believes that she has found a piece of obsidian. What causes obsidian to form?

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