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Is obsidian a sedimentary rock igneous rock or a metamorphic rock?

Updated: 11/4/2022

Wiki User

∙ 11y ago

Best Answer

obsidian is an igneous rock, it is not formed from sediment, or a rock going under heat and pressure for the second time it is formed when a volcano erupts and it cools very quickly giving it a smooth glossy surface like glass.

Hugh Luettgen ∙

Lvl 10

∙ 2y ago

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Wiki User

∙ 12y ago

obsidian is an igneous rock, it is not formed from sediment, or a rock going under heat and pressure for the second time it is formed when a volcano erupts and it cools very quickly giving it a smooth glossy surface like glass.

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Wiki User

∙ 11y ago

Obsidian is an extrusive igneous rock, usually a shiny black volcanic glass.

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Continue Learning about Movies & Television

Is obsidian rock metamorphic rock sedimentary or igneous?

Obsidian is an extrusive igneous rock, formed from rapidly cooling lava.

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Obsidian is an igneous rock.

Is obsidian rock metamorphic rock sedimentary or igneous?

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