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What does lgneous mean?

Updated: 9/18/2023
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13y ago

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Igneous is from the Latin for 'from fire'. The same root as for ignite.

Igneous rocks are classed in two types, volcanic which erupt on the surface and then crystallize, and plutonic, such as granite, which crystallize under the surface.

For each volcanic rock there is a corresponding plutonic, as judged by their chemistry.

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13y ago
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