Magma

What is Magma?

Magma meaning Naturally occurring molten rock, generated within the earth and capable of intrusion and extrusion, from which igneous rocks are thought to have been derived through solidification and related processes. It may or may not contain suspended solids (such as crystals and rock fragments) and/or gas phases.

 

reference: Glossary – U.S. Energy Information Administration (EIA)

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