Geologic Glossary Definition (English)
Volcanic Rock Defined
The following is in context to Geologic, because it's common for a single word to have multiple meanings you will find additional research links near the bottom of the page.
"Igneous rock that cools and solidifies at or very near the Earth’s surface. Volcanoes produce volcanic rock."
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Additional Volcanic Rock Definition Starting Points
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Expert Dictionary: Volcanic Rock
