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igneous rock

Cultural  

  1. Rocks formed by the cooling and solidifying of molten materials. Igneous rocks can form beneath the Earth's surface, or at its surface, as lava.

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Granite, solid volcanic lava, and basalt are examples of igneous rock.

Example Sentences

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Now if you were awake in high school science class, you’re thinking, igneous rock: volcanic lava.

From Los Angeles Times • May 3, 2024

One popular theory suggests that minerals released by the weathering of igneous rock sucked enough carbon dioxide from the atmosphere to set off a deep freeze.

From New York Times • Feb. 7, 2024

Which dark igneous rock is the most common rock formed from volcanic lava?

From Slate • Nov. 16, 2023

That includes igneous rock to date the crater and sedimentary rock and clays that may contain biosignatures, perhaps even fossilized evidence of microbial life.

From Scientific American • Apr. 5, 2023

What relation do they occasionally bear to sheets of igneous rock?

From Geology by Geikie, James

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.