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igneous rock

Cultural

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

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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

Collected in September 2021, the rover’s first sample is thought to be igneous rock from an ancient lava flow.

From Scientific American • Apr. 5, 2023

In the case of several of these mines, igneous rock is near at hand, and the ores are believed to owe their concentration largely to the action of heated waters.

From North America by Russell, Israel C. (Cook)

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