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.

---

Discover More

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

Example Sentences

The molten material solidified into rare igneous rocks known as carbonatites, locking valuable metals into the crust.

From Science Daily

Heavy rare earths are formed over millions of years, as rainfall weathers igneous rocks, breaking them down and leaving elements concentrated near the surface.

From Barron's

In the process they learned that “a mid-crust composed of fractured igneous rocks saturated with liquid water best explains the existing data.”

From Salon

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

From Los Angeles Times

Among the new discoveries was finding primary igneous rocks in Jezero Crater.

From Science Daily