: a dark gray to black dense to fine-grained igneous rock that consists of basic plagioclase, augite, and usually magnetite
Examples of basalt in a Sentence
Recent Examples on the Web
The addition of crushed silicate rock such as basalt to the soil can improve tree nutrition in two ways, either by stimulating tree growth via directly releasing nutrients into the soil, or by increasing soil PH.
—
Jamie Hailstone,
Forbes.com,
30 June 2026
Millions of years ago, the Yakima River carved its way through basalt lava flows to form the Yakima River Canyon.
—
Terry Ward,
Travel + Leisure,
17 June 2026
The setting was a lush landscape of rice paddies, red basalt soil, the golden sands of the South China Sea beaches and bamboo thickets.
—
Pavlo Fedykovych,
CNN Money,
12 June 2026
The material combines recycled PETG with basalt fiber reinforcement.
—
Kaif Shaikh,
Interesting Engineering,
26 May 2026
See All Example Sentences for basalt
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Jamie Hailstone,
Forbes.com,
30 June 2026
Millions of years ago, the Yakima River carved its way through basalt lava flows to form the Yakima River Canyon.
—
Terry Ward,
Travel + Leisure,
17 June 2026
The setting was a lush landscape of rice paddies, red basalt soil, the golden sands of the South China Sea beaches and bamboo thickets.
—
Pavlo Fedykovych,
CNN Money,
12 June 2026
The material combines recycled PETG with basalt fiber reinforcement.
—
Kaif Shaikh,
Interesting Engineering,
26 May 2026
See All Example Sentences for basalt
Cite this Entry
“Basalt.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/basalt. Accessed 4 Jul. 2026.
Copy CitationKids Definition
: a dark gray to black usually fine-grained igneous rock
Love words? Need even more definitions?
Merriam-Webster unabridged
