: 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
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The treatment uses warm basalt and Himalayan stones paired with cool lapis lazuli to relieve deep tension while aligning the body’s energy.
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Katie Lara, Forbes.com, 31 July 2025
They’re paved with black basalt, referred to as sampietrini in Italian.
—Sarah Gearhart, Outside Online, 28 July 2025
Melt inclusions from mare basalts (MI in basalt) are from refs.
—Keith Cooper, Space.com, 16 July 2025
The presence of the ruthenium isotope in the basalt samples indicates that at least some of the rock was formed from material coming from the molten metallic core.
—Jacopo Prisco, CNN Money, 30 May 2025
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Katie Lara, Forbes.com, 31 July 2025
They’re paved with black basalt, referred to as sampietrini in Italian.
—Sarah Gearhart, Outside Online, 28 July 2025
Melt inclusions from mare basalts (MI in basalt) are from refs.
—Keith Cooper, Space.com, 16 July 2025
The presence of the ruthenium isotope in the basalt samples indicates that at least some of the rock was formed from material coming from the molten metallic core.
—Jacopo Prisco, CNN Money, 30 May 2025
See All Example Sentences for basalt
Cite this Entry
“Basalt.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/basalt. Accessed 25 Aug. 2025.
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: a dark gray to black usually fine-grained igneous rock
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