: 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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This ocean canyon heaves waves of shale and basalt, quartz and silt.
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Literary Hub, 18 Mar. 2026
Abiqua Falls — known for its 92-foot (28-meter) vertical drop over a columnar basalt cliff — has been privately owned for over a century but open to the public.
—ABC News, 12 Mar. 2026
Magong sits as the main city of Taiwan’s Penghu archipelago, a group of islands in the Taiwan Strait known for striking basalt rock formations, traditional fishing villages, and a noticeably slower pace of life.
—Lauren Dana Ellman, Travel + Leisure, 5 Mar. 2026
Tucked into a valley in the south of Iceland, this 82-foot-long outdoor pool feels as wild as its setting; a concrete haven jutting from the side of the basalt rock cliffs, draped in splotches of moss.
—Lauren Breedlove, Outside, 3 Mar. 2026
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Literary Hub, 18 Mar. 2026
Abiqua Falls — known for its 92-foot (28-meter) vertical drop over a columnar basalt cliff — has been privately owned for over a century but open to the public.
—ABC News, 12 Mar. 2026
Magong sits as the main city of Taiwan’s Penghu archipelago, a group of islands in the Taiwan Strait known for striking basalt rock formations, traditional fishing villages, and a noticeably slower pace of life.
—Lauren Dana Ellman, Travel + Leisure, 5 Mar. 2026
Tucked into a valley in the south of Iceland, this 82-foot-long outdoor pool feels as wild as its setting; a concrete haven jutting from the side of the basalt rock cliffs, draped in splotches of moss.
—Lauren Breedlove, Outside, 3 Mar. 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 24 Mar. 2026.
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: a dark gray to black usually fine-grained igneous rock
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