: 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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Different colors of sand come from different minerals, like khaki feldspar, smoky white quartz, green olivine or black basalt.
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David R. Montgomery, Discover Magazine, 12 July 2024
The project consisted of laying 7,000 black basalt stones in a pile outside the Fridericianum museum.
—Jessica Gelt, Los Angeles Times, 11 July 2024
No matter the adventure in the park, you’ll also be surrounded by some of the most spectacular rocks on the planet, including black basalt, glass-like gypsum, and selenite crystal.
—Nina Kokotas Hahn, Condé Nast Traveler, 18 May 2023
Hydrothermally altering your typical basalt will produce magnesium and calcium-rich hydrated minerals like those observed in the Bennu sample.
—Erik Klemetti, Discover Magazine, 27 June 2024
See all Example Sentences for basalt 
David R. Montgomery, Discover Magazine, 12 July 2024
The project consisted of laying 7,000 black basalt stones in a pile outside the Fridericianum museum.
—Jessica Gelt, Los Angeles Times, 11 July 2024
No matter the adventure in the park, you’ll also be surrounded by some of the most spectacular rocks on the planet, including black basalt, glass-like gypsum, and selenite crystal.
—Nina Kokotas Hahn, Condé Nast Traveler, 18 May 2023
Hydrothermally altering your typical basalt will produce magnesium and calcium-rich hydrated minerals like those observed in the Bennu sample.
—Erik Klemetti, Discover Magazine, 27 June 2024
See all Example Sentences for basalt
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“Basalt.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/basalt. Accessed 26 Jul. 2024.
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: a dark gray to black usually fine-grained igneous rock
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