: volcanic action or activity

Examples of volcanism in a Sentence

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This heat drives more melting and more basaltic volcanism, a process that plays out not just in the minutes-to-hours timescale of the actual collision, but in tens or even hundreds of millions of years afterward. Jacek Krywko, ArsTechnica, 5 July 2026 But deriving a unified theory of volcanism will require a geologic Manhattan Project. Quanta Magazine, 8 May 2026 The vast majority of Venus has been resurfaced by volcanism over the past half-billion years, and more than 85,000 volcanoes have been identified on the Venusian surface in radar images. Keith Cooper, Space.com, 30 Apr. 2026 Rocks nabbed by China’s robotic lunar sample return missions, Chang’e 5 and 6, indicate active volcanism there up until at least two billion years ago. Robin George Andrews, Scientific American, 7 Apr. 2026 See All Example Sentences for volcanism

Word History

First Known Use

1830, in the meaning defined above

Time Traveler
The first known use of volcanism was in 1830

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Cite this Entry

“Volcanism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/volcanism. Accessed 11 Jul. 2026.

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