vol·​ca·​nism | \ ˈväl-kə-ˌni-zəm How to pronounce volcanism (audio) , ˈvȯl- \

Definition of volcanism

: volcanic action or activity

Examples of volcanism in a Sentence

Recent Examples on the Web But most believed this was an entirely theoretical exercise, partly because, as Shaler noted in his defense of the lunar volcanism theory, the very existence of humanity proved this sort of impact could not have occurred. Cody Cassidy, Wired, 9 Apr. 2021 Yet little is concretely understood about the origins, evolution and behavior of Mars’ volcanism, which is one reason why researchers are excited to use the Geldingadalur eruption as an analogue. Quanta Magazine, 6 Apr. 2021 If the volcanism theory was true, the amount of CO2 released by the volcanic activity would have been massive, flooding the atmosphere with the gas and causing global temperatures to rise as a result. Mike Wehner, BGR, 30 Mar. 2021 This suggests that volcanism wasn’t what triggered the extinction and supports the theory that the asteroid impact was a more likely cause. Mike Wehner, BGR, 30 Mar. 2021 And if there are magma pools or volcanism going on, those areas will be hotter. Ashley Strickland, CNN, 12 Mar. 2021 On Earth, old crust continually melts into the mantle and forms new crust at plate boundaries, recycling water and other molecules back into the atmosphere through volcanism. Mike Wehner, BGR, 16 Mar. 2021 The way a planet loses heat can profoundly shape its surface, governing everything from lava-spewing, atmosphere-changing volcanism to the tectonic heaves that thrust up tall mountains and carve out deep basins. Robin George Andrews, Scientific American, 20 Jan. 2021 The smoking gun was ancient volcanism in what is today Siberia, where volcanoes disgorged enough magma and lava over about a million years to cover an amount of land equivalent to a third or even half of the surface area of the United States. Paul Douglas, Star Tribune, 25 Nov. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'volcanism.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of volcanism

1830, in the meaning defined above

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The first known use of volcanism was in 1830

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Statistics for volcanism

Last Updated

18 Apr 2021

Cite this Entry

“Volcanism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/volcanism. Accessed 12 Jun. 2021.

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More from Merriam-Webster on volcanism

Britannica English: Translation of volcanism for Arabic Speakers

Britannica.com: Encyclopedia article about volcanism


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