How to Use magma in a Sentence

magma

noun
  • But no one is sure why the magma moved this way.
    — Quanta Magazine, 27 Mar. 2026
  • Earth’s ocean of magma was full of oxygen.
    — Quanta Magazine, 12 June 2026
  • Earthquakes can give you an idea of just how deep the magma might be.
    — Erik Klemetti, Discover Magazine, 29 Feb. 2024
  • So the caldera could be primed to flood with magma and blow in a human lifetime.
    — Luke Darby, GQ, 13 Oct. 2017
  • Many of those might have been phreatic - that is, steam driven - rather than caused by magma.
    — Erik Klemetti, Discover Magazine, 20 May 2024
  • And the ground began to deform, likely due to flows of magma.
    — Christopher Intagliata, Scientific American, 20 Dec. 2021
  • That day, another noisy flow of magma left the sill and overfilled the dike.
    — Robin George Andrews, Quanta Magazine, 20 Feb. 2024
  • But people were warned to stay away because of the risk from noxious fumes and hot magma.
    — Morgan Coates, Washington Post, 3 Aug. 2022
  • Iceland sits over a volcanic hotspot, where magma comes close to the surface.
    — Stephanie Pappas, Scientific American, 14 Nov. 2023
  • Groundwater flows down through caves and is heated by magma, then pushed up as hot springs.
    — Thomas Phippen, The Know, 13 Nov. 2019
  • Gloeocapsa magma is a type of algae that grows on your roof and tends to look like black stains or streaks.
    — Brett Dvoretz, chicagotribune.com, 10 Apr. 2021
  • This is the process that generates the magma that comes to the surface in the form of lava.
    — Smithsonian Magazine, 3 Jan. 2024
  • The magma below the park is close to the surface, creating the hot springs above.
    — Ashley Dunne, Sunset Magazine, 24 June 2022
  • The quakes are one side effects of the erupting volcano as magma makes its way up to the surface.
    — USA TODAY, 7 May 2018
  • This type of Martian rock was formed by the slow cooling of magma on Mars.
    — Laura Baisas, Popular Science, 16 July 2025
  • These extreme vibrations may have forced more magma than usual out of the cracks in the seafloor.
    — Sophie Weiner, Popular Mechanics, 9 Feb. 2018
  • These will help reveal what kind of magma caused the eruption, Biggs says.
    — Stephanie Pappas, Scientific American, 24 Nov. 2025
  • And in places where the crust split, Martian magma erupted out of fissures.
    — Quanta Magazine, 6 Apr. 2021
  • Whether the plume could cause magma to rise in a vertical stream is still unclear, the researchers added.
    — Chris Ciaccia, Fox News, 21 Mar. 2018
  • The deep crater of the volcano now filled with water sits atop the still-active magma column of molten rock.
    — Literary Hub, 22 Oct. 2025
  • Also, the event might have been triggered by the fact that magma is draining from the summit in the first place.
    — Erik Klemetti, WIRED, 2 July 2009
  • Eighty thousand years ago, hot magma spewed from a volcanic vent and raced across the landscape in an open channel.
    — Jeff Layton, The Seattle Times, 14 June 2017
  • The early Earth’s young magma surface sat gooey and cloaked in steam, too hot to hold liquid seas.
    — Laura Poppick, Rolling Stone, 30 June 2025
  • At this time, the fledgling planet is believed to have had a crust of graphite, floating over a deep magma ocean.
    — Jacopo Prisco, CNN, 1 Aug. 2024
  • This blows the chamber up like a balloon and forces magma into an upper chamber.
    — CNN Money, 2 Sep. 2025
  • The heat around these plumes thins Earth’s crust above, creating cracks and sending out spurts of magma.
    — Matt Benoit, Discover Magazine, 19 Dec. 2023
  • The magma ocean could cause heat to circulate, or a thin layer of rock vapor could help cool the planet.
    — Kerry Breen, CBS News, 12 Dec. 2025
  • Here magma, thin crust, and high-heat flow allow for easy access to underground steam or hot water.
    — Encyclopedia Britannica, 2 Apr. 2026
  • The magma rising from the Earth's mantle flows easily and doesn't hold much gas.
    — Anchorage Daily News, 20 Apr. 2018
  • In volcanic regions, magma can change pressure in cracks deep below the surface.
    — Bay Area News Group, Mercury News, 9 Jan. 2026

Some of these examples are programmatically compiled from various online sources to illustrate current usage of the word 'magma.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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