megaplume

English

Etymology

From mega- +‎ plume.

Noun

megaplume (plural megaplumes)

  1. A very large plume or column of water.
    • 1990, Richard Moran, Magill's Survey of Science: Earth Science Series Supplement‎[1], Salem Press, pages 4-5:
      A megaplume is a supermass of extremely hot rocks that moves very slowly under the surface of the earth and influences the breakup of tectonic plates.
    • 1991, Woods Hole Oceanographic Institution, Oceanus, Volume 34, Number 4 Winter‎[2], Woods Hole Oceanographic Institution, page 85:
      The rise height of a buoyant plume increases with the discharge rate of its source fluid, and all previously observed hydrothermal plumes had been found no more than a few hundred meters above their sources. The megaplume reached a stunning 1,000 meters above the ridge axis depth of 2,300 meters.
    • 1995, Richard Moran, The Empire of Ice‎[3], TOR, →ISBN, pages 4-5:
      Taken together, the two pieces of evidence could mean only one thing: the North Atlantic volcanoes were sitting atop a titanic, previously unknown hot spot, a megaplume of superheated magma rising from far down in the earth's mantle.
    • 1997, John E. Simpson, Gravity Currents in the Environment and the Laboratory‎[4], Cambridge University Press, →ISBN, page 138:
      As well as these small continuous sources there exist much larger-scale episodes, which give rise to the so-called ‘megaplumes’.
    • 2000, Joe Buff, Deep Sound Channel‎[5], Bantam Books, →ISBN, pages 311-312:
      "That's what I mean," Use said. "What if we emit an active sonar beam, one that's directionally very tight, at minimum power? Wave it back and forth and grab the micro-echoes off the precipitation particles? That would give a picture of water motion in the megaplume."
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