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volcanism

[vol-kuh-niz-uh m] /ˈvɒl kəˌnɪz əm/
noun, Geology
1.
the phenomena connected with volcanoes and volcanic activity.
Also, vulcanism.
Origin
1865-1870
1865-70; volcan(o) + -ism
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for volcanism
  • Early speculation centered on sudden catastrophe, perhaps volcanism or an earthquake or a deadly hurricane.
  • Climate, volcanism, plate tectonics all played a key role in regulating the oxygen level during various time periods.
  • volcanism has been the prime suspect, because lava flows can fill in and obscure craters.
  • In these setting you can develop bimodal volcanism where both basalt and rhyolite erupt.
  • As the volcanism continued, floral species vanished.
  • The volcanic rift zones have features and lava flows that indicate they have been active through several cycles of volcanism.
  • Evidence for active volcanism in the past, but now geologically inactive.
British Dictionary definitions for volcanism

volcanism

/ˈvɒlkəˌnɪzəm/
noun
1.
those processes collectively that result in the formation of volcanoes and their products
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for volcanism
n.

1869, from French volcanisme; see volcano + -ism.

Online Etymology Dictionary, © 2010 Douglas Harper
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