volcanism(redirected from vulcanism)
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volcanism(vol -kă-niz-ăm) Any of various processes whereby molten material, produced by interior heating, rises along with associated gases through the crust of a planet or satellite and bursts out upon the surface in the form of volcanic eruptions, geysers, etc. Active volcanism, which produces new crustal material, occurs not only on Earth but also on the satellites Io and Triton. Volcanism on the Moon produced the lava of the maria but largely ceased some three billion years ago. Evidence for past volcanism has also been found on Mars (see Mars, volcanoes), Venus, and several outer-planet satellites, such as Europa, Ganymede, Enceladus, Tethys, Ariel, and Titania.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
The movement of magma and its associated gases from the interior into the crust and to the surface of the earth. Also known as volcanicity.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.