volcanism

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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.

volcanism

[′väl·kə‚niz·əm]
(geology)
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.
References in periodicals archive ?
It is possible that the active vulcanism typical of the Apennines was responsible for its exceptional habitability in the Lower Palaeolithic.
Bintliff on `settlement and territory') and nine case studies, ranging from the effects of the diversification caused by tectonics and vulcanism on human evolution in the African Rift (BAILEY et al.
A central point of our argument is that coincidence between tree-ring anomalies and vulcanism does not necessarily prove causal relationships, especially when major eruptions significantly outnumber frost-ring dates.