Also found in: Thesaurus, Medical, Legal, Encyclopedia, Wikipedia.


 (vŏl′kə-nĭz′əm) also vul·ca·nism (vŭl′-)
1. Volcanic force or activity.
2. The phenomena associated with volcanic activity.


(ˈvɒlkəˌnɪzəm) or


(Geological Science) those processes collectively that result in the formation of volcanoes and their products


(ˈvɒl kəˌnɪz əm)

also vulcanism

the phenomena connected with volcanoes and volcanic activity.


the phenomena connected with volcanoes and volcanic activity. Also vulcanism.volcanist, n.
See also: Volcanoes
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.volcanism - the phenomena associated with volcanic activityvolcanism - the phenomena associated with volcanic activity
geological phenomenon - a natural phenomenon involving the structure or composition of the earth
References in periodicals archive ?
Lead author Joseph Byrnes, a geophysicist at the University of Minnesota in Minneapolis, realised something: If the asteroid impact had had a major impact on volcanism at the time, that effect should have shown up in the activity along the Earth's mid-ocean ridges.
As the university points out, volcanism often comes about in places where there is a lot of heat due to one tectonic plate in the Earth's crust squeezing underneath another, a process known as subduction.
39]Ar ages would be available for most of the volcanoes and the revealed space-time pattern of volcanic activity would allow improved hazard estimates as well as a deeper understanding of the causes and controls of volcanism.
In Peshawar Basin and lesser Himalayas this was the time ofrifting and Panjal Volcanism which was continued across the Peninsular-India until Cretaceous.
Dr Sierra Petersen said: "We find the mass extinction was caused by a combination of the volcanism and meteorite impact, a theoretical 'one-two punch'.
The nine contributions that make up the main body of the text are devoted to the Pleistocene megaflood landscapes of the Channeled Scabland, basalt and rhyolite volcanism in the western Snake River Plain of Idaho, the Columbia River Basalt Group of western Idaho and eastern Washington, and many other related subjects.
This investigation has the potential to transform our understanding of mid-ocean ridge volcanism and of Quaternary ice ages.
ISLAMABAD -- A Chinese rover that landed on the Moon's surface two years ago has found tantalising clues to the period of lunar volcanism in 40 years while discovering a new moon rock.
Earthquakes can be linked to small volcanic eruptions, so the Chicxulub impact--which would have caused the equivalent of a magnitude 10 quake or greater--could have shifted Deccan volcanism, Renne says.
Together, the impact and volcanism caused a dramatic change in climate as the sun was blanked out in a "nuclear winter".
Tolstoy connected volcanic activity to the sea level changes, as an increase in sea level creates more pressure at the bottom of the ocean, stifling volcanism.
Courtillot, who is familiar with the Princeton work but had no role in it, led a team that reported in the Journal of Geophysical Research in 2009 that Deccan volcanism occurred in three phases, the second and largest of which coincides with the K-Pg mass extinction.