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vulcanicity
noun[ U ]
geology specializeduk /ˌvʌl.kəˈnɪs.ə.ti/ us /ˌvʌl.kəˈnɪs.ə.t̬i/
the activity of a volcano(= a mountain with a hole at the top through which hot liquid rock is or has been forced out):
During this period, the eruptions reached their zenith - vulcanicity was less intense during the Triassic period.
This is the only evidence to date for vulcanicity in this region.
This early phase of vulcanicity was accompanied by very rapid subsidence.
The presence of fertile volcanic soils is not a valid reason for situating large populations in the vicinity of active vulcanicity.
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