volcanicity

基本解释

The city was slain by the volcanicity.
被火山活動燬滅的城市。
chazidian.com
Volcanicity supplies material condition, migration pathway and migration agent for generation of inorganic CO2, So volcanic gas reservoir is often rich in CO2.
火山巖氣藏普遍高含CO2的原因是：火山巖活動爲無機CO2的生成提供了物質條件、運移通道和運移動力；
lib.swpu.edu.cn
The rifting magmatic action is mostly bimodal volcanicity in volcanic grabens located at both sides of the CSTZ formed and the synchronous magmatic irruption is also bimodal posture .
裂穀巖漿活動主要爲兩側火山地塹發育的雙峰式火山活動，同期的巖漿侵入活動也呈雙峰態勢。