volcanism

His study of eruptions over the past 300 years with Ben Mason of the University of Cambridge and colleagues reveals that volcanism varies with the seasons..他和剑桥大学的本.梅森及其同事研究了过去300年来发生的火山喷发，研究显示火山活动随季节变化而不同。

Both kinds of plate boundary are associated with fault systems, earthquakes and volcanism, but the kinds of geologic activity observed at the two boundaries are quite different..两种板块边界均与地层系统、地震以及火山活动有关，但在两种边界处观察到的诸般地质活动 却迥然不同。