volcanic activity

基本解释

Some of the key evidence to be presented at the conference will come from studies of past volcanic activity.
在这个会议上展示的一些关键证据来自于以往对火山活动的研究。
The alternative, that the carbon came from the volcanoes, is unlikely because the spike is much shorter than the period of volcanic activity.
另一种说法是这种碳元素来自于火山，但这不可能，因为碳数量激增期比火山活动期要短得多。
Here, volcanic activity beneath the earth’s crust sends sulfur-rich plumes spewing up from gashes in the seafloor into the ocean, where the plumes support unique ecosystems of animals and microbes.
在这里，地壳以下的火山活动将富含硫磺的烟尘从海底的裂缝中喷出，这些烟尘维系着一些特殊的动物和微生物赖以生存的生态系统。

Volcanic activity broke the large island into pieces that came to the surface of the sea over time.
She found out about the volcanic activity that has shaped the surface of Mars.
Because of volcanic activity, Alaska also has a lot of earthquakes.

One confounding factor is that the late Cretaceous was also a period of great volcanic activity.
ECONOMIST: Mass extinctions