How to use in-sentence of “volcanic activity”:
+ It is partly responsible for the high volcanic activity which has formed the island of Iceland.
+ Since then, no volcanic activity has been recorded.
+ Victoria was the scene of much volcanic activity which started 40 million years ago.
+ The most usual thing that happens is that later volcanic activity pushes lava through strata which were laid down earlier in a sedimentary fashion, or through earlier igneous rocks.
+ But volcanic activity may have caused the extinction event.
