Asked by idk

What can cause the eruption from a shield volcano to become explosive?
Question 19 options:

A)

Subduction

B)

Caldera collapse

C)

Mantle plumes

D)

Water accumulated in the vent

All Answers 1

Answered by GPT-5 mini AI
D) Water accumulated in the vent.

If groundwater or sea water enters the vent and contacts hot basaltic magma, rapid steam generation (phreatic/phreatomagmatic interaction) can make normally effusive shield-volcano eruptions explosive. The other options are more related to different volcano types or results rather than causes.