What is a volcanic plug?
Q: What is a volcanic plug?
A: A volcanic plug is a landform created when volcanic magma hardens inside a vent on an active volcano.
Q: What are other names used to describe a volcanic plug?
A: They are sometimes called volcanic necks or puys.
Q: How is a volcanic plug revealed?
A: The plug is revealed when surrounding land is eroded.
Q: What happens if gas-charged magma is trapped beneath a plug?
A: If gas-charged magma is trapped beneath a plug, it may cause an extreme build-up of pressure which sometimes leads to an explosive eruption.
Q: What happens if an explosion does not occur after the formation of a plug?
A: The volcano becomes a solid block made of hard material.
Q: Why is a plug usually harder than the surrounding rock?
A: The plug is usually harder than the surrounding rock because it is made of hardened volcanic magma.
Q: What is a crag and tail?
A: A crag and tail is a landform created by glacial erosion that leads to the exposure of a plug on one side, while a long slope of material remains on the lee side.
