📖 what
What is a volcanic plug?
VolcanoesGeology
Quick Answer
A volcanic plug is hardened magma that filled a volcano’s vent and later became exposed after the surrounding rock eroded.
The Full Story
When magma solidifies inside a conduit or vent, it can form a resistant plug of igneous rock. Over time, softer volcanic material around it may erode away, leaving a steep isolated pillar or knob. Some famous plugs, such as Devil’s Tower in Wyoming, are not the remains of a volcano’s cone but are related to intrusive magma. Volcanic plugs often stand out in the landscape because they resist weathering better than surrounding rocks.
Key Facts
1.A plug forms when magma solidifies in a volcanic conduit
2.Erosion can expose the plug as a prominent hill or spire
3.Devil’s Tower is a famous example of a volcanic-related igneous intrusion
YouTube Angle
Suggested video title for this topic:
"The hidden lava core that outlasts the volcano"