volcanic plug
Hardened magma core
A volcanic plug is a mass of solidified lava that fills the vent of an extinct volcano.
When the softer surrounding rock erodes away over millennia, the harder plug remains as a steep, often dramatic landform: Devil's Tower in Wyoming is a famous volcanic plug.
Also called a volcanic neck.
- neckHead-body junction
- dikeWall against flooding
- magmaMolten rock underground
- erosionGradual wearing away
- spireTapering architectural peak
molten rock · basalt · conduit · throat · extinct · monolith · lava · lava dome · chimney · remnant · tower · intrusion · solidified · columnar · butte · igneous · vent · crater
volcanic landform type
volcanic plugvolcanic crater
Depression from eruption
caldera · volcanic cone · volcanic vent · cinder cone · lava tube
volcanic, plug, volcano, volcanoes, volcanism, volcanically, plugs, plugged, plugging