Volcanic plug
Videos
A volcanic plug, also called a volcanic neck or lava neck, is a volcanic object created when magma hardens within a vent on an active volcano. When present, a plug can cause an extreme build-up of high gas pressure if rising volatile-charged magma is trapped beneath it, and this can sometimes lead to an explosive eruption. In a plinian eruption the plug is destroyed and ash is ejected.
An aerial view of the Gros Piton and Petit Piton, in St. Lucia, 2006.
Volcanic plug near Rhumsiki, Cameroon.
Roque Bentayga from the town of Artenara
Saint Michel d'Aiguilhe chapel, on top of a volcanic plug in Le Puy-en-Velay, France.
Scawt Hill
Videos
Scawt Hill is a volcanic plug in County Antrim, Northern Ireland, in the borough of Larne, 5 km from the village of Ballygally.
Scawt Hill from the Sallagh Road, Cairncastle
At Scawt Hill, Cretaceous chalk, the white rock to the left of the photo, has been intruded by molten rock which cooled to dolerite, the darker rock to the right
Scawt Hill from Ballygally