Volcanic object created when magma hardens within a vent on an active volcano
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An aerial view of the Gros Piton and Petit Piton, in St. Lucia, 2006.
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.[1]
Glacial erosion can lead to exposure of the plug on one side, while a long slope of material remains on the opposite side. Such landforms are called crag and tail. If a plug is preserved, erosion may remove the surrounding rock while the erosion-resistant plug remains, producing a distinctive upstanding landform.
^Huff, W.D.; Owen, L.A. (2013). "Volcanic Landforms and Hazards". Treatise on Geomorphology. 5: 155. doi:10.1016/B978-0-12-374739-6.00089-0. ISBN 9780080885223.
A volcanicplug, 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...
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volcanic landforms Volcanic island – Island of volcanic origin Volcanic plateau – Plateau produced by volcanic activity Volcanicplug – Volcanic object created...
erosion has been extensive, forming a large erosion caldera around the volcanicplug of Mount Warning. Its erosion caldera is the largest in the Southern...
shades of gray, black, and tan. Rock formations in the United States Volcanicplug Diné Bahaneʼ "Ship Rock". Geographic Names Information System. United...
hinterland, Queensland, Australia. The peak is a 439 metres high intrusive volcanicplug and is the highest point and main feature of the Tuchekoi National Park...
rapidly due to the trapped pressure. Sometimes in such an event a lava plug or volcanic neck forms from lava that solidifies inside a volcano's vent, causing...
volcano formed when lava erupts through a thick glacier or ice sheet Volcanicplug – Volcanic object created when magma hardens within a vent on an active volcano...
particularly resistant rock formation (often granite, a volcanicplug or some other volcanic structure). The force of the glacier erodes the surrounding...
longest recorded history of any stronghold in Scotland. It sits on a volcanicplug of basalt known as Dumbarton Rock which is 240 feet (73 m) high and...
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Period, as volcanicplugs of magma which welled up and solidified inside softer rock which has since eroded away.[citation needed] Every plug, with the...
steeper (1:1 gradient) on its north side. Geologically, the law is a volcanicplug of hard phonolitic trachyte rock of Carboniferous (Dinantian) age. It...
Lassen Volcanic National Park is an American national park in northeastern California. The dominant feature of the park is Lassen Peak, the largest plug dome...
that have been eroded by glacial ice. Less common volcanic landforms include cinder cones, volcanicplugs, lava domes and calderas. These diverse formations...
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