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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.
The 581-foot (177 m) [1] Morro Rock is one of 13 volcanic plugs (remnant necks of extinct volcanoes), lava domes, and sheetlike intrusions between Morro Bay on the north and Islay Hill on the south, all in San Luis Obispo County. [8] It is composed mostly of dacite, an igneous, volcanic rock.
This volcanic neck is formed of basalt and is part of the Mount Taylor volcanic field. A volcanic neck or plug is formed when magma from an existing volcano solidifies in the pipe or neck and the surrounding sediment is eroded away. [5] Marine Cretaceous rocks of the Mancos Shale and Point Lookout Sandstone are exposed around the base of ...
Huerfano Butte (/ ˈ w ɛər f ə n oʊ /; Spanish pronunciation:) is a volcanic plug [5] or hypabyssal plug [6] located 8.8 miles (14.1 km) north of Walsenburg in Huerfano County, Colorado, United States.
Agathla Peak is an eroded volcanic plug consisting of volcanic breccia cut by dikes of an unusual igneous rock called minette. It is one of many such volcanic diatremes that are found in Navajo country of northeast Arizona and northwest New Mexico.
The Nut is a volcanic plug near the town of Stanley, Tasmania. [3] [4] [5] It is formed from basanite dated to 12.5 and 8.5 million years old [6], the remains of the solidified core of an extinct volcano that was active about 25–70 million years ago.
Then, on Jan. 15, that volcano destroyed them. Located in the South Pacific, the eruption was one of the most powerful ever captured on satellite. The size and fury of the resulting plume made a ...
A volcanic fissure and lava channel with lava fountain Channel of lava erupted during a fissure eruption of Kīlauea volcano, Hawaii, 2007 Eruption fissure with spatter cones, Holuhraun, Iceland, 2014 Mauna Loa with different lava flows and fissure vent A volcanic fissure eruption on Fagradalsfjall, Iceland, 2021 Crater row of Laki Eldhraun, a lava field produced by the Laki craters Cinder ...