Often thought to be a volcanic plug, it is not.

The rock itself is a volcanic plug, which are common in the region.

He moved the telescope a little way up the walls of the volcanic plug, held it there.

It has been described as a volcanic plug by geographers.

The beam reached perhaps half-way down the side of the volcanic plug.

The hill is the second to last in a series of volcanic plugs called the Nine Sisters.

Lizard Head looks like an old eroded volcanic plug.

The guards and dogs were still patrolling the area round the roof of the volcanic plug.

The north-eastern side of the mountain has many old volcanic plugs and craters.

The now uninhabited island is formed from the volcanic plug of an extinct volcano.

At its northern end, he made out a cloven volcanic plug: a double spire of rock.

Geologically speaking it is a large volcanic plug.

Carrickarede island is the best example of a volcanic plug in Northern Ireland.

The main peak is a volcanic plug that was heavily eroded by glaciers in the last ice age.

Borgarvirki is a volcanic plug located in north Iceland.

Volcanic plugs are often easy to spot.

The town's most striking feature is Morro Rock, a 576 foot high volcanic plug.

The island is bisected by a large snowfield, and there is an old volcanic plug toward the north end.

The major stumbling block in the project was a massive volcanic plug known as Elderslie Rock.

It includes a group of volcanic plugs, the largest of which is The Thumb.

They are geologically noteworthy for being volcanic plugs.

So steeply was the car rising on this last section that the volcanic plug itself was now less than fourteen yards away.

We pass some strangely shaped mountains that must have been volcanic plugs poking up through vast panoramas.

The volcanic neck of the vent is now collapsed.

It is a shield volcano with a volcanic neck protruding from the center.

In the distance he could see a vast spread of canyons, mesas, and volcanic necks, all blue with morning light.

It's an old volcanic neck, it's the grand-daddy of all diamond mines.

Sydney is mostly Triassic rock, with a some recent igneous dykes and the volcanic neck.

Ahead loomed a jut of rock: an ancient volcanic neck, so Reith surmised.

The volcanic necks are defined by magmatic-hydrothermal breccias.

The summit crater is plugged by a volcanic neck, and the summit itself is ice capped.

The alkali flats were punctuated by eroded volcanic necks from which jagged walls of old lava radiated.

Volcanoes also erupted in the south of the area and as a result, remains of volcanic necks can be found in the hills around Forkhill.

The Neck gets its name for the type of volcanic feature it is called a volcanic plug or a volcanic neck.

This volcanic neck is formed of basalt and is part of the Mount Taylor volcanic field.

For instance, Devils Tower in Wyoming was thought to be a volcanic neck, but study has revealed it to be an eroded laccolith.

It is surrounded by numerous smaller volcanic centers and volcanic necks with extensive lava-covered mesas and valleys to the south.

Agathla (El Capitan) in Monument Valley, is another prominent volcanic neck in this volcanic field.

The dissection has resulted in removing the smaller cones and exposing many lava conduits or pipes in the form of volcanic necks or buttes.

The use of the rock began after an advertising agent passed Laurel Hill, a volcanic neck, in Secaucus, New Jersey on a train in the 1890s.

A volcanic plug, also called a volcanic neck or lava neck, is a volcanic landform created when magma hardens within a vent on an active volcano.

Though appearing to be the remnant of a volcanic neck, it is now believed to be a tilted and eroded piece of rock overlain by a lava flow.

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.

One pale umber morning the Saschan Islands loomed out of the sea: three ancient volcanic necks surrounded by shelves of detritus where grew groves of psilla, kianthus, candlenut, lethipod.

These rocks have been heavily dissected by erosion and the only evidence remaining of the many volcanoes from which they were erupted are occasional remnants of volcanic necks or plugs which mark former vents.

Natural features in the monument include Pilot Rock, which is a volcanic neck or interior of an extinct volcano, similarly formed as Devils Tower in Wyoming, and the Soda Mountain Wilderness.

A volcanic plug, also called a volcanic neck or lava neck, is a volcanic landform created when magma hardens within a vent on an active volcano.