This is a volcanic chimney.

It's a volcanic hotspot

These are volcanic stones laid by hand.

The dark areas are lava flows.

Instead of belching out lava, they were belching out big, big bubbles of methane.

In the west, right under the island of Fernandina is a volcanic hotspot

Many of these are composed of volcanoes, and can thus be further classified as volcanic island arcs.

Jan Mayen is a volcanic island in the Arctic Ocean and a part of the Kingdom of Norway.

But what you probably don't know is in the very deep part of the ocean, we have volcanic eruptions.

The islands of Japan are located in a volcanic zone on the Pacific Ring of Fire.

Krakatoa, or Krakatau (), is a volcanic island situated in the Sunda Strait between the islands of Java and Sumatra in Indonesia.

There is tremendous amounts of hydrogen sulfide coming into this cave from volcanic sources and from the breakdown of evaporite minerals below the carbonates in which this cave is formed and it is a completely hostile environment for us.

Samosir, or Samosir Island, is a large volcanic island in Lake Toba, located in the north of the island of Sumatra in Indonesia.

The basalts were originally part of a great volcanic plateau called the Thulean Plateau which formed during the Paleogene.

Amchitka ( ) is a volcanic, tectonically unstable island in the Rat Islands group of the Aleutian Islands in southwest Alaska.

Once a year, the female of the sea turtles crawls up out of the equatorial sea onto the blazing sand beach of a volcanic island to dig a pit in the sand and deposit her eggs there.

On the left you can see a lava tube forming at a recent eruption Mount Etna in Sicily and this is the way these tubes form.

In the caption to the plates French geologist Nicolas Desmarest suggested, for the first time in print, that such structures were volcanic in origin.

The terrain in Pitcairn is of rugged volcanic formation, with a rocky coastline and cliffs lining nearly the entire perimeter of the island, giving no easy access from the sea.

Vulcano () is a small volcanic island in the Tyrrhenian Sea, about north of Sicily and the southernmost of the eight Aeolian Islands.

India has two archipelagos the Lakshadweep, coral atolls off India's south western coast and the Andaman and Nicobar Islands, a volcanic chain in the Andaman Sea.

The main island, of volcanic origin, is almost circular in shape, with an area of 99 square kilometres rising to a central cone of 2,060 metres above sea level.

On a more sombre note, I wish to extend the condolences of my Government, delegation and people to our neighbours in the Pacific, Papua New Guinea and Japan, which have both recently experienced devastating volcanic eruptions.

A maar is a broad, low relief volcanic crater that is caused by a phreatomagmatic eruption i.e., an explosion caused by groundwater coming into contact with hot lava or magma.

There is tremendous amounts of hydrogen sulfide coming into this cave from volcanic sources and from the breakdown of evaporite minerals below the carbonates in which this cave is formed and it is a completely hostile environment for us.

Below the lithosphere you have the least viscous part of the mantle because the temperature is high enough for the rock to melt, but the pressure isn't so big as in the lower part of the mantle that the fluid can actually kind of move past each other. Although it's still pretty viscous, it's still a magma.

A scientific assessment of the seismic activity concluded that although the tremors were volcanic in origin, a significant eruption was not imminent and there was no immediate threat to the population.41

Instead of belching out lava, they were belching out big, big bubbles of methane. And they were creating these volcanoes, and there were flows, not of lava, but of the mud coming out of the Earth but driven by I've never seen this before.

On the issue of natural disasters, being situated in a volcanic and disaster prone region, the Solomon Islands welcomes the Secretary General's call to establish a worldwide early warning system for all natural disasters.

Just two years ago working off Santorini, where people are sunning themselves on the beach, unbeknownst to them in the caldera nearby, we found phenomenal hydrothermal vent systems and more life systems.

For example, volcanoes in Mexico and western North America are mostly in volcanic belts, such as the Trans Mexican Volcanic Belt that extends 900 km from west to east across central southern Mexico and the Northern Cordilleran Volcanic Province in western Canada.

When I'm talking about plastic I'm not talking about the stuff that the case of your cell phone is made up, I'm talking about it's deformable, this rock is deformable because it's so hot and it's somewhat melted it kind of behaves like a fluid.

Onekotan Island ( Japanese 温禰古丹島 Onekotan tō, occasionally Onnekotan tō, ) is an uninhabited volcanic island located near the northern end of the Kuril Islands chain in the Sea of Okhotsk in the northwest Pacific Ocean.

Tristan da Cunha, a round volcanic island with an area of 98 square kilometres, is the most remote inhabited island in the world. Its closest neighbours are St. Helena, 2,334 kilometres to the north, and Cape Town, 2,778 kilometres to the east.

Most of the sand on the Moon, especially and you know when you look at the Moon, there's the dark areas and the light areas. The dark areas are lava flows. They're basaltic lava flows, and that's what this sand looks like, very similar to the sand that you would see in Haleakala.

The name is also used for the surrounding island group comprising the remnants of a much larger island of three volcanic peaks which was obliterated in a cataclysmic 1883 eruption, unleashing huge tsunamis (killing more than 36,000 people) and destroying over two thirds of the island.

Again, discovered by accident. Just two years ago working off Santorini, where people are sunning themselves on the beach, unbeknownst to them in the caldera nearby, we found phenomenal hydrothermal vent systems and more life systems.