Vicente, volcanic rock.

So, lava tube caves

This is a volcanic ridge.

A number of volcanic islands rise from the center of the sea.

Galapagos is one of the most volcanic places on earth

All that is lava that the volcano spewed forth.

That's it. The town buried in the lava from the volcano, ...and the mine's on the other side.

These forest basins are created by layer on layer of rich volcanic soil packed over porous lava

Well, even in basalt surfaces in lava tube caves, which are a by product of volcanic activity, we find these walls totally covered, in many cases, by these beautiful, glistening silver walls, or shiny pink or shiny red or shiny gold.

There he helped to strengthen the theory that eruptions can be predicted, to some degree, by changes in the makeup of volcanic gases.

By the end of the Late Ordovician these volcanic emissions had stopped.

The volcanic islands tend to be younger, the more westward.

The gas phase is extremely important in propelling volcanic eruptions.

Volcanic cones are among the simplest volcanic landforms.

Do you see the lava?

Tubes form in one of two ways by the crusting over of lava channels, and from pāhoehoe flows where the lava is moving under the surface.

And the future is there for us to use these lava tube caves on Mars.

It was a boom town once. A volcano covered it with lava.

Due to the volcanic nature of the islands, mineral deposits are abundant.

It sits right above the volcanic hotspot in the far west of the archipelago

Trenches are generally parallel to a volcanic island arc, and about from a volcanic arc.

He stopped the volcano's lava during the great eruption of '41.

A third type of volcanic oceanic island is formed over volcanic hotspots.

In addition to typhoons and storms, the Philippines has suffered earthquakes, flash floods and volcanic eruptions.

Survival depends on seizing every opportunity in this volcanic wasteland

But if the pressure gets too much this magma reaches bursting point

The only abrupt worldwide change would have been major asteroid impacts or volcanic super eruptions.

So, lava tube caves I've just told you about organisms that live here on this planet.

Most of this salt was released from volcanic activity or extracted from cool igneous rocks.

The size of the columns is primarily determined by the speed at which lava from a volcanic eruption cools.

(i) Location in relation to hurricanes, cyclones and other tropical storms and or volcanic earthquake fault lines

We have yet to establish the extent of the damage to property, crops and food gardens due to the continuing volcanic activity.

As the Galapagos islands are carried further and further away from their place of birth, the volcanic hotspot there's a remarkable progression

When first erupted from a volcanic vent, lava is a liquid at temperatures from .

The volcano's magma comes from the Hawaii hotspot, which has been responsible for the creation of the Hawaiian island chain over tens of millions of years.

You can walk over the uneroded, black lava flow covered with lava bubbles and tree trunk molds in the surface.

The lake holds Ometepe and Zapatera which are both volcanic islands, as well as the archipelago of the Solentiname Islands.

Volcanic gases include a variety of substances given off by active (or, at times, by dormant) volcanoes.

light we glow in infrared. But lava, a hot piece of iron, or soot in a flame are all hot enough to glow with that familiar red orange light.

So, that gives you an idea of the tectonic events or volcanic events which have happened on that planet.

Well, even in basalt surfaces in lava tube caves, which are a by product of volcanic activity, we find these walls totally covered, in many cases, by these beautiful, glistening silver walls, or shiny pink or shiny red or shiny gold.

Jeju Island, with its black volcanic rock and proximity to Seoul, is a honeymoon destination for many South Koreans.

Named after Surtr, it rose above the ocean in a series of volcanic eruptions between 8 November 1963 and 5 June 1968.

Lava is the molten rock expelled by a volcano during an eruption and the resulting rock after solidification and cooling.

It is present in most igneous rocks and in sediments derived from them (as well as in living things and natural bodies of water).