Twice in recent years Nyiragongo's eruptions have sent molten rock flowing toward the city.
A nearby volcano erupted violently, sending out a hail of molten rock and boiling mud.
rising molten rock flows out on the ocean floor and caps the fissures, trapping the water.
Scientists believe the magma chambers-or reservoirs of molten rock-under dormant volcanoes are filled with sticky, viscous mush.
Scientists believe that these are parts of volcanoes that were formed when molten rock pushed upward through the earth’s crust.
Such heat and pressure exist only in the hot, liquid mass of molten rock deep inside the earth.
Similar flows of molten rock have built up the Hawaiian islands over the course of more than 70 million years.
More than two billion cubic metres of rising molten rock - magma - had seeped into a crack between the African and Arabian tectonic plates, forcing them further apart.
A geyser of lava erupted, dropping molten rock on one of the outrigger collection arms of the facility where Obi-Wan and Vader dueled.
As the sides of the Ethiopian rift move apart, the gap between them is being plugged with molten rock, which then cools to form new land.
Her models show that a large percentage of the water in the molten rock would quickly form a steam atmosphere before cooling and condensing into an ocean.
The lava that flows slowly like a wave down the mountain causes far more damage because it buries everything in its path under the molten rock.
Renewed fears of an eruption came as vast quantities of magma - the molten rock from just under the earth's crust - began bubbling into the sea off the port of La Restinga.
Deep inside the Earth are very hot molten rocks called lava.
Before it cooled, there was a so-called magma ocean on the Moon's surface - molten rocks, capable of retaining high quantities of water.
