Add Yahoo as a preferred source to see more of our stories on Google. Magma becomes lava when it rises up to the Earth’s surface, like when the Nyiragongo volcano erupted in the Democratic Republic ...

Iceland offers some of the Earth's most dramatic sights. And if you head off the beaten path, you can explore some of its lesser-known attractions from ice caves to bubbling lava fields and silent ...

Volcanic rock is an igneous rock of volcanic origin. Volcanic rocks are usually fine-grained or aphanitic to glassy in texture. They often contain clasts of other rocks and phenocrysts. Phenocrysts ...

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Heather Handley is an associate professor of volcanic hazards and geoscience communication in the Department of Applied Earth Sciences at the University of Twente in Enschede, the Netherlands. Unlike ...

Igneous intrusions are a type of rock feature. They form when molten rock cools below the surface of the Earth. Join Isla and Connor as they explore igneous rock landscape features at Traprain Law, ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American In the 18th century the geological ...

The first rock that scientists analyzed on Mars with a pair of chemical instruments aboard the Curiosity rover turned out to be a doozy -- a pyramid-shaped volcanic rock called a "mugearite" that is ...

WANTAGE -- Earlier this month, volcanoes made headlines as the Mount Etna volcano in Sicily, Italy, began belching out fiery hot lava that resulted in an explosion when the lava hit the snow, injuring ...

A "Jurassic World" of volcanoes has been discovered a mile beneath the surface of Earth. Researchers in Australia have found around 100 volcanoes covering an area larger than Delaware. They emerged ...