Revise the characteristics of igneous, ... If magma erupts on the surface as lava, it will form extrusive rock, e.g. basalt. Image caption, Basalt and granite. Characteristics of igneous rocks.

Basalt magmas form by decompression melting of peridotite in the Earth's mantle, a process discussed in the entry for igneous rocks.

Some inquisitive geologists started asking questions about our granite and basalt rocks. Both are igneous. The word igneous comes from the Latin for fire ‘ignis’.This gives us a clue as to ...

A new study from the University of Florida analyzing moon rock samples from a Chinese lunar exploration mission is rewriting ...

A new study reports that volcanic activity forming large flood basalt provinces appears to have been the key driver of Earth's past mass extinctions.

Basalt contains a similar amount of iron to peridotite, an igneous rock common in Earth's mantle but rare in the upper crust. In peridotite, a reaction named serpentinisation produces hydrogen as ...

Igneous rocks are the "new kids" in the rock cycle. They're the new rock on the block, ready to start fresh. Basalt lava flow in Hawaii, a perfect example of an extrusive igneous rock.

The Miocene group consists of a vast series of basalt-rocks with interbedded layers of palagonitic tuff, &c. These rocks, so far as my observations go, exactly resemble those of the Færöe Islands.