The name igneous comes from the word ignis, which means "fire" in Latin. Pumice is an example of extrusive igneous rock. The word extrusive means that the magma was forced onto the earth's surface ...

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.

Find out how magma has created igneous rock features with this BBC Bitesize Scotland article for P5, P6, P7 - Second Level CfE ...

For example, the Phanerozoic eon is made up of, from oldest to youngest, the ... keep your eye out for coarse-grained crystalline igneous rocks —you may just be looking at a rock that formed ...

Most of them are illustrated by examples, and as the same rock analysis is used in several, a very fair comparison may be made. ... Nature - A Descriptive Petrography of the Igneous Rocks.

The most common intrusive igneous rock in the area is known as diabase. Diabase is considered a medium-colored igneous rock composed of plagioclase, clinopyroxene, olivine, magnetite and, ilmenite.

Large masses of plutonic rock—such, for example, as the granites of Devon and Cornwall—can be proved by field evidence to fill spaces that must formerly have been occupied by other rocks.

Classification of Igneous Rocks. By H. Warth. Join Our Community of Science Lovers! Sign Up for Our Free Daily Newsletter. Email Address.