Pumice is an example of extrusive igneous rock. The word extrusive means that the magma was forced onto the earth's surface and cooled in a matter of hours. Granite is an example of intrusive ...

The characteristics of the rocks that hold fossils can be as informative as the fossils themselves. There are three main types of rock: igneous rock, metamorphic rock, and sedimentary rock. Almost all ...

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 ...

There are three main rock types: igneous, sedimentary and metamorphic. These rocks are made of minerals that all have ...

Skull Hill is a type of “float” rock — one that likely originated elsewhere and was transported to its current location.

The film explores the composition and characteristics of rocks and minerals ... The film also covers the formation of different types of rocks—igneous, sedimentary, and metamorphic—and ...