Igneous rocks close igneous rockIgneous rocks are those which have been formed by the cooling and solidification of molten rock (magma) from underneath the earth’s crust. are formed by magma ...

A compound is a substance that contains two or more elements close elementA pure substance that is made from only one type of atom ... and can form extrusive igneous rocks or intrusive igneous ...

There are three types of rock: igneous ... or at the surface following a volcanic eruption, producing extrusive or volcanic igneous rocks like basalt. As magma cools, the minerals within it ...