What is the most abundant igneous rocks?

Igneous rocks are identified by small or large crystals that are randomly arranged on the surface of the rock. Igneous rocks represent one of three major rock types, which include sedimentary and metamorphic rocks. read more

Basalt is the igneous rock that is most abundant in the oceaniccrust. It is also the most abundant volcanic rock on earth as well. read more

the silica content of magma and lava affects the type of rock that they form. read more

Basalt is a dark extrusive rock. It can be found on the ocean floor, and is the most abundant extrusive rock. read more