igneous rock has its name because over 100 years ago a guy named igneous (greek legond) found a rock that hadn't been named or found yet and he named it after his self
The two types of igneous rock are are intrusive and extrusive, depending on where they form. Intrusive igneous rock forms underground from slow cooling magma. Extrusive igneous rock forms at or near...
Felsic and Mafic are two very broad classifications for igneous rocks. This is based on their composition. Felsic rocks are rich in silicon and aluminum (e.g. granite) while Mafic rocks have higher...