[Free Registration/Login may be required to access all resource tools.] The composition of magma affects the type of volcanic eruption.

[Free Registration/Login may be required to access all resource tools.] The composition of magma affects the type of volcanic eruption.

[Free Registration/Login may be required to access all resource tools.] Presents igneous rocks, which form from magma, and the two types: dense, dark mafic and less dense, light felsic. Also covers Bowen's Reaction Series.

[Free Registration/Login may be required to access all resource tools.] Factors that determine the composition of an igneous rock.