Igneous Rocks Note: there is an excellent animation on "Formation and Eruption of Volcanoes" in the Encarta CD-Rom Encyclopedia.
(Igneous Rocks; Note; there is an excellent animation on "Formation and Eruption of Volcanoes" in the Encarta CD-Rom Encyclopedia)
Igneous Rocks
Note
there is an excellent animation on "Formation and Eruption of Volcanoes" in the Encarta CD-Rom Encyclopedia