Discover the wonders of our earth with the Physical Geography DVD Series. This DVD covers igneous rocks, including volcanic rocks; igneous rocks of dykes and sills and plutonic rocks such as granite, syenite, gabbro; and ultramafic rocks. Subjects covered include: where igneous rocks come from; how igneous rocks are classified; where igneous rocks can be found; volcanic rocks; ejected materials from volcanoes including ash and tuff; and more. Grades 9-12. 18 minutes on DVD.
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