Discusses Bowen's Reaction Series, igneous rock forming minerals, and strategies for igneous rock classification.
Wikipedia: Igneous Rock
Hyperlinked overview of igneous rock, which is formed when magma cools and solidifies.
Igneous and Metamorphic Petrology Class Materials
Series of PowerPoint lectures covering topics such as igneous classification, magma generation, mid-ocean ridge basalts, and metamorphic textures and facies.
Rob's Granite Page
About granite, things granitic, and one man's quest for peer recognition.
Minerals & Melts
Software for computational thermodynamics in petrology.
Igneous and Metamorphic Petrology
Images from the High-Resolution X-ray Computed Tomography Facility at the University of Texas at Austin.
Earth Science Lab: Igneous Rock Identification
Includes igneous rock identification chart, information on texture and composition, and pictorial exercise for identifying the rocks.