Any sites related to Igneous rocks and their study, rather than individual minerals, unless discussed in an entirely igneous setting.
Related categories 1
Sites 2
- Northwest Obsidian Research Lab Offers a variety of analytical services related to obsidian trace element characterization ("sourcing") studies, obsidian hydration studies, and obsidian source studies, primarily in the context of archaeological research.
- Greg Finn, Brock University Page with links to course summaries for Petrology and Petrography, and related coursework.