| Geokem: Online publication with brief descriptions of most types of terrestrial and lunar igneous rocks, their regional distribution and classification, and examples of their geochemical trends and "fingerprints". |
| Greg Finn, Brock University: Page with links to course summaries for Petrology and Petrography, and related coursework. |
| 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. |
| Pegmatite International: Information on the mineralogy and petrology of pegmatites including an online publication and links to pegmatite-related sites. |
| Rob's Granite Page: This site is devoted to granite petrology with an emphasis on the Llano Uplift granites of central Texas. Also includes links to research, meetings and other scientists. |
Classical
