This PowerPoint presentation is part of the Whitman College petrology course. The presentation covers classification of phaneritic igneous rocks, gabbroic rocks, ultramafic rocks, pyroclastic rocks and volcanic rocks using triangular diagrams, and classification of igneous rocks based on total alkalis vs. silica. This resource is part of the Teaching Petrology collection. http://serc.carleton.edu/NAGTWorkshops/petrology03/index.html ... Full description.

This site is the home page for an igneous and metamorphic petrology class at Union College. Features on the page include slide shows, lab exercises, exam study guides, field trip information and photo galleries. Special topics featured on the site include New England igneous and metamorphic rocks, the Skaergaard intrusion, Norwegian eclogites, the Stillwater complex, and Icelandic volcanoes. There ... Full description.

This site provides a comprehensive source of information about thorium. Topics include occurrence, chemical properties, current applications and economics, radiation, government regulations, and control and remediation practices. The site also features links to additional resources with more detailed information about each topic. Full description.

This 27-slide PowerPoint presentation contains a number of schematic diagrams showing continental arc settings. Chemical comparisons of various continental arc magmas are discussed using isotopic variation and the occurrence of rare earth elements. The presentation also covers isotopes, rare earth element characteristics, and the geographic occurrence of plutonic arcs. This resource is part of the ... Full description.

This PowerPoint presentation is part of the Whitman College petrology course. Subjects include fractional crystallization, compaction, flow segregation, volatile transport, the Soret Effect, thermogravitational diffusion, magma mixing, and assimilation. Tectonic-igneous relationships are also addressed. This resource is part of the Teaching Petrology collection. http://serc.carleton.edu/NAGTWorkshops/petrology03/index.html ... Full description.

This site, from the Hawai'i Institute of Geophysics and Planetology, answers commonly asked questions about Martian meteorites, ranging from queries about how meteorites are recognized and discovered, to questions about comparisons of the mineral compositions of rocks from Mars and Earth. The site also addresses the question of why and how thermal emission spectra are used to analyze Martian rocks. ... Full description.

This website is a review tutorial of x-ray crystallography. It serves as a refresher of the subject and gives insight into typical problems relating to this technique. Topics include x-ray diffraction, crystal structure determination, and refinement. Links to short explanations on the related topics of powder diffraction, thermal motion, Bragg's Law, and Fourier synthesis and the phase problem are ... Full description.

This PowerPoint presentation is part of the Whitman College petrology course. The presentation illustrates the structural and field relationships of igneous rocks and igneous processes in pictures, cross-sections, and plan view diagrams. Topics include pyroclastic flows, explosive volcanism, flow area, columnar jointing in basalt, feeder dikes and vents, and numerous other concepts pertaining to igneous ... Full description.

This resource is a journal article about the impacts of minerals on human health. The article presents three recent examples of medical geology studies that illustrate the impacts of minerals and trace elements on human health. Topics covered include exposure to asbestos and soil fungus, hydroxylapatite (the mineral in bones), and exposure to toxic levels of trace elements. Full description.

This site features a presentation about the development of a public health standard for chromium in drinking water in California. The presentation includes useful information about chromium availability, toxicity, and carcinogenic effects. Full description.