GGEOL102: Environment Earth
GGEOL104: Geology of Skyline Drive
GGEOL115: Earth Systems, Cycles, and Human Impacts [Formerly GSCI115]
GEOL110: Physical Geology and Physical Geology Lab
GEOL398: Special Topics: Volcanoes
GEOL399: JMU Geology Field Course in Ireland
My research investigates interactions between the hydrosphere and lithosphere using geochemical techniques. Current projects include: linking the explosive history and magmatic water content of volcanoes, using the crystal chemistry of rutile to trace fluid and oxidation state history in subduction zones and the ancient crust, and evaluating the origin of layering in Mn oxide stream deposits. For more information, visit http://peregrin.jmu.edu/~johns2ea/research.htm.