PhD, Earth Science, 2015, Montana State University
MS, Geology (Igneous Petrology), 2009, New Mexico State University
BS, Geology, 2007, Eastern Michigan University
Commissioned Officer (Engineer), U.S Army and Army National Guard (2000-2021)
Environmental Geologist (2006-2008)
Teaching
GLG 332 Mineralogy with Lab
GLG 333 Igneous and Metamorphic Petrology with lab
GLG 355 Volcanology
GLG 360 Directed Field Trips
GLG 597 Field Volcanology of the Central Andes, Chile
GLG 715 Isotope Geochemistry
GEO 700 Intro to Graduate Study
Graduate Student Thesis Mentoring
Research and professional interests
Igneous trace element and isotope geochemistry
Volcanology
Mineral chemistry
Tracking magma storage and accumulation in the Central Andes (2020-2024)
Geologic and magmatic evolution of the Mogollon Datil Volcanic Field, New Mexico (ongoing)
Magma source and timescales of monogenetic volcanic systems in the Pribilof Islands, Alaska
Tectono-magmatic evolution of the Mesoproterozoic St. Francois terrane, SE Missouri
Selected Publications
Aguilera, F.; Grosse, P.; Guzman, S.; Michelfelder, G.S.; and Taussi, M., 2023, Editorial: Volcanism in the Central Volcanic Zone of the Andes: Frontiers in Earth Science, v. 11, paper 1130976. doi: 10.3389/feart.2023.1130976
Michelfelder, G.S., 2021, Petrology and volcanology of the Mesoproterozoic igneous rocks of the Saint Francois Mountains Terrane, southeast Missouri, USA, in Florsheim, J., Koeberl, C., McKay, M.P., and Riggs, N., eds., Field Excursions from the 2021 GSA Section Meetings: Geological Society of America Field Guide 61, p. 253–289, https://doi.org/10.1130/2021.0061(11).
Michelfelder, G.S., Horkley, L.K., Reinier, C.* and Hudson, S.R*, 2021, Variation in Olivine Trace Element Contents Reveal the Signature of Deep Mantle Melting During the Eruption of the McCartys Flow, Zuni-Bandera Volcanic Field, New Mexico, in: Frey, B.A.; Kelley, S.A.; Zeigler, K.E.; McLemore, V.T.; Goff, F.; Ulmer-Scholle, D.S., eds., New Mexico Geological Society 72nd Annual Fall Field Conference Guidebook: Geology of the Mount Taylor area,, p. 141-152. https://doi.org/10.56577/FFC-71.141
Rentz, S.P., Michelfelder, G., Coble, M.A., and Salings, E., 2019, U-Pb zircon geochronology of calc-alkaline ash flow tuff units in the Mogollon Datil Volcanic Field, southern New Mexico: Geological Society of America Special Paper 528, p. 409–434. doi.org/10.1130/2018.2538(19)
Hoffman, M.* and Michelfelder, G.S., 2018, Andesite hybridization of the Mogollon Datil volcanic Field: Insights from oxygen isotope values from the Uvas Volcanic Field and the Rubio Peak Formation: New Mexico Geological Society Guidebook: Las Cruces Country III, vol. 69, Mack, G.H.; Hampton, B.A.; Ramos, F.C.; Witcher, J.C.; and Ulmer-Scholle, D.S. (eds.), p 189-196. https://doi.org/10.56577/FFC-69.189
Awards and honors
Faculty Excellence in Research Award, College of Natural and Applied Sciences, Missouri State University, April 2016
Faculty Excellence in Research Award, College of Natural and Applied Sciences, Missouri State University, April 2021
Professional organizations
International Association of Volcanology and Chemistry of the Earth's Interior
American Geophysical Union
Geological Society of America
Mineralogical Society of America
New Mexico Geological Society
International Association of GeoAnalysts, National Association of Geoscience Teachers, Society of Economic Geologists, and Tobacco Root Geological Society