Dr. Schmitz’s research and teaching interests encompass an understanding of the
processes associated with the tectonic, geochemical, and thermal evolution of the
continental lithosphere. He works to integrate igneous and metamorphic petrology, major
and trace element geochemistry, radiogenic isotope and geochronological tools, and
thermal and chemical diffusive modeling to probe samples of the continental crust and
underlying lithospheric mantle. His research is also incorporated into his teaching,
which encompasses undergraduate and graduate-level courses in geochemistry, isotope
geology, and geochronology, and their petrologic and tectonic applications. 



Rapid Magma Evolution Constrained by Zircon Petrochronology and 40Ar/39Ar Sanidine Ages for the Huckleberry Ridge Tuff, Yellowstone, USA (with Tiffany A. Rivera, James L. Crowley, and Michael Storey), Geology (2014)

Understanding the time scales of magmatic differentiation, storage, and eruption of large-volume silicic magmas is...



A Middle-Late Ediacaran Volcano-Sedimentary Record from the Eastern Arabian-Nubian Shield, Terra Nova (2014)

The Ediacaran Jibalah Group comprises volcano-sedimentary successions that filled small fault-bound basins along the NW–SE-trending...



New Age Constraints for the Salamanca Formation and Lower Río Chico Group in the Western San Jorge Basin, Patagonia, Argentina: Implications for Cretaceous-Paleogene Extinction Recovery and Land Mammal Age Correlations, Geological Society of America Bulletin (2014)

The Salamanca Formation of the San Jorge Basin (Patagonia, Argentina) preserves critical records of Southern...



Climate- and Eustasy-Driven Cyclicity in Pennsylvanian Fusulinid Assemblages, Donets Basin (Ukraine) (with Rimma R. Khodjanyazova, Vladimir I. Davydov, and Isabel P. Montañez), Palaeogeography, Palaeoclimatology, Palaeoecology (2014)

A model of cyclic recurrence (~ 0.6–1.2 myr) of three fusulinid assemblages in the...



An Ultrasonic Method for Isolating Nonclay Components from Clay-Rich Material (with Gregory D. Hoke and Samuel A. Bowring), Geochemistry, Geophysics, Geosystems (2014)

We present an efficient method for high-volume heavy mineral separation from clay-rich rocks using an...




The Geologic Time Scale 2012 (with Felix M. Gradstein, James G. Ogg, and Gabi M. Ogg), Faculty Authored Books (2012)

The Geologic Time Scale 2012 is the framework for deciphering the history of our planet...



Online Activities for Teaching the Science of Geochronology (with Karen Viskupic, Chareen Snelson, Ross Perkins, and Greg Cossette), Annual Meeting of the Geological Society of America (2011)

We are developing a series of engaging, effective, and usable virtual labs/online activities to teach...