Much of my current research includes work with Dr. Johnny Waters (Appalachian State University) and Dr. Peter Königshof (Senckenberg Natural History Museum) and a variety of US-based and international geoscientists and students on geochemical changes preserved in sediments during mass extinctions.
Our team is known as the DAGGER (Devonian Anoxia, Geochemistry, Geochronology, and Extinction Research) group, and our field sites are in China, Mongolia, Vietnam, Iran, the USA and throughout Europe. Much of our work has stemmed from UNESCO's International Geoscience Programme (IGCP) Project 596 on Mid-Paleozoic Climate and Biodiversity.
For more information about the DAGGER group, visit http://devonian.appstate.edu, and you can follow us on Instagram at (@365millionyears).
My new research direction hits close to home - literally. My property was severely damaged by flooding during Hurricane Helene and this new project was inspired by what I witnessed during the storm. This project seeks to quantify how soils have changed across different flooded landscapes within the High Country of North Carolina. This is an interdisciplinary geomicrobiology and soil science research project that involves Dr. Suzanna Bräuer and Dr. Ashley Adams in the Department of Biology, Dr. Brooke Hunter in Geological and Environmental Sciences, and Dr. Alexia Witcombe in the Department of Sustainable Development.
My other primary research direction is interdisciplinary geomicrobiology research with Dr. Suzanna Bräuer in the Department of Biology, characterizing the sedimentology and microbial ecology of sites with biologically mediated Mn-oxides in southern Appalachian caves. We also look at human impact on cave systems using a variety of tracers. For more information about our geomicrobiology research group, visit http://geomicrobiology.appstate.edu.
I also use multiple geochemical tracers to determine the fluid flow history and origin of Mn-oxide deposits in Cambrian rock units in the southern Appalachians. This work is in conjunction with Daniel Doctor and Ryan McAleer of the USGS, as well as other faculty and students at Appalachian State University.
I have recently returned to the rocks of the Dolomites (where I did my graduate work) to investigate the role of crystallography, trace element geochemistry, and order/disorder on replacement dolomitization processes, using electron backscatter diffraction (EBSD).
I was also involved in the Engare Sero Project with Dr. Cynthia Liutkus-Pierce to help fingerprint the source of the volcanic ash that has preserved early hominid footprints in Tanzania. New research on the project includes an investigation of the evolution of mineral chemistry in Si-deficient and carbonatite ash layers from the Ol Doinyo Lengai volcano; this work has been publicized by National Geographic, the Washington Post, and many others.
Prior to coming to Appalachian State, I spent much of my time at sea, on the R/V Atlantis, studying hydrothermal vents located at spreading ridges on the seafloor. My research explored fluid-rock interactions in altered basalt at the 9°50'N East Pacific Rise (EPR) Integrated Study Site (ISS).
My graduate work in the Latemar carbonate buildup, northern Italy explores the "Dolomite Problem," a classic sedimentology problem, from a metamorphic petrologist's point of view. It uses reactive transport theory to interpret the chemical, isotopic, and mineralogic effects of fluid-rock reactions in a (very) low-temperature metamorphic setting, one that is analogous to modern diffuse effluent systems in hydrothermal vent fields at mid-ocean ridges.