With this project we will correlate biogeochemical signals of biotic redox cycling that we measure in situ with non-invasive geophysical measurements. This research takes place at a distinctive and unique site in Western Oklahoma, Zodletone Spring. Zodletone is a high salinity euxinic spring (high sulfide, anoxic) that discharges at the surface near Carnegie, Oklahoma. The discharging waters generate an extreme redox interface as they interact with the oxygenated sediments at the surface. 

The Hodges lab is responsible for soil and regolith characterization, geochemical analysis of monthly groundwater and porewater samples, and collection of monthly measurements of biogeochemical functioning using fixed-potential redox electrodes and soil gas measurements.