Carbon–Mercury Interactions in Spodosols Assessed through Density Fractionation, Radiocarbon Analysis, and Soil Survey Information

Spodosols are the **most** photogenic soils *(personal opinion)*. Their dark organic surface horizons, followed by a light colored mineral horizon, then bookend-ed with another very dark - often red - mineral horizon makes these tri-colored soils magnificent to stare at. These Spodosols are relatively rare, but concentrated in a few places in the US where historical anthropogenic emissions are the most likely sources of Mercury. In this paper we focus on different Spodosols around the US, combining pedologic and geochemical analysis to identify how carbon and mercury interact down the soil profile.