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Work in this lab focuses on trying to understand how landforms physically co-evolve with their chemistries. In the populous and developing regions of Asia, students are using optical luminescence (OSL) dating to test whether landform histories can explain why wells located only a few meters apart can have order of magnitude differences in dissolved arsenic. In soils being sourced on hillslopes in the nearby Sierra Nevada, we use OSL and geochemical mass balance models to figure out the rates at which elements like arsenic are biogeochemically weathering. Our overall goal is to use these weathering rates to see how land-evolution and surface-processes contribute to soil and aquifer quality and sustainability.     

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