Kat co-authored a manuscript in Nature. Using publicly available geochemical data from the Bakken shale, we identified basin-wide trends in redox sensitive elements (e.g., Mo and V), revealing expanding anoxic conditions through the Devonian-Carboniferous transition. Stepwise flooding in shallow interior basins, like the Williston, & onset of euxinia was widespread in this time, leading to large scale deposition of black shales and hydrocarbon reserves. In this work, we suggest that euxinic expansion in the shallow habitable zone of the oceans also contributed to the pattern and severity of Late Devonian mass extinction, and that hydrogen sulfide toxicity played a key role in shifting Phanerozoic biodiversity. You can read it here.