Lab member Malcolm Hodgskiss has published a paper in PNAS titled "A productivity collapse to end Earth’s Great Oxidation." The work focused on rocks of the Belcher Group, from his main thesis area in the Belcher Islands, Hudson Bay, Nunavut, Canada. The Belcher Group was recently dated by Malcolm to ~2018 Ma, in the direct aftermath of the Great Oxidation Event. Analysis of triple oxygen isotopes, sulfur isotopes and barium isotopes, done in collaboration with colleagues at Princeton University, University of Colorado, and WHOI, capture a rapid reduction in primary productivity of >80% from the peak of the GOE. The paper can be accessed here.