Bivalves usurped brachiopods as the dominant benthic filter-feeders—the reasons why have been debated. new #Geology paper by Kemi Ashing-Giwa and colleagues support the hypothesis that sulfide played a significant role in the extinction’s selectivity. Read article: geosociety.co/Ashing-Giwa_et_al

Were Earth's deep oceans better oxygenated during the Tonian than later in the Neoproterozoic? New thallium isotope data suggest they were. Check out our new paper in Geology: doi.org/10.1130/G536...