TY - RPRT TI - Carotenoid biomarkers in Namibian shelf sediments: Anoxygenic photosynthesis during sulfide eruptions in the Benguela Upwelling System AU - Jian Ma AU - Katherine L. French AU - Xingqian Cui AU - Donald Bryant AU - Roger Summons PY - 2021 DO - 10.1073/pnas.2106040118 UR - https://pubs.usgs.gov/publication/70223734 ID - 70223734 ER -