Solution-based geochemical data of Orbulina universa shells

This dataset contains geochemical and analytical quality-control data generated for planktonic foraminifera Orbulina universa from IODP Expedition 361 Site U1476 in the Mozambique Channel, western Indian Ocean. The dataset supports the evaluation of O. universa geochemistry as an archive of past seawater pH, atmospheric CO₂, and paleoceanographic variability over glacial–interglacial to million-year timescales.