A reconstructed curve of the radiogenic strontium isotope composition of Neoproterozoic seawater (blue line) superimposed on carbonate carbon isotope values (after Zhou et al. 2020). Seawater 87Sr/86Sr evolution reflects changes to strontium inputs to the oceans via weathering and hydrothermal exchange that are in turn linked to episodes of continental assembly and break-up (top of figure) and weathering of LIPs (red bars). Rising seawater 87Sr/86Sr through the Neoproterozoic Era can be used for global stratigraphic correlation and future chronostratigraphic subdivision.