“…In this immediately post‐glacial period, Shields (2005) predicted a ‘plumeworld’ with a kilometre‐scale freshwater lid on the ocean as a consequence of the insistence of climate models of Snowball Earth that the final meltdown would be very rapid. The carbonate facies are distinctive, implying some unique characteristics, but the link with atmospheric CO 2 drawdown has been challenged (Huang et al, 2016) and alternative models, such as deposition on sediment‐starved platforms over >10 5 years have been developed (Kennedy & Christie‐Blick, 2011; Nordsvan et al, 2019). The post‐glacial carbon isotope anomaly shows more complex features than originally thought and is the subject of many competing hypotheses.…”