Evolution of stratigraphic terminology for the Neoproterozoic Era. Note that age ranges for subdivisions on previous timescales are based on current age estimates. Triangle symbol (Δ) denotes the approximate levels of glaciations relevant to the timescale subdivisions. * denotes the term ‘Ediacarian’ introduced by Cloud and Glaessner (1982). Terminology after Dunn et al. (1971); Harland (1964, 1982, 1990); Plumb (1991); Van Kranendonk et al. (2012) (GTS 2012); Knoll (2000) Strachan et al. (2020) (GTS 2020) and this paper as indicated.