Temperate Highland Peat Swamps on Sandstone (THPSS) are a distinctive feature of low-relief plateaus in eastern Australia (Dodson et al., 1994; Fryirs et al., 2014; Young, 1986a; Young and Young, 1988). Using the classification of Charman (2002) and Evans and Warburton (2007), these systems are valley mire fens