“…However it must be noted that the only requirement to form these rocks is the burial and dehydration of surface rocks under a mantle wedge, irrespective of the actual size and geometry of the buried portions of rock. Additional evidence includes the map pattern of many Archaean provinces (Czarnota et al, 2010;Percival et al, 2002;Poujol et al, 2003), reminiscent of lateral accretion of stitched terranes (Coney et al, 1980), as well as the existence of flat seismic reflectors, possibly representing fossil subduction planes (de Wit and Tinker, 2004;Goleby et al, 2004;Ludden and Hynes, 2000). Finally, the existence of Archaean highpressure and medium to low temperature metamorphism (Block et al, 2012;Saha et al, 2010Saha et al, , 2011Volodichev et al, 2004), sometimes associated with "hotter" metamorphic rocks in Archaean analogues of paired metamorphic belts (Banno and Nakajima, 1992;Brown, 2002;Patrick and Day, 1995), suggests the existence of some form of subduction process in the Archaean.…”