“…Marshak and Karig (1977) fi rst proposed that the Sanak-Baranof belt formed by subduction of an oceanic spreading ridge (Fig. 2), and the concept has been supported by many subsequent workers (Hill et al, 1981;Moore et al, 1983;Bradley et al, 1993Bradley et al, , 2003Sisson et al, 1989Sisson et al, , 2003aSisson et al, , 2003bSisson and Pavlis, 1993;Plafker et al, 1989Plafker et al, , 1994Pavlis and Sisson, 1995;Haeussler et al, 1995Haeussler et al, , 2003aHaeussler et al, , 2003bBradley et al, 1998;Young, 1999, Kusky et al, 2003). One exception is Hudson et al (1979) and Hudson (1994), who argued that the forearc plutons formed as a crustal melting event resulting from the subduction of hot, young oceanic crust, but not necessarily the spreading ridge.…”