“…It has certainly been studied by the greatest number and variety of workers. The sedimentation was studied by Sutton and Watson (1955) and Loudon (1963), but most of the subsequent investigations concentrated upon the structure and metamorphism (Sutton and Watson, 1956;Johnson and Stewart, 1960;Johnson, 1962;Loudon, 1963;Fettes, 1970Fettes, , 1971Treagus and Roberts, 1981;Moig, 1986). Several papers have concentrated upon the position and nature of the western margin of the Buchan Block and its relationship to the ‗main' part of the Grampian Terrane (Elles, 1931;Sturt et al, 1977;Ramsay and Sturt, 1979) leading to speculation on the nature and significance of the Portsoy-Duchray Hill Lineament (Ashcroft et al, 1984;Fettes et al, 1986Fettes et al, , 1991.…”