“…Abundant garnet–hornblende–clinopyroxene mafic gneisses also outcrop on the hill of Cairn Leuchan (Figures and ) and are extensively migmatized. Although initially interpreted as Precambrian basement (Ramsay & Sturt, ; Read, ; Smith, Goodman, & Robertson, ; Sturt, Ramsay, Pingle, & Teggin, ; Viete, Richards, Lister, Oliver, & Banks, ), these mafic gneisses and intercalated metapsammite, metapelite, and calcsilicate lithologies have recently been stratigraphically reassigned to the Crinan Subgroup of the Upper Dalradian Series (Stephenson, Mendum, Fettes, Smith, et al., ), and thus are considered contiguous with the rest of the lower grade Barrow zone sequence. Detailed structural investigation has shown that these metamorphosed basic sheets were intruded as dykes and sills before regional‐scale Grampian deformation, although some fine‐grained rocks exposed near the base of the Subgroup are regarded as metavolcanic (Fettes, MacDonald, Fitton, Stephenson, & Cooper, ; Stephenson, Mendum, Fettes, Smith, et al., ).…”