one well known double summit is austria’s highest mountain, the großglockner, where the main summit of the großglockner is separated from that of the kleinglockner by the glocknerscharte col in the area of a geological fault. other double summits have resulted from geological folding. for example, on mont withrow in british columbia resistant sandstones form the limbs of the double summit, whilst the softer rock in the core of the fold was eroded.