text: Liathach , Beinn Alligin , Suilven , CÃ l MÃ r , CÃ l Beag , and Quinag are just some of the impressive rock islands of dark red or gray Torridonian sandstone which project out of the gneiss .
simplified: There are impressive rock islands of dark red or gray Torridonian sandstone which project out of the gneiss .