EntityQ3480795· pop 5· linked from 87 articlesSeven SistersSign in to saveseries of basalt ridgeline knobs between Mount Holyoke and Mount HitchcockConnectionsMassachusettsEntitygeographic coordinate systemEntitymountain rangeEntityigneous rockEntitybasaltEntitygeologic time scaleEntitysuburbEntitysummitEntitytopographic prominenceEntitySouth HadleyEntityHadleyEntityfault blockEntitySeven SistersEntitySeven SistersEntityMount GreylockEntityMount FrissellEntitylist of mountain typesEntityNormal routeEntityTaconic MountainsEntityBerkshiresEntityCategoriesHolyoke RangeMountains of Hampshire County, MassachusettsMountains of Massachusetts