Successive flexures or ridges are ranged in more or less parallel lines, and from between the bands of hard, unyielding rock of older formation the soft beds of recent shale have been washed out, to he carried through the enclosing ridges by rifts which break across their axes.
Shales occur, and the passage of the streams through deep rifts or gorges across the hard limestone anticlinals, which stand in irregular series of parallel ridges with the eroded valleys between.
The intellect is a cleaver; it discerns and rifts its way into the secret of things.
Pinnacle on the western side, contains a low new cone with numerous steaming rifts and vents.
An outbreak in 1894 produced numerous rifts in the inner walls from which steam and smoke have issued ever since.