Lava flow and columnar joints of Noborio-Minami Volcano; strata of the submarine volcano covered with lava flow
Kamadaru presents a great sight of water cascading down a mass of lava that was itself in motion long ago. Massive joints are also visible around the waterfall. These joints form in the directions along which lava cools (which are usually the upper part exposed to the air and the lower part in contact with the ground).
The columnar joints of Kamadaru Falls have intricate shapes as they are made of lava which flowed through the bottom of the valley.