Underground Lava Cascade
When
the glowing lava flow effusive from a crater flows over a steep drop or scarp, a lava
cascade forms. The cascade occurring in the underground
lava tunnel is called underground lava cascade. This underground lava
cascade has a width of about 8 m, drop of 1.5 m and slope
gradient of about 60 degrees. On the surface of the cascade exhibit many
traces of lava flow micro-landscapes in the shapes of streams, braids, sprays,
waves, ropes, trunks, etc, which are vivid and marvelous.