Puu Mahana
Puu Mahana is a tuff ring built on a primary vent. The cone is roughly
28,000 years old and has subsided 220 feet (67 m) (twice its present
height) since it formed. The Green Sand Beach is the result of erosion
of the ash from the cone and concentration of olivine crystals by wave
action.
West of South Point Road highway 11 crosses the southwest rift zone of
Mauna Loa volcano.
To Volcano World
