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View of
Hualalai southeast from Kuki`i Beach. Hualalai has three rift zones,
recognized by prominent cinder and spatter cones that trend northwest,
north, and south-southeast from a point about 5 km east of its summit.
Geologists have grouped lava flows exposed on the surface of Hualalai
according to the following ages:
- Lava flows < 10,000 years
old cover about 5 percent of the volcano
- Lava flows 5,000-10,000
years old cover about 15 percent of the volcano
- Lava flows 3,000-5,000 years
old cover about 25 percent of the volcano
- Lava flows 1,500-3,000 years
old cover about 38 percent of the volcano
- Lava flows 750-1,500 years
old cover about 8 percent of the volcano
- One map unit 200-750 years
old covers about 3 percent of the volcano
- Vent deposits and lava flows
of the historic A.D. 1800-1801 eruption cover about 6 percent of the
volcano
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