Māhukona
Māhukona is located in Hawaii
Māhukona
Māhukona
Location in Hawaii
Highest point
Elevation−3,770 feet (−1,149 m)
Coordinates20°01′N 156°01′W / 20.017°N 156.017°W / 20.017; -156.017
Geography
LocationHawaii, US
Parent rangeHawaiian Islands
Topo mapUSGS Kamuela
Geology
Mountain typeShield volcano, Hotspot volcano
Volcanic arc/beltHawaiian-Emperor seamount chain
Last eruptionAbout 470,000 BP

Māhukona is a submerged shield volcano on the northwestern flank of the Island of Hawaiʻi. A drowned coral reef at about 3,770 feet (-1,150 m) below sea level and a major break in slope at about 4,400 feet (-1,340 m) below sea level represent old shorelines.

A roughly circular caldera marks its summit. A prominent rift zone extends to the west. A second rift zone probably extended to the east but has been buried by younger volcanoes.

The main shield-building stage of volcanism ended about 470,000 years ago. The summit of the shield volcano was once 800 feet (250 m) above sea level, but subsided below sea level between 435,000 and 365,000 years ago.[1]

Māhukona is the oldest volcano to build Hawaiʻi island, older than Kohala and Mauna Kea.[2]

The Monterey Bay Aquarium Research Institute investigated the area with a remotely controlled submarine in 2001.[3]

It was named for the area known as Māhukona, on the shore to the northeast.[4]

References

  1. ↑ "Mahukona, Hawaii". Volcano World. Oregon State University. Archived from the original on 2012-02-16. Retrieved June 23, 2010. attributed to:
    David A. Clague; James G. Moore (April 1991). "Geology and Petrology of Mahukona Volcano". Bulletin of Volcanology. 53 (3): 159–172. Bibcode:1991BVol...53..159C. doi:10.1007/BF00301227. S2CID 129362650.
  2. ↑ "Volcanoes of the Big Island". Volcano Watch. Hawaiian Volcano Observatory. September 15, 1995. Retrieved June 23, 2010.
  3. ↑ "Hawaii Cruise: March 13, 2001 to June 2, 2001". Monterey Bay Aquarium Research Institute. Retrieved June 23, 2010.
  4. ↑ U.S. Geological Survey Geographic Names Information System: Māhukona

Further reading


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