Kaena Ridge

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Kaʻena Ridge
Kaʻena Ridge is located in Hawaii
Kaʻena Ridge
Kaʻena Ridge
Location of Kaʻena Volcano in the Hawaiian Islands
Highest point
Elevation−3,937 ft (−1,200 m)
Coordinates21°49′19″N 158°46′19″W / 21.82194°N 158.77194°W / 21.82194; -158.77194Coordinates: 21°49′19″N 158°46′19″W / 21.82194°N 158.77194°W / 21.82194; -158.77194
Geography
LocationHawaii US
Geology
Mountain typeSubmerged shield volcano
Last eruptionPleistocene

Kaʻena Ridge, also referred to as the Kaʻena Volcano, is a submerged remnant of an ancient shield volcano that is to the north of and once comprised the northern section of the Hawaiian Island of Oʻahu.

Geology[]

Ka'ena Ridge was the oldest of the three volcanoes to form Oahu and it was also the shortest when it grew out of sea level. It was about 3,000 ft.[1]

Activity from Kaʻena began roughly 5 million years ago.[2][3] Despite being Oahu's oldest volcano, it broke sea level 400,000 years after the Waiʻanae did.[2] This is due to Kaʻena being built on a lower sea depth, whereas other Oahu volcanoes were built on pre-existing ridges.[3]

Around 3 million years ago, Kaʻena, Waiʻanae and Koʻolau were simultaneously emerged. Kaʻena would later submerge below sea level at an unknown date.[2]

In its current state, the crest of the Ka'ena Ridge extends 35-55 km wide and is located 75-100 km northwest of Kaena Point, the westernmost tip of Oahu.[4]

See also[]

References[]

  1. ^ closed access Borg, Jim (2014-05-10). "Lost peak: UH researchers uncover evidence of Kaena Volcano, part of a trio that formed Oahu". Honolulu Star-Advertiser. Honolulu, HI: Oahu Publications Inc. (Black Press). pp. A1, A7. OCLC 50065755. Retrieved 2014-05-10.
  2. ^ a b c McManus, Malia Mattoch (2014-05-20). "Ancient underwater volcano discovered in Hawaii". Reuters. Retrieved 2021-05-07.
  3. ^ a b Sinton, J. M.; Eason, D. E. (2014-12-01). "Growth History of Kaena Volcano, the Isolated, Dominantly Submarine, Precursor Volcano to Oahu, Hawaii". AGU Fall Meeting Abstracts. 11: V11B–4696.
  4. ^ Smith, J. R. (2002-12-01). "The Kaena Ridge Submarine Rift Zone off Oahu, Hawaii". AGU Fall Meeting Abstracts. 62: T62A–1300.


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