Kaena Ridge
Kaʻena Ridge | |
---|---|
Highest point | |
Elevation | −3,937 ft (−1,200 m) |
Coordinates | 21°49′19″N 158°46′19″W / 21.82194°N 158.77194°W |
Geography | |
Location | Hawaii US |
Geology | |
Mountain type | Submerged shield volcano |
Last eruption | Pleistocene? |
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[edit]
Kaʻena Ridge was the oldest of the three volcanoes to form Oʻahu 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 Oʻahu'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 Oʻahu volcanoes were built on pre-existing ridges.[3]
Around 3 million years ago, Kaʻena, Waiʻanae and Koʻolau simultaneously emerged. Kaʻena would later submerge below sea level at an unknown date.[2]
In its current state, the crest of the Kaʻena Ridge extends 35–55 km wide and is located 75–100 km northwest of Kaʻena Point, the westernmost tip of Oʻahu.[4] there is a disputed eruption that occurred near the volcano on May 22nd 1956[5]
See also[edit]
References[edit]
- ^ 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.
- ^ a b c McManus, Malia Mattoch (2014-05-20). "Ancient underwater volcano discovered in Hawaii". Reuters. Retrieved 2021-05-07.
- ^ 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.
- ^ Smith, J. R. (2002-12-01). "The Kaena Ridge Submarine Rift Zone off Oahu, Hawaii". AGU Fall Meeting Abstracts. 62: T62A–1300.
- ^ "Submarine Volcanic Eruption in Hawaii in 1956 | John Seach". volcanolive.com. Retrieved 2024-01-11.