Английская Википедия:Adams Seamount

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Версия от 04:29, 1 января 2024; EducationBot (обсуждение | вклад) (Новая страница: «{{Английская Википедия/Панель перехода}} {{short description|Submarine volcano above the Pitcairn hotspot in the central Pacific Ocean}} {{Infobox Seamount | name = Adams Seamount, Forty Mile Reef | depth = 39 m (128 ft)<ref name=gvp-reports>{{cite gvp|vn=333050 |name=Adams Seamount |accessdate=2017-02-28}}</ref> | height = 3,500 m (11,500 ft) | map = | summit_area = | location=Pacific Ocea...»)
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Шаблон:Short description Шаблон:Infobox Seamount Adams Seamount (also known as Forty Mile Reef[1]) is a submarine volcano above the Pitcairn hotspot in the central Pacific Ocean about Шаблон:Convert southwest of Pitcairn Island.

Geography and geomorphology

Adams is part of a field of about 90 seamounts Шаблон:Convert east-southeast away from Pitcairn Island, and the largest of these.Шаблон:Sfn Adams lies southeast of another large seamount, Bounty Seamount.Шаблон:Sfn Most of these seamounts except for Adams and Bounty are less than Шаблон:Convert high.Шаблон:Sfn They were discovered in 1989 by the RV Sonne research ship.Шаблон:Sfn

It is a conicalШаблон:Sfn seamount rising Шаблон:Convert from the sea floor to about Шаблон:Convert[2] or Шаблон:Convert below the surface of the ocean.[1] The total volume of the seamount, whose base has a diameter of about Шаблон:Convert, is about Шаблон:Convert.Шаблон:Sfn Adams has two summits,Шаблон:Sfn and coral and sand derived from coral has been found on Adams.Шаблон:Sfn Given its height, during the last glacial maximum Adams was likely an island.[3]

Its slopes are covered by recent lava flows, volcanic debris and hyaloclastite.Шаблон:Sfn Lava flows feature aa lava characteristics and lava tubes, while deeper parts of the edifice are covered with lapilli and scoria.Шаблон:Sfn Parasitic vents form cones and mounds on its flanks.Шаблон:Sfn

Geology

Adams and the other seamounts were created by the Pitcairn hotspot, and these seamounts are its present-day location.Шаблон:Sfn This hotspot is one among several hotspots in the Pacific Ocean, along with the Austral hotspot, Hawaii hotspot, Louisville hotspot, Samoa hotspot and Society hotspot.Шаблон:Sfn The seamounts rise from a 30 million years old crust.Шаблон:Sfn

Alkali basalt, trachyteШаблон:Sfn and tholeiite have been dredged from Adams Seamount.Шаблон:Sfn

Eruption history

The fresh appearance of samples and the lack of sedimentation indicates that Adams Seamount is a recently active seamount.Шаблон:Sfn Potassium-argon dating of rocks dredged from Adams Seamount has yielded Holocene ages, including one age of 3,000 ± 1,000 years before present.Шаблон:Sfn Other ages range from 4,000 - 7,000 years before present.Шаблон:Sfn Unlike Bounty, Adams Seamount displays no active hydrothermal system.Шаблон:Sfn

Biology

Adams seamount features a coral reef, one of the deepest tropical reefs in the world. It is mainly formed by Pocillopora sp. and Porites deformis corals, but also many reef fish and sharks; it is used as a fishing ground by Pitcairn.[1] Adams seamount is part of the Pitcairn Islands Marine Reserve.[4]

References

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Sources

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Партнерские ресурсы
Криптовалюты
Магазины
Хостинг
Разное

  1. ↑ 1,0 1,1 1,2 Ошибка цитирования Неверный тег <ref>; для сносок Irving2019 не указан текст
  2. ↑ Ошибка цитирования Неверный тег <ref>; для сносок gvp-reports не указан текст
  3. ↑ Шаблон:Cite journal
  4. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Albert2018 не указан текст
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