Английская Википедия:Astoria Fan

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The Astoria Fan is a submarine fan. It has sediment, radiating asymmetrically southward from the mouth of the Astoria Canyon. From Astoria Canyon's mouth, the fan extends about Шаблон:Convert to its western end, which is the Cascadia Channel. The fan proper ends Шаблон:Convert south of the canyon mouth, although its depositional basin extends southward another Шаблон:Convert to the Blanco Fracture Zone.[1]

Astoria Fan is generally asymmetrical. It extends roughly Шаблон:Convert west of the mouth of Astoria Canyon, and about Шаблон:Convert north, to Willapa Channel. Others trace different dimensions.[2]

Headed west, the fan crosses the continental shelf, trending sinuously down to the base of the continental slope. Near Astoria Canyon, it is at a depth of Шаблон:Convert. The fan is approximately Шаблон:Convert long. It varies in width from Шаблон:Convert to Шаблон:Convert.[3] It has numerous tributaries.[4] The fan extends about Шаблон:Convert to its western boundary, which is the Cascadia Channel.

Ash from the eruption of Mount Mazama has been found, in Astoria Fan.[1] It may have been cut in the Pleistocene.[4] It appears the Missoula Floods helped carve the fan.[5]

Astoria Fan merges into Astoria Canyon, Шаблон:Convert west of the Columbia River mouth. In the past, buried Pleistocene channels appear to have connected the two.[4]

Nearby submarine canyons

All of the following submarine canyons are near, headed north to south:[6][7]

See also

Local geography

References

Шаблон:Reflist

External links and references

Партнерские ресурсы
Криптовалюты
Магазины
Хостинг
Разное

  1. ↑ 1,0 1,1 Шаблон:Cite book
  2. ↑ Шаблон:Cite web
  3. ↑ Шаблон:Cite journal
  4. ↑ 4,0 4,1 4,2 Шаблон:Cite journal
  5. ↑ Шаблон:Cite web
  6. ↑ Шаблон:Cite web
  7. ↑ Шаблон:Cite web
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