Английская Википедия:Hopi Buttes volcanic field

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Шаблон:Short description

Файл:Hopi Buttes.jpg
Hopi Buttes, about 30 miles SE of First Mesa
Файл:Flying Butte Hopi Buttes AZ.jpg
Oblique air photo of Flying Butte, facing approximately south

Hopi Buttes volcanic field is a monogenetic volcanic field located on the Colorado Plateau mostly on the Navajo Reservation around the town of Dilkon in northeastern Arizona north of Holbrook.

The volcanic field covers an area of approximately Шаблон:Convert and contains about 300 maars and diatremes.[1]

The erosional exposure of the deposits varies with those in the eastern portion exhibiting the shallowly eroded maar deposits and those in the western portion the more deeply eroded feeder diatremes. The maars result from explosive interaction of the hot diatreme material with the groundwater system and result in a mixture of volcanic tuff material and sediments of the Miocene–Pliocene lacustrine sediments of the Bidahochi Formation. In the western portion of the field the buttes consist of the feeder diatremes of monchiquite and nepheline syenite magmas.[2]

Most of the volcanic activity occurred between 8.5 and 6 million years ago, with the most recent dated at 4.2 million years ago.[3]

Notable vents

Name Elevation Location Last eruption
meters feet Coordinates
Coliseum Maar[4] 1,811 5,940 Шаблон:Coord
Morale Claim Maar[5][6] 1,859 6,100 Шаблон:Coord

See also

References

Шаблон:Reflist

Шаблон:Commons category

Шаблон:Authority control Шаблон:Coord

Партнерские ресурсы
Криптовалюты
Магазины
Хостинг
Разное

  1. ↑ Geo-Ecological Study of Historic and Prehistoric Land Use in the Hopi Buttes area, Navajo Nation, Arizona, USGS
  2. ↑ Zelawksi, Mallory The Hopi Buttes volcanic field, Northern Arizona University, Flagstaff, AZ, The Arizona Geological Survey, 2010
  3. ↑ Volcano World, Coliseum Maar, Hopi Buttes, Arizona Шаблон:Webarchive
  4. ↑ Шаблон:Cite web
  5. ↑ Шаблон:Cite book
  6. ↑ Шаблон:Cite web
Источник — http://wikihandbk.com/ruwiki/index.php?title=Английская_Википедия:Hopi_Buttes_volcanic_field&oldid=15285597