Ofu-Olosega: Difference between revisions

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{{Short description|Twin islands in the Manuʻa Islands}}
{{redirectRedirect|Olosega}}
 
{{Infobox mountain
| name = Ofu-Olosega
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| prominence_ref =
| location = [[American Samoa]]
| coordinates = {{coordCoord|14.175|S|169.618|W|type:mountain_region:US-AS|display=inline,title}}
| topo = [[United States Geological Survey|USGS]]
| type = [[Shield volcano]]es
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}}
 
'''Ofu''' and '''Olosega''' are parts of a volcanic doublet in the [[Manua|Manu‘aManuʻa Island GroupIslands]], which is a part of [[American Samoa]] in the [[Samoan Islands]]. These twin islands, formed from [[shield volcanoesvolcano]]es, have a combined length of 6  km and a combined area of {{convert|12|km2|0|abbr=off|sp=us}}. Together, they have a population of about 500 people. Geographically, the islands are volcanic remnants separated by the narrow, {{convert|137|m|ft|abbr=off|adj=mid|-wide|sp=us}}) Āsaga Strait, composed of shallow-water [[coral reef]]. Before 1970, people crossed between the two islands by waiting until low tide and then wading across the shallow water of the strait. Since 1970, there has been a bridge over the strait, providing a single-lane road that connects the two islands.
 
The highest peak on Ofu Island is Mount [[Tumutumu]] (also called Tumu), at {{convert|491|m|ft|abbr=on}}. The highest peak on Olosega is Mount [[Piumafua]], at {{convert|629|m|ft|abbr=on}}. The most recent volcanic eruption was in 1866, {{convert|3|km|mi|abbr=on}} southeast of Olosega.<ref>{{cite web|url=http://www.volcano.si.edu/world/volcano.cfm?vnum=0404-01=|work=Smithsonian National Museum of Natural History|title=Global Volcanism Program, Ofu-Olosega|access-date=13 July 2010}}</ref>
 
Pre-historic artifacts discovered on Ofu by [[Archaeology|archaeological]] field work in the 1980s significantly furthered understanding of the ancient history of Ofu in particular, and the [[Samoa Islands]] and [[Polynesia]] in general. The artifacts include [[ceramics]], [[adze]]s, and worked shell and bone pieces. Samples of red-slipped plainware ceramics were found that appear to have been crafted in the tradition of the [[Lapita]] culture. The field work, carried out by a team that included [[Pacific]] archaeology specialist [[Patrick Vinton Kirch]], focused on a site called [[To'aga]] ''(site AS-13-1)'', a {{convert|2|km|mi|abbr=on|adj=mid}} coastal stretch on the south coast of Ofu. Dating of the artifacts suggested that Ofu has been continuously inhabited by humans for about 3,000 years.<ref>{{cite web|url=https://docs.google.com/viewer?a=v&q=cache:1D_9fsTUDIsJ:www.ashpo.org/library/7500022-1989.pdf+To'aga+Ofu+island&hl=en&gl=nz&pid=bl&srcid=ADGEESjCo9ETJerADlUmrIpGNa0TlEHS34boZCDbsr7ltIVTvC37O9jMHAVZrYq-NctDWAOpMj3i0WePk5Et760Bo-FDgPKP7JBnKuTN0cNfHT9jGBPGvPv8aJHMW-y1v2eQw461q3jn&sig=AHIEtbRwXePsS3tzSzRZiG_nq671oz_5SQ|work=Department of Parks and Recreation, Government of American Samoa |title=Final Report on Archaeological Investigations at Site ''AS-13-1'', To'aga, Ofu Island, American Samoa|first=Patric V. Kirch, Terry L. Hunt, Lisa Nagaoka|last=Jason Tyler|date=November 1989|access-date=13 July 2010}}</ref>
 
== Ofu ==
[[File:AmSamoa Ofu 160.JPG|thumb|left|230px|South shore of Ofu seen from Olosega across the narrow strait that separates them. The sharp peak, an eroding dike complex, is named Sunu‘itao.]]
 
Ofu is the western part of the volcanic outcrop of Ofu-Olosega Island and the westernmost of the Manu'a Islands.<ref name="auto">Hills, J.W. (2010). ''O upu muamua i le Tala i le Lalolagi mo e ua faatoa a'oa'oina u lea mataupu: Elementary Geography''. Nabu Press. Page 63. {{ISBN|9781147952896}}.</ref> The main village of [[Ofu Island|Ofu]] is located on the western shore, protected behind an offshore islet (eroded [[tuff cone]]) known as [[Nu'uteleNuʻutele (American Samoa)]]. Ofu has a [[Ofu Airport|small airport]] {{Airport codes|OFU|NSAS}} and a boat harbor that serve the population on Ofu and Olosega. The twice-weekly flight from [[Pago Pago]] takes about half an hour, but the airport has been closed since April 2021 for runway rehabilitation leaving the island without air service.
[[File:Olosega Native village 1896.jpg|thumb|right|220px|Olosega village 1896]]
Most of the southern shore and associated coral reef are part of the [[National Park of American Samoa]].
 
The island forms the [[Ofu County]] subdivision of the [[Manua|ManuaManuʻa District]]. It has a land area of 7.215&nbsp; km²<sup>2</sup> (2.786 sq mi), and had an official population of 176 persons as of the [[2010 United States Census, 2010census|2010 census]].
 
Situated on the south coast of the island is To'aga lagoon which has a high diversity of corals and fishes. The marine site has been part of long term research and study on coral reefs and global climate change.
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== Olosega ==
[[File:Olosega Village Aerial NPS.jpg|thumb|left|230px|Aerial view - Olosega village on the right, Ofu on the left. Both islands are connected via a single-lane bridge, crossing the Asaga strait.]]
 
Olosega is the smallest island in the [[Manu'aManuʻa Islands]]. It is possible to walk across to Ofu Island at low tide.<ref name="auto"/><ref>Holmes, Lowell D. (1974). ''Samoan Village''. Holt McDougal. Page 3. {{ISBN|9780030779251}}.</ref> The name derives from [[Samoan language|Samoan]] ''ʻOlosega'', "fortress of [[parakeet]]s."<ref>{{Cite journal|url=http://www.jstor.org/stable/199273|title=Geographical Nomenclature of American Samoa|author=Churchill, William|year=1913|journal=Bulletin of the American Geographical Society|volume=45|issue=3|pages=187-193|via=JSTOR|doi=10.2307/199273}}</ref>
 
Olosega Island is a remnant of the Sili [[shield volcano]], the [[caldera]] of which may lie submerged off the north shore.
 
The volcanic eruption of 1866 was actually {{convert|3|km|mi|abbr=on}} east of Olosega, on a [[submarinemid-ocean ridge]] that extends east southeast to nearby [[Tau, Samoa|Ta‘ūTaʻū]].
 
The island forms the [[Olosega County]] subdivision of the [[Manua|ManuaManuʻa District]]. It has a land area of 5.163&nbsp;km²<sup>2</sup> (1.993 sq mi), and had an official population of 172 persons as of the 2010 census.
There are four villages on Olosega: [[Olosega (Village)|Olosega]], [[Lalomoana]], [[Sili (Olosega)|Sili]], and [[Faiava]].
 
==Gallery==
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{{American Samoa}}
 
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[[Category:Islands of American Samoa]]
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[[Category:Polygenetic shield volcanoes]]
[[Category:Manu'a]]
[[Category:Eastern Samoan Volcanic Province]]