Ojika Island

Japanese: 小値賀島 - おぢかじま
Ojika Island

An island located in the north of the Goto Islands in Nagasaki Prefecture. It belongs to Ojika Town, Kitamatsuura District. Its area is 12.22 square kilometers. The island is based on a basalt lava field that spreads just above sea level. About 20 mortar-shaped volcanoes of various sizes, including Honjo-dake (111 meters), Ban-dake (105 meters), and Atago-dake (85 meters), and pyroclastic cones, have erupted with their bases touching each other, and these are connected like beads to form the island. Volcanic bombs and volcanic tears are often found in the volcanic gravel, and circular depressions called daki can be seen on the coast. The neighboring islands of Koroshima and Oshima are also either individual volcanic cones or the combined remains of several volcanic cones. Population: 2,546 (2009).

[Yasuyoshi Ishii]

[Reference] | Ojika (town)

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

長崎県五島列島(ごとうれっとう)の北方にある島。北松浦(きたまつうら)郡小値賀町に属する。面積12.22平方キロメートル。海面すれすれに広がる玄武岩の溶岩原を基底に、本城(ほんじょう)岳(111メートル)、番(ばん)岳(105メートル)、愛宕(あたご)岳(85メートル)など大小約20座の臼状(きゅうじょう)火山、火山砕屑丘(さいせつきゅう)が裾野(すその)を接して噴出、これらが数珠(じゅず)状につながって一島を形成している。火山礫(れき)中には火山弾や火山涙(るい)が多くみられ、海岸にはダキとよばれる円形陥没状の海食地形がみられる。周辺の古路(ころ)島、大島などの属島も単独の火山砕屑丘ないし数個の砕屑丘が結合してできた島である。人口2546(2009)。

[石井泰義]

[参照項目] | 小値賀(町)

出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例

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