A peninsula that juts out into the Sea of Japan at the base of the Oshima Peninsula in western Hokkaido. It is based on the Neogene layer, and on top of that are volcanic bodies made of andesite and quartz trachyte, forming the Shiribeshi volcanic group. In the northern mountain range there are mountains such as Shakotan-dake (1,255 meters), Yobetsu-dake (1,298 meters), Ponneanchi-dake (1,145 meters), and Sannai-dake (1,091 meters), while in the southern mountain range there are mountains such as Kumaoi-dake (805 meters), Tengu-dake (872 meters), and Hachinai-dake (944 meters). The mountains approach the coast and form sea cliffs of 20 to 80 meters. There are many capes on the peninsula, including Cape Maruyama, Cape Makka, Cape Shakotan, Cape Kamui, Cape Kawashiro, and Cape Ryujin. The rivers that cut through the mountains are small, but in some places they are rapid and drop like waterfalls. Due to the lack of flat land, agriculture has not developed, and fishing villages such as the two major fishing ports of Yoichi and Iwanai, Furubira, Bikuni, Irika, Yobetsu (Shakotan Town), and Kamoenai are scattered throughout the area. In place of the herring fishery of the past, the area now catches pollock, sand lance, and other fish. National Route 229 runs along the coast. The entire coastline forms the Niseko-Shakotan-Otaru Coast Quasi-National Park. [Hideyoshi Segawa] Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
北海道西部、渡島(おしま)半島の基部で日本海に突き出る半島。新第三紀層を基盤とし、その上に安山岩、石英粗面岩などからなる火山体をのせ、後志火山群(しりべしかざんぐん)をなしている。北部山地に積丹岳(1255メートル)、余別(よべつ)岳(1298メートル)、ポンネアンチシ山(1145メートル)、珊内(さんない)岳(1091メートル)、南部山地に熊追山(805メートル)、天狗(てんぐ)岳(872メートル)、八内(はちない)岳(944メートル)などの山々がある。山地は海岸に迫り、20~80メートルの海食崖(がい)をなしている。半島には丸山岬、マッカ岬、積丹岬、神威(かむい)岬、川白岬、竜神岬など多くの岬がある。山地を刻む河川は小さいが急流で滝となって落下する所もある。平地に乏しいために農業は発達せず、余市(よいち)、岩内(いわない)の二大漁港をはじめ、古平(ふるびら)、美国(びくに)・入舸(いりか)・余別(積丹町)、神恵内(かもえない)などの漁業集落が点在し、かつてのニシン漁にかわって、スケトウダラ、コウナゴなどを漁獲する。海岸沿いを国道229号が走る。海岸一帯はニセコ積丹小樽(おたる)海岸国定公園をなす。 [瀬川秀良] 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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