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Yunaska () is the largest of the Islands of Four Mountains group in the Aleutian Islands of southwestern Alaska, United States. It has a land area of 66.834 sq mi (173.099 km²) and no population at the 2000 census. The island measures long and wide. The island comprises two volcanic mountains, with a valley between. The western mountain is composed of four overlapping and eroded stratovolcanoes, with a cinder cone field at the western end. It has not been historically active. The eastern mountain is a large shield volcano with two overlapping summit calderas, which last erupted in 1937. ==References== *(Yunaska Island: Block 1081, Census Tract 1, Aleutians West Census Area, Alaska ) United States Census Bureau *(Yunaska description and statistics ), Alaskan Volcano Observatory. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Yunaska Island」の詳細全文を読む スポンサード リンク
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