见于岛或群岛的周围，坡度极小，水深约200米以浅的平坦海底。其外缘为坡度稍大的岛坡，进而降至深海。一般来说，在地质年代古老的岛屿的外围海域，宽阔的岛架有扩展的倾向。
每天都有一架飞机过来运送客人来往鸟岛宾馆。
Every day, a plane arrives to ferry guests to and from Bird Island Lodge.
当一架飞机从洛杉矶国际机场飞往伦敦时，一度的差异可以决定他是降落在格陵兰岛还是非洲。
When a jet takes off from LA international, headed toward London, one degree of difference can determine whether he lands in Greenland or Africa.
另一纠纷就是斯匹卑尔根岛之争，俄罗斯宣称自1920年开始就有用那里的开矿权，俄挪威则称挪威拥有那里的环大陆架地区。
Another dispute is around the island of Spitsbergen, on which Russia has had mining rights since 1920. Norway says it owns the continental shelf around it.
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