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Isfjell

Et isfjell er et stort stykke is som har brutt av fra kanten av isbreer eller ishyller og som flyter løst i havet (se isbrekalving). De kan flyte i ukesvis i det åpne havet til de smelter bort. Kun omtrent 1/8 av isfjellets volum ligger over vannoverflaten. Store isfjell kan utgjøre en betydelig trussel mot skip. Store isjfell er ifølge US Coast Guard Navigation Center over 75 meter høye og over 213 meter lange.

 

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