Columbia Glacier
This thick, sprawling piece of ice, six miles across and a half a mile thick in some places, is currently the fastest moving glacier in the world. The glacier regularly calves (splits off) small and large chunks into the sea at Prince William Sound. Since 1982, the Columbia Glacier has shrunk by nearly seven miles. Over the next 20 to 50 years, some scientists expect the glacier to completely recede, leaving nothing behind but a sprawling, rock-strewn fjord. Others note that glacier movement can be cyclical, and Columbia Glacier is just manifesting a normal, centuries-old pattern.
Columbia Glacier
Columbia Glacier