Mountains, glaciers and icefields in south-eastern Alaska and British Columbia, Canada. Hubbard glacier (bottom centre), the largest tidewater glacier in North America, spans the US-Canadian border. Its source is in Canada's Yukon Territory (roughly right of centre), and it stretches across Alaska (left) into Disenchantment Bay, the mouth of Yakutat Bay. The pancake-shaped Malaspina glacier is west of Yakutat Bay. Covering nearly 4000sq km, Malaspina is the largest piedmont glacier in the world. It is so large that it can only be seen in its entirety from space
Photograph: Envisat/ESA
The Guardian
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