Huge chunks of ice have broken off the Tasman Glacier, New Zealand's largest. They have filled up at least a quarter of the meltwater lake at the foot of the glacier in the Aoraki/Mount Cook National Park, reports say. The lake started to form in the 1970s as the glacier rapidly retreated - a phenomenon thought to have been largely caused by global warming.
One guide says the chunks resemble huge skyscrapers lying on their side in the water. "We've got skyscraper-size icebergs floating around on the lake," Glacier Kayaking owner Charlie Hobbs told Radio New Zealand.
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