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[Stockbild] Meltwater pond. Aerial photograph of a meltwater pond on a glacier, formed from melted glacial ice. This glacier is part of the Vatnajokull ice cap in Iceland, which covers an active volcano system. When the volcanoes erupt, parts of the glacier melt. Meltwater runs through the glacier and collects in pools, as seen here. Eruptions release large amounts of volcanic ash into the air which settles over the surface of the glacier (black). (KEYSTONE/SCIENCE PHOTO LIBRARY/BERNHARD EDMAIER) === ===