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Lake Pupuke is a freshwater lake occupying a volcanic crater between the suburbs of Takapuna and Milford on the North Shore of Auckland, New Zealand. It has a circumference of around 6km and reaches about 60m in depth. It is popular with picnickers, paddlers, rowers, yachtsman, divers and wildfowl. The increasing populations of these groups have led to recent concern over water quality.
Other similar craters in the Auckland Volcanic Field were either buried by later eruptions, or breached by erosion as rainwater collected and overflowed the edge of the crater. Lake Pupuke remains a lake because water can escape through cracks in lava flows reaching under the crater wall, creating a series of freshwater springs along the beaches between Takapuna and Milford.
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