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Onepoto (volcanic crater) : ウィキペディア英語版 | Onepoto (volcanic crater)
Onepoto is the name of a volcanic explosion crater (or maar) in North Shore City, New Zealand. It is a part of the Auckland volcanic field. Located near the approaches to the Auckland Harbour Bridge, it was created by a series of eruptions approximately 250,000 years ago. The crater first became a freshwater lake, and later became a tidal lagoon when sea level rose to the present level 7000 yrs ago after the last ice age. The crater's floor has been reclaimed, with recreational sports fields and a pond, and some parts of the tuff ring were quarried away in the 1950s to provide fill for the Northern Motorway.〔''Onepoto and Tank Farm'' - ''City of Fire'', insert magazine in the ''The New Zealand Herald'', Friday 15 February 2008〕 ==See also==
*Onepoto Bridge, a bridge offering views of the area *Tank Farm, a neighbouring crater
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