| 词条 | Onepoto (volcanic crater) |
| 释义 |
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.[1] See also
References
1. ^Onepoto and Tank Farm - City of Fire, insert magazine in The New Zealand Herald, Friday 15 February 2008. External links
2 : Auckland volcanic field|Maars of New Zealand |
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