Everything about The Auckland Volcanic Field totally explained
The
Auckland volcanic field is a generally
monogenetic volcanic field in the
North Island of
New Zealand.
Basaltic in nature, it underlies much of the
metropolitan area of
Auckland. The field's many vents have produced a diverse array of explosion craters,
scoria cones, and
lava flows. Currently
dormant, the field is likely to erupt again within the next "hundreds to thousands of years" (based on past events), a very short timeframe in geologic terms.
Features
Volcanoes
The first vents erupted at the
Domain,
Albert Park and
St Heliers between 60,000 and 140,000 years ago. Since then approximately 50 vents have erupted. Each eruptive vent has generally only had a geologically short period of activity. One exception is
Panmure Basin, where drilling has discovered a younger scoria cone buried under sediment within the larger and much older crater.
The most recent eruption (about 600 years ago
Human context
Usage
Several of the volcanic cones were occupied by substantial
Māori pa before
European settlement, and many terraces and other archeological remnants are still visible. Many of the cones have been levelled or strongly altered - in small part due to the historical
Māori use, but mostly through relatively recent quarrying of construction materials (especially
scoria). However several of the remaining volcanoes are now preserved as landmarks and parks.
In March 2007, New Zealand submitted the volcanic field, with several specifically named features, as a
World Heritage Site candidate based on its unique combination of natural and cultural features. At that time, only 2% of more than 800 World Heritage Sites worldwide were in this "mixed" category.
Dangers
Since the field isn't extinct, new volcanic events may occur at any time, though the usual period between events averages between hundreds and thousands of years. However, the effects of such an event, especially a full-scale eruption, would be substantial - ranging from
earthquakes, These tremors are likely to give some hours to some days of warning about an impending eruption and its approximate location.
List of volcanoes
The volcanoes within the field include:
Further Information
Get more info on 'Auckland Volcanic Field'.
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