Phreatomagmatic eruptions typically produce a wide roughly circular crater half to one kilometre in diameter surrounded by a low pyroclastic ring; this type of volcano is known as a maar. In Auckland, Lake Pupuke, Orakei Basin and Crater Hill (figure 4) are all examples of maars.
What kind of volcano is Lake Pupuke?
It is the crater of a scoria cone volcano that last erupted around 140,000 years ago. The lava from explosions at Lake Pupuke trapped many trees, which have become fossilised.
Is Lake Pupuke a volcano?
The lake is a volcano, about 150,000 years old. It is an explosion crater and so forms a basin rather than a hill or mountain. When volcanic activity ceased, the crater filled with fresh water, forming a 107-hectare lake.
What type of volcano is Rangitoto?
shield volcano cone
Rangitoto Island is a volcanic island in the Hauraki Gulf near Auckland, New Zealand. The 5.5 km (3.4 mi) wide island is a symmetrical shield volcano cone, reaching a height of 260 m (850 ft).
What types of volcanoes are in Auckland?
The Auckland volcanic field is made up of nearly 50 small volcanoes spread over a large area. Most of them are scoria cones, formed by the explosion of basalt magma throwing up ash and larger fragments. Some of the scoria cones also have lava flows around them.
Are there bodies in Lake Pupuke?
A man’s body has been found in Lake Pupuke on Auckland’s North Shore. The man was reportedly swimming with a friend on Tuesday night and got into trouble. The Police National Dive Squad recovered the man’s body last night.
Can you swim in Lake Pupuke?
Lake Pupuke is suitable for swimming but is murky and contains thick vegetation, and there have been drownings. The lake has been tested for bacteria and generally meets safe swimming conditions.
Can dogs swim in Lake Pupuke?
Unsuitable for swimming – The current prediction is that this site has a high health risk and is unlikely to meet national water quality guidelines for swimming.
When did Lake Pupuke first erupt?
It probably started with a huge explosion about 120,000 years ago. Basalt coming from depth finally encountered cold water and blasted large volumes of mud and ash into the air where it fell as a tuff ring roughly where hurstmere road skirts Lake Pupuke today.
Can you fish in Lake Pupuke?
Lake Pupuke provides good fishing for a reasonable population of stocked trout in a lake within Auckland city. Lake Pupuke is regularly stocked with rainbow and brown trout as well as holding a reasonable population of perch, tench, rudd, catfish and gold fish. Trout average around 1 kg.
Why is Rangitoto a shield volcano?
Once the volcano’s vent was above water level and the sea was excluded from interacting with the rising molten magma, the eruptions switched to dry- style fire-fountaining and the voluminous outwelling of lava flows which built up the circular shield volcano of Rangitoto that we see today.
What type of rock is Rangitoto made of?
The melted rock is basalt magma which has a low viscosity (flows easily) and may rise to the surface at speeds of up to 5 km/hour. Rangitoto consists of scoria cones on top of a broad ring of lava flows.
What type of volcano is Taupo?
rhyolitic volcano
Taupo, the most active rhyolitic volcano of the Taupo volcanic zone, is a large, roughly 35-km-wide caldera with poorly defined margins. It is a type example of an “inverse volcano” that slopes inward towards the most recent vent location.
What type of volcano is Auckland Domain?
Pukekawa volcano
Auckland Domain is the remains of Pukekawa volcano, one of the oldest volcanoes in the Auckland volcanic field, that erupted approximately 100,000 years ago. Pukekawa consists of a large explosion crater surrounded by a tuff ring with a small scoria cone named Pukekaroa Hill in the centre of the crater.
Is Auckland on a volcano?
Rangitoto: Auckland, New Zealand’s largest city, is home to around 50 volcanoes. The city’s most famous, and most active, is Rangitoto, viewed here from Cheltenham Beach. The Auckland Volcanic Field is dormant rather than extinct, with scientists estimating there’s a 0.1% chance of an eruption in any one year.
What type of volcanoes are in New Zealand?
There are three common volcano types:
- Caldera Volcanoes eg Taupō, Rotorua and Okataina.
- Cone Volcanoes eg Ruapehu and Ngāuruhoe.
- Volcanic Fields eg Auckland.
What is the depth of Lake pupuke?
Lake Pupuke is freshwater lake and a popular spot for rowers and sailing enthusiasts in Takapuna. The heart shaped lake is a result of two volcanic craters linking together. The circumference of the lake is 4.5 kilometres with a depth of 57 metrres.
Can you run around Lake Pupuke?
8000 STEPS / 7 km / 1—1.5 Hour
Each year thousands of people run, walk, jog or cycle around Lake Pupuke by road, unaware of the small, interesting reserves along the lake’s shore.
How many lakes are in Auckland?
The Auckland Region has approximately 72 water bodies which are 1 ha or greater in size. These water bodies range in from small ponds to several large flooded valleys which serve as reservoirs for Auckland’s water supply. Out of these 72 water bodies over 30 of them are considered as lakes.
Is Takapuna Beach safe to swim?
Takapuna Beach on Auckland’s North Shore was polluted by sewage at the weekend, but because of a bureaucratic bungle, the Safe Swim website assured the public it was low risk. Beachgoers who spotted a “public health warning” sign that was at odds with the website are upset.
How many dogs are you allowed in Auckland?
two dogs
Keeping more than two dogs
If you live in an urban zone, you need a licence to keep more than two dogs for longer than 30 consecutive days. This rule applies even if you don’t legally own the dogs. If you are classified as urban residential, you will need a licence.
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