Speed dating auckland north shore

Posted by / 23-Jul-2017 14:56

Speed dating auckland north shore

If the material thrown out cools too rapidly, and becomes denser than the air, it cannot rise as high, and suddenly collapses back to the ground, forming a pyroclastic flow, hitting the surface like water from a waterfall, and spreading sideways across the land at enormous speed.When the pumice and ash settles, it is sufficiently hot to stick together as a rock called Ignimbrite.Some of these were enormous, and two eruptions around 1.25 and 1.0 million years ago were big enough to generate an ignimbrite sheet that covered the North Island from Auckland to Napier.

Later erosion and sedimentation had long-lasting effects on the landscape, and caused the Waikato River to shift from the Hauraki Plains to its current course through the Waikato to the Tasman Sea.The Taupo Volcano forms part of the Taupo Volcanic Zone, a region of volcanic activity that extends from Ruapehu in the South, through the Taupo and Rotorua regions, to White Island, in the Bay of Plenty.Taupo began erupting about 300,000 years ago, but the main eruptions that still affect the surrounding landscape are the Oruanui eruption, about 26,500 years ago, which is responsible for the shape of the modern caldera, and the Hatepe eruption, about 1,800 years ago.Lake Taupo, in the centre of New Zealand’s North Island, is the caldera of a large rhyolitic supervolcano called the Taupo Volcano.This huge volcano has produced two of the world’s most violent eruptions in geologically recent times.

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However, there have been many more eruptions, with major ones every thousand years or so (see timeline of last 10,000 years of eruptions).

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