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Volcanoes

Volcanoes. A mountain or hill, usually having a cuplike crater at the summit, formed around such a vent from the ash and lava expelled through it. Where Do We Find Volcanoes ?.

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Volcanoes

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  1. Volcanoes A mountain or hill, usually having a cuplike crater at the summit, formed around such a vent from the ash and lava expelled through it.

  2. Where Do We Find Volcanoes ? • Volcanoes are normally found somewhere where tectonic plates pull apart or are coming together. Volcanoes can also form where there is stretching of the Earth's crust and where the crust grows thin. Major Fault Lines In The World

  3. New Zealand has been greatly affected by its position on the edge of two tectonic plates. The boundary between the Pacific Plate and the Indian/ Australian Plate bisects the north and south islands of New Zealand, resulting in extensive mountain range uplift and volcanic activity. The Two Tectonic Plates

  4. Types of Volcanoes  Even though each volcano is different and has its own unique history, volcanoes are places in three main groups. These are - • Scornia Cone – This volcano has straight sides with steep slopes it also has a very large crater. • Shield Volcano - Very Gentle Slopes • StratoVolcano - Gentle lower slopes, but steep upper slopes, small summit crater  Scornia Cone Shield Volcano StratoVolcano

  5. Volcanoes In New Zealand • Egmont • Ngauruhoe • Pukekaikoire • Raoul Island • Ruapehu • Ruapehu Crater Lake • Tangiwai Disaster • Tarawera • Tongariro • White Island

  6. White Island / Whakaari • White Island is an active andesite strato-volcano, situated 48 km from the east coast of the North Island of New Zealand, in the Bay Of Plenty. It is one of the four islands in the Olive island chain. The island is roughly circular, about two km in diameter, and rises to a height of 321 m above sea level.

  7. Mount Ruapehu • Mt. Ruapehu is a stratovolcano on the North Island of New Zealand. It has erupted about 50 times since 1861. At the top of the volcano there is an acidic crater lake. Most eruptions are pheatric , involving steam explosions caused by the contact of lava and water. The most recent major phreatic eruption was in 1975. Phreatic explosion at Ruapehu in 1992.

  8. Thank you Lily Hospers

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