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Ōkataina Caldera
Ōkataina Caldera (Ōkataina Volcanic Centre, also spelled Okataina) is a volcano, volcanic caldera and its associated volcanoes located in Taupō Volcanic Zone of New Zealand's North Island. It has several actual or postulated sub calderas. The Ōkataina Caldera is just east of the smaller separate Rotorua Caldera and southwest of the much smaller Rotomā Caldera, Rotomā Embayment which is usually regarded as an associated volcano. It shows high rates of explosive rhyolite, rhyolitic volcanism although its last eruption was basaltic. The postulated Haroharo Caldera contained within it has sometimes been described in almost interchangeable terms with the Ōkataina Caldera or volcanic complex or centre and by other authors as a separate complex defined by gravitational and magnetic features..Possibly started from with the author presuming that certain ignimbrites came from this source. The term Haroharo Caldera was increasingly used in academic papers in the 1970's and 1980's but ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Island
The North Island ( , 'the fish of Māui', historically New Ulster) is one of the two main islands of New Zealand, islands of New Zealand, separated from the larger but less populous South Island by Cook Strait. With an area of , it is the List of islands by area, world's 14th-largest island, constituting 43% of New Zealand's land area. It has a population of which is % of New Zealand's residents, making it the most populous island in Polynesia and the List of islands by population, 28th-most-populous island in the world. Twelve main urban areas (half of them officially cities) are in the North Island. From north to south, they are Whangārei, Auckland, Hamilton, New Zealand, Hamilton, Tauranga, Rotorua, Gisborne, New Zealand, Gisborne, New Plymouth, Napier, New Zealand, Napier, Hastings, New Zealand, Hastings, Whanganui, Palmerston North, and New Zealand's capital city Wellington, which is located at the south-west tip of the island. Naming and usage The island has been known ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haroharo Caldera
The Haroharo Caldera (Haroharo volcanic complex) is a postulated volcanic feature in Taupō Volcanic Zone of the North Island, New Zealand within the larger and older Ōkataina Caldera. Since 2010 further studies have tended to use the terms Haroharo vent alignment, Utu Caldera, Matahina Caldera, Rotoiti Caldera and a postulated Kawerau Caldera to the features assigned to it. However the name is used in the peer reviewed literature to summarise and group these features based on gravitational and magnetic features. Geography In the north the Haroharo Caldera has been mapped as extending from the eastern half of Lake Rotoiti to the western border of Lake Rotomā. Its southern extent was defined by the Tarawera volcano. A recent analysis is consistent with the south western structural boundary of the older single event caldera's being in the eastern portions of Lake Tarawera. Both the Ōkāreka Embayment and the Tarawera Volcanic Complex are adjacent, so many, especially ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Tarawera
Lake Tarawera is the largest of a series of lakes which surround the volcano Mount Tarawera in the North Island of New Zealand. Like the mountain, it lies within the Ōkataina Caldera. It is located to the east of Rotorua, and beneath the peaks of the Tarawera massif i.e. Wahanga, Ruawahia, Tarawera and Koa. Tarawera means "Burnt Spear", named by a visiting hunter who left his bird spears in a hut and on returning the following season found that both his spears and hut had been turned to ashes. Geography Lake Tarawera is above sea level, and has a surface area of . To the north-west is Lake Ōkataina, to the west as you go south, lakes Lake Ōkareka, Ōkāreka, Lake Tikitapu, Tikitapu and Lake Rotokākahi, Rotokākahi and to the south-east Lake Rotomahana. Lake Tarawera township is on the western shore, between Lake Tarawera and Lake Ōkāreka. The main road access is from Rotorua to the west. The lake was substantially affected by the 1886 eruption of Mount Tarawera, erupt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Ōkataina
Lake Ōkataina (also spelled Okataina; or ) is the northernmost and largest of four smaller lakes lying between Lake Rotorua and Lake Tarawera in the Bay of Plenty Region of New Zealand's North Island. The others are Lake Rotokākahi (Green Lake), Lake Tikitapu (Blue Lake), and Lake Ōkareka. All lie within the Ōkataina caldera, along its western edge. Geography Unlike many other lakes in the region, Lake Ōkataina is completely encircled by native forest. Over the past 30 years, the level of the lake has risen and fallen in a range of about 5 metres. The mean autumn lake level is . The lake can be accessed by road via Hinehopu on the southern shores of Lake Rotoiti. At the end of the road there is a large sandy beach, a massive grassed area and the privately owned Okataina Lodge. Due to changes in the surface level of the lake, the lodge jetty has at times been either completely submerged or left high and dry. On its south-western arm is a small island, Motuwhet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Ōkareka
Lake Ōkāreka (also spelled Okareka, Ōkareka and just termed ) is one of four small lakes lying between Lake Rotorua and Lake Tarawera, in the Bay of Plenty Region of New Zealand's North Island. The others are Lake Rotokākahi (Green Lake), Lake Tikitapu (Blue Lake), and Lake Ōkataina. All lie within the Ōkataina Caldera, along its western edge. Geography The lake has a circumference of and with an autumn mean lake level of , lies about above Lake Tarawera. Its outlet flows underground for half a mile and forms the Waitangi waterfall. Lake Ōkāreka seems to be connected with Tarawera by underground channels. About in all, flows from Lake Ōkareka's catchment into Lake Tarawera. The lake's maximum height is now regulated to by adjusting a valve in the Waitangi Stream Drain. Geology The lake is closely related to the Ōkareka Embayment on the western margins of the Ōkataina Caldera. Likely formative and modifying eruptions were the Te Rere rhyolite eruption of 25,171 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Puhipuhi Basin
The Puhipuhi Embayment (also Puhipuhi Basin) is a volcanic feature in Taupō Volcanic Zone of New Zealand associated with the collapse of the Ōkataina Caldera wall to its west. Its latest significant volcanic eruption was about 31,500 years ago and this dating required a reassessment of recent activity at the Eastern extension of the Tarawera vent alignment. Geography The Puhipuhi Embayment extends from the eastern margin of Mount Tarawera towards Kawerau including land mostly devoted to the Tarawera Forest portion of the Kaingaroa Forest. The basin is a dissected plateau at about above sea level. The Tarawera River cuts through the north of the basin and is its drainage. Geology Both the Pupipuhi Embayment and the Tarawera Volcanic Complex are part of the Ōkataina Volcanic Centre. There is a long eruptive history with the likelihood that some of the 13 Mangaone Subgroup eruptions were from vents in the embayment and the only dacite eruptives from this centre occur in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Tarawera
Mount Tarawera is a volcano on the North Island of New Zealand within the older but volcanically productive Ōkataina Caldera. Located 24 kilometres southeast of Rotorua, it consists of a series of rhyolitic lava domes that were fissured down the middle by an explosive basaltic eruption in 1886. While the 1886 eruption was basaltic, study has shown there was only a small basalt component to the previous recent rhyolitic predominant eruptions. This eruption was one of New Zealand's largest historical eruptions, and killed an estimated 120 people. The fissures run for about northeast–southwest. The volcano's component domes include Ruawahia Dome (the highest at 1,111 metres), Tarawera Dome and Wahanga Dome. It is surrounded by several lakes, most of which were created or drastically altered by the 1886 eruption. These include Lakes Tarawera, Rotomahana, Rerewhakaaitu, Ōkataina, Ōkareka, Tikitapu / Blue and Rotokākahi / Green. The Tarawera River runs nort ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Rotomā
Lake Rotomā (also spelled Rotoma) is the fourth largest lake of the 11 lakes in the Rotorua Lakes district in the Bay of Plenty Region of New Zealand's North Island. Lake Rotomā is the easternmost in the chain of three lakes to the northeast of Lake Rotorua The other two are Lake Rotoiti and Lake Rotoehu. Rotomā is located halfway between the city of Rotorua and town of Whakatāne. Lake Rotomā has a high water quality with visibility up to around 13 metres deep. The lake has a maximum depth of 83 metres in the northern part and 73.5 metres in the southern part. Geography Lake Rotomā was formed within the Rotomā Caldera when lava flows from a large crater explosion blocked its outlet 9,500 years ago. The hills fringing the south and east of the lake are made up of rhyolite from eruptions from its own caldera, the Haroharo and Tarawera vent alignments, all in the Ōkataina Volcanic Centre. Inflow is from rainfall, three small streams and several springs around the l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Rotoiti (Bay Of Plenty)
Lake Rotoiti is a lake in the Bay of Plenty region of New Zealand. It is the northwesternmost in a chain of lakes formed within the Ōkataina Caldera. The lake is close to the northern shore of its more famous neighbour, Lake Rotorua, and is connected to it via the Ohau Channel. It drains to the Kaituna River, which flows into the Bay of Plenty near Maketu. The full name of the lake is Te Rotoiti-kite-a-Īhenga, which in the Māori language means "The Small Lake Discovered by Īhenga", the Māori people, Māori explorer also credited with discovering Lake Rotorua. Legend says that the lake was named as such because when Ihenga first saw it, he could only see a small part of it and thought the lake was a lot smaller. Since the 1960s, the quality of lake water has been negatively affected by inflows of nitrogen rich water from Lake Rotorua, agricultural run-off from surrounding farms and seepage from domestic septic tanks. The effects of this included an almost permanent algal b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Te Ara - Encyclopedia Of New Zealand
''Te Ara: The Encyclopedia of New Zealand'' is an online encyclopedia established in 2001 by the New Zealand Government's Ministry for Culture and Heritage. The web-based content was developed in stages over the next several years; the first sections were published in 2005, and the last in 2014 marking its completion. ''Te Ara'' means "the pathway" in the Māori language, and contains over three million words in articles from over 450 authors. Over 30,000 images and video clips are included from thousands of contributors. History New Zealand's first recognisable encyclopedia was ''The Cyclopedia of New Zealand'', a commercial venture compiled and published between 1897 and 1908 in which businesses or people usually paid to be covered. In 1966 the New Zealand Government published ''An Encyclopaedia of New Zealand'', its first official encyclopedia, in three volumes. Although now superseded by ''Te Ara'', its historical importance led to its inclusion as a separate digital reso ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Rotomahana
Lake Rotomahana is an lake in northern New Zealand, located 20 kilometres to the south-east of Rotorua. It is immediately south-west of the dormant volcano Mount Tarawera, and its geography was substantially altered by a major 1886 eruption of Mount Tarawera. Along with the mountain, it lies within the Ōkataina Caldera. It is the most recently formed larger natural lake in New Zealand, and the deepest in the Rotorua district. History The New Zealand Ministry for Culture and Heritage gives a translation of "warm lake" for , following Hochstetter. and the surrounds of the lake had become world famous following its first European written description in 1843. Geology Lake Rotomahana is one of the most studied lakes in New Zealand, occupying the southwestern portion of a rift which formed during the 1886 eruption of Mount Tarawera. In the context of the geological discussion, a high standard hydrophonic survey took place in 2016 and the absolute measurements taken at this time, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
