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Whangārei Volcanic Field
The Whangārei volcanic field (Puhipuhi-Whangarei volcanic field) is an area of intra-plate monogenetic volcanism located near the city of Whangārei, North Island, New Zealand. It was last active between 260,000 to 319,000 years ago and continues to be potentially active as a low-velocity seismic zone in the crust exists beneath Whangārei, which is interpreted to be a body of partial melt. This mantle source has been coupled to the lithosphere for about 8 million years. As the field has potentially been active at low frequency for millions of years, with 100,000 years or more between events it might best be regarded as dormant. The recent vents active in the last million years include some dacite in composition. Composition details are freely available for most of the field but many vents do not have ages. Geology Volcanics These volcanoes are part of the eastern Northland volcanic belt which includes the monogenetic Kaikohe-Bay of Islands volcanic field and the volcano ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pliocene
The Pliocene ( ; also Pleiocene) is the epoch in the geologic time scale that extends from 5.333 million to 2.58See the 2014 version of the ICS geologic time scale million years ago. It is the second and most recent epoch of the Neogene Period in the . The Pliocene follows the Epoch and is followed by the Epoch. Prior to the 2009 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dacite
Dacite () is a volcanic rock formed by rapid solidification of lava that is high in silica and low in alkali metal oxides. It has a fine-grained (aphanitic) to porphyritic texture and is intermediate in composition between andesite and rhyolite. It is composed predominantly of plagioclase feldspar and quartz. Dacite is relatively common, occurring in many tectonic settings. It is associated with andesite and rhyolite as part of the subalkaline volcanic rock, subalkaline tholeiite, tholeiitic and calc-alkaline magma series. Composition Dacite consists mostly of plagioclase feldspar and quartz with biotite, hornblende, and pyroxene (augite or enstatite). The quartz appears as rounded, corroded phenocrysts, or as an element of the ground-mass. The plagioclase in dacite ranges from oligoclase to andesine and labradorite. Sanidine occurs, although in small proportions, in some dacites, and when abundant gives rise to rocks that form rhyodacite, transitions to the rhyolites. The rel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landforms Of The Northland Region
A landform is a natural or anthropogenic land feature on the solid surface of the Earth or other planetary body. Landforms together make up a given terrain, and their arrangement in the landscape is known as topography. Landforms include hills, mountains, canyons, and valleys, as well as shoreline features such as bays, peninsulas, and seas, including submerged features such as mid-ocean ridges, volcanoes, and the great ocean basins. Physical characteristics Landforms are categorized by characteristic physical attributes such as elevation, slope, orientation, stratification, rock exposure and soil type. Gross physical features or landforms include intuitive elements such as berms, mounds, hills, ridges, cliffs, valleys, rivers, peninsulas, volcanoes, and numerous other structural and size-scaled (e.g. ponds vs. lakes, hills vs. mountains) elements including various kinds of inland and oceanic waterbodies and sub-surface features. Mountains, hills, plateaux, and plains are the fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanism Of New Zealand
The volcanism of New Zealand has been responsible for many of the country's geographical features, especially in the North Island and the country's outlying islands. While the land's volcanism dates back to before the Zealandia microcontinent rifted away from Gondwana 60–130 million years ago, activity continues today with minor eruptions occurring every few years. This recent activity is primarily due to the country's position on the boundary between the Indo-Australian and Pacific Plates, a part of the Pacific Ring of Fire, and particularly the subduction of the Pacific Plate under the Indo-Australian Plate. New Zealand's rocks record examples of almost every kind of volcanism observed on Earth, including some of the world's largest eruptions in geologically recent times. None of the South Island's volcanoes are active. Major eruptions New Zealand has been the site of many large explosive eruptions during the last two million years, including several of supervol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Onerahi Aerial
Onerahi, for half a century known as Grahamtown, is a seaside suburb of Whangārei, New Zealand's northernmost city. It is the city's only seaside suburb. It is located 9 km south-east of the centre of Whangārei and is principally a peninsula in the Whangārei Harbour, which empties into the Pacific Ocean. The New Zealand Ministry for Culture and Heritage gives a translation of "long beach" for ''Onerahi''. The suburb's main feature is Whangarei Airport, located on the large flat area at the southern end of the suburb, which was built up using material from the site of a former Māori pā (fortress) just to the north. There are two concentric roads around the seaward plateau; the upper one surrounds the airport, and the lower follows the coast. The suburb is connected to Whangarei via the Onerahi Causeway. Close to the suburb in the harbour is Motu Matakohe or Limestone Island, now being managed to restore its ecosystems. Public transport in Onerahi solely consists o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Onerahi
Onerahi, for half a century known as Grahamtown, is a seaside suburb of Whangārei, New Zealand's northernmost city. It is the city's only seaside suburb. It is located 9 km south-east of the centre of Whangārei and is principally a peninsula in the Whangārei Harbour, which empties into the Pacific Ocean. The New Zealand Ministry for Culture and Heritage gives a translation of "long beach" for ''Onerahi''. The suburb's main feature is Whangarei Airport, located on the large flat area at the southern end of the suburb, which was built up using material from the site of a former Māori pā (fortress) just to the north. There are two concentric roads around the seaward plateau; the upper one surrounds the airport, and the lower follows the coast. The suburb is connected to Whangarei via the Onerahi Causeway. Close to the suburb in the harbour is Motu Matakohe or Limestone Island, now being managed to restore its ecosystems. Public transport in Onerahi solely consists o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maungatapere
Maungatapere is a settlement in Northland, New Zealand. State Highway 14 runs through it. Whangārei is 11 km to the east, and Tangiteroria is 18 km to the south west. The settlement takes its name from a rounded volcanic peak of the same name (a Maori name meaning "meeting house by the mountain") that lies to the southwest, and has a summit 359 meters above sea level. Maungatapere is at the junction of State Highways 14 and 15. Maungatapere is the antipode of the city of Tangier, Morocco. History Thomas Elmsley bought of land in Maungatapere and northern Wairoa from Te Tirarau Kukupa in 1839, and in 1840 he and the brothers Henry and Charles Walton came with workers to establish farms in the area. Henry Walton's farm was on the slopes of Maungatapere Mountain and was called "Maungatapere Park". After the Flagstaff War, Walton employed former soldiers to build stone walls which are still a feature of the area. Henry Walton married Kohura, Te Tirarau Kukupa's niece ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maungakaramea
Maungakaramea is a locality in Northland, New Zealand. Whangārei is to the northeast. Local features include Tangihua Forest, Maungakaramea Sports Club and Mid Western Rugby Club. History and culture The name Maungakaramea was given to the area by local Māori. There are two interpretations of the meaning of the name, one is that "Karamea" means speargrass (Aciphylla), hence the "speargrass mountain", the other is that Karamea is a coloured clay of a reddish type used for war paint on the face and body. A safe interpretation is "Red Ochre Mountain". The area from Whangarei to Waipu, Waihonga and Tangihua, was taken from Ngaitahuhu by a Ngapuhi chief, Te Ponaharakeke, who joined with Te Ngarokiteuru to drive all the Ngaitahuhu out in the mid-18th century. The first record of a European settler in the Maungakaramea area was in 1820 when the Reverend Samuel Marsden encountered a Māori tribe whilst travelling overland via the Kaipara Harbour. The Maungakaramea blocks were ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parihaka Te Maunga
Parihaka is a community in the Taranaki region of New Zealand, located between Mount Taranaki and the Tasman Sea. In the 1870s and 1880s the settlement, then reputed to be the largest Māori village in New Zealand, became the centre of a major campaign of non-violent resistance to European occupation of confiscated land in the area. Armed soldiers were sent in and arrested the peaceful resistance leaders and many of the Maori residents, often holding them in jail for months without trials. The village was founded about 1866 by Māori chiefs Te Whiti o Rongomai and Tohu Kākahi on land seized by the government during the post- New Zealand Wars land confiscations of the 1860s. The population of the village grew to more than 2,000, attracting Māori who had been dispossessed of their land by confiscations and impressing European visitors with its cleanliness and industry, and its extensive cultivations producing cash crops as well as food sufficient to feed its inhabitants. Wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hurupaki Mountain
Hurupaki Mountain is in Kamo, Whangārei, New Zealand. The centre of Hurupaki Mountain lies between Three Mile Bush Road and Dip Road, approximately 1.5 kilometres west of Kamo township. Hurupaki Mountain is visible from State Highway 1. Characteristics Hurupaki Mountain is a high scoria cone whose associated basalt lava has been dated at 310,000 years old. It is part of the Puhipuhi-Whangarei volcanic field. This volcanic area is similar to the Auckland volcanic field in that it has formed over a type of hot spot in the mantle, i.e. not at a current plate boundary. The Whangārei field is older than the Auckland field, and Hurupaki is probably one of the younger centres. There is another basaltic field in Northland Northland may refer to: Corporations * Northland Organic Foods Corporation, headquartered in Saint Paul, Minnesota * Northland Resources, a mining business * Northland Communications, an American cable television, telephone and internet service ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kamo, New Zealand
Kamo is a suburb in Northern Whangārei. approximately five minutes drive from the Whangārei CBD. The name comes from a Māori word meaning "eyelash", but has also been said to mean "to bubble up", referring to hot springs in the area. Mount Parakiore is a volcanic dome rising 391 m to the northwest of the town. It is about one million years old, and part of the Harbour Fault which also includes Mount Hikurangi near Hikurangi, and Parihaka in Whangārei. History Coal mining was an early industry in the area. Tunnelling first started in 1875, but it was not practical to carry the coal over the unmetalled roads to Whangārei wharf. In 1882 a short railway line was completed between Kamo and Whangārei to carry the coal. This was one of Northland's first railways. The railway still exists as part of the North Auckland Line. The mine closed in 1955, with the seams worked out. Limonite was also quarried at Kamo. A Wesleyan church was built in 1881, the Anglican All Saints Church ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Basalt
Basalt (; ) is an aphanite, aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the planetary surface, surface of a terrestrial planet, rocky planet or natural satellite, moon. More than 90% of all volcanic rock on Earth is basalt. Rapid-cooling, fine-grained basalt is chemically equivalent to slow-cooling, coarse-grained gabbro. The eruption of basalt lava is observed by geologists at about 20 volcanoes per year. Basalt is also an important rock type on other planetary bodies in the Solar System. For example, the bulk of the plains of volcanism on Venus, Venus, which cover ~80% of the surface, are basaltic; the lunar mare, lunar maria are plains of flood-basaltic lava flows; and basalt is a common rock on the surface of Mars. Molten basalt lava has a low viscosity due to its relatively low silica content (between 45% and 52%), resulting in rapidly moving lava flo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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