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Geology Of The Waikato-King Country Region
The Waikato and King Country regions of New Zealand are built upon a basement of greywacke rocks, which form many of the hills. Much of the land to the west of the Waikato River and in the King Country to the south has been covered by limestone and sandstone, forming bluffs and a karst landscape. The volcanic cones of Karioi and Pirongia dominate the landscape near Raglan and Kawhia Harbours. To the east, the land has been covered with ignimbrite deposits from the Taupo Volcanic Zone. Large amounts of pumice from the Taupo Volcanic Zone have been deposited in the Waikato Basin and Hauraki Plains. Basement rocks As with most of New Zealand, the basement rocks of the Waikato Region and King Country are composed of greywacke (indurated sandstone, siltstone and mudstone). The Waipa Fault passes north–south through the Waikato-King Country region, from Taupiri, along the Waipā River, and south to near Ohura. It represents a major dividing line between different terranes. Murih ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waikato Region
Waikato () is a local government region of the upper North Island of New Zealand. It covers the Waikato District, Waipa District, Matamata-Piako District, South Waikato District and Hamilton City, as well as Hauraki, Coromandel Peninsula, the northern King Country, much of the Taupō District, and parts of Rotorua District. It is governed by the Waikato Regional Council. The region stretches from Coromandel Peninsula in the north, to the north-eastern slopes of Mount Ruapehu in the south, and spans the North Island from the west coast, through the Waikato and Hauraki to Coromandel Peninsula on the east coast. Broadly, the extent of the region is the Waikato River catchment. Other major catchments are those of the Waihou, Piako, Awakino and Mokau rivers. The region is bounded by Auckland on the north, Bay of Plenty on the east, Hawke's Bay on the south-east, and Manawatū-Whanganui and Taranaki on the south. Waikato Region is the fourth largest region in the country in a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hakarimata Range
Hakarimata Range is a range of hills on the western edge of Ngāruawāhia township, Retrieved 2016 in the Waikato region of New Zealand, overlooking the confluence of the Waikato and Waipā Rivers. The Hakarimata Range is separated from the Taupiri Range by the Taupiri Gorge, through which the Waikato River flows. After the invasion of the Waikato, parts of the Hakarimatas were confiscated in 1864. of native forest on the range are protected as a scenic reserve. A council supported community group, the Hakarimata Restoration Trust, created in 2001, is helping care for the range. Location Although now usually applied to the hills immediately west of Ngāruawāhia, maps such as Hochstetter's of 1859, the 1925 geology map and 1944 one inch map show 'Hakarimata Range' as extending south to what is now SH23. Similarly, old accounts describe the Whatawhata- Raglan road as passing over the Hakarimatas. Name Hakarimata's name derives from a 17th-century feast, when Ngāti Maniapot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetic Anomaly
In geophysics, a magnetic anomaly is a local variation in the Earth's magnetic field resulting from variations in the chemistry or magnetism of the rocks. Mapping of variation over an area is valuable in detecting structures obscured by overlying material. The magnetic variation (geomagnetic reversals) in successive bands of ocean floor parallel with mid-ocean ridges was important evidence for seafloor spreading, a concept central to the theory of plate tectonics. Measurement Magnetic anomalies are generally a small fraction of the magnetic field. The total field ranges from 25,000 to 65,000 nanoteslas (nT). To measure anomalies, magnetometers need a sensitivity of 10 nT or less. There are three main types of magnetometer used to measure magnetic anomalies: # The fluxgate magnetometer was developed during World War II to detect submarines. It measures the component along a particular axis of the sensor, so it needs to be oriented. On land, it is often oriented vertically, wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waipapa Composite Terrane
Waipapa is a small town in the Bay of Islands, Northland, New Zealand. It is around 10 minutes drive from Kerikeri, the nearest urban centre to Waipapa, located on State Highway 10. Waipapa itself has no school and most people travel into Kerikeri on a daily basis. It is governed by the Far North District council. Demographics Statistics New Zealand describes Waipapa as a rural settlement. It covers . The settlement is part of the larger Waipapa statistical area. Waipapa settlement had a population of 174 at the 2018 New Zealand census, an increase of 3 people (1.8%) since the 2013 census, and an increase of 45 people (34.9%) since the 2006 census. There were 51 households, comprising 81 males and 93 females, giving a sex ratio of 0.87 males per female. The median age was 28.1 years (compared with 37.4 years nationally), with 57 people (32.8%) aged under 15 years, 42 (24.1%) aged 15 to 29, 60 (34.5%) aged 30 to 64, and 21 (12.1%) aged 65 or older. Ethnicities were 65.5% E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dun Mountain-Maitai Terrane
The Dun Mountain-Maitai Terrane comprises the Dun Mountain Ophiolite Belt (also called the Mineral Belt), Maitai Group and Patuki Mélange. The Dun Mountain Ophiolite is an ophiolite of Permian age located in New Zealand's South Island. Prehistorically this ophiolite was quarried by Māori for both metasomatized argillite and pounamu (jade) which was used in the production of tools and jewellery. In the late 1800s, the Dun Mountain Ophiolite Belt was surveyed for its economic potential. During this time the rock types dunite and rodingite (after Dun Mountain and the Roding River) were first named. Discovery of economic deposits of chromite near Nelson lead to the building of New Zealand’s first railway, however, extraction only occurred between 1862 and 1866. In the 20th century, serpentinite was mined for fertiliser and the ophiolite remains one of New Zealand's main sources of pounamu (jade), but all other mineral exploration has failed to find economic deposits. Description ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late Jurassic
The Late Jurassic is the third epoch of the Jurassic Period, and it spans the geologic time from 163.5 ± 1.0 to 145.0 ± 0.8 million years ago (Ma), which is preserved in Upper Jurassic strata.Owen 1987. In European lithostratigraphy, the name "Malm" indicates rocks of Late Jurassic age. In the past, ''Malm'' was also used to indicate the unit of geological time, but this usage is now discouraged to make a clear distinction between lithostratigraphic and geochronologic/chronostratigraphic units. Subdivisions The Late Jurassic is divided into three ages, which correspond with the three (faunal) stages of Upper Jurassic rock: Paleogeography During the Late Jurassic Epoch, Pangaea broke up into two supercontinents, Laurasia to the north, and Gondwana to the south. The result of this break-up was the spawning of the Atlantic Ocean. However, at this time, the Atlantic Ocean was relatively narrow. Life forms of the epoch This epoch is well known for many famous types of dinosau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late Triassic
The Late Triassic is the third and final epoch (geology), epoch of the Triassic geologic time scale, Period in the geologic time scale, spanning the time between annum, Ma and Ma (million years ago). It is preceded by the Middle Triassic Epoch and followed by the Early Jurassic Epoch. The corresponding series (stratigraphy), series of rock beds is known as the Upper Triassic. The Late Triassic is divided into the Carnian, Norian and Rhaetian Geologic time scale, Ages. Many of the first dinosaurs evolved during the Late Triassic, including ''Plateosaurus'', ''Coelophysis'', and ''Eoraptor''. The Triassic–Jurassic extinction event began during this epoch and is one of the five major mass extinction events of the Earth. Etymology The Triassic was named in 1834 by Friedrich August von Namoh, Friedrich von Alberti, after a succession of three distinct rock layers (Greek meaning 'triad') that are widespread in southern Germany: the lower Buntsandstein (colourful sandstone'')'', t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Forearc
Forearc is a plate tectonic term referring to a region between an oceanic trench, also known as a subduction zone, and the associated volcanic arc. Forearc regions are present along a convergent margins and eponymously form 'in front of' the volcanic arcs that are characteristic of convergent plate margins. A back-arc region is the companion region behind the volcanic arc. Many forearcs have an accretionary wedge which may form a topographic ridge known as an outer arc ridge that parallels the volcanic arc. Between the accretionary wedge and the volcanic arc a forearc basin, sometimes referred to as an outer arc trough, may be present and can accumulate thick deposits of sediment. Due to tectonic stresses as one tectonic plate rides over another, forearc regions are sources for great thrust earthquakes. Formation During subduction, an oceanic plate is thrust below another tectonic plate, which may be oceanic or continental. Water and other volatiles in the down-going plat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcano
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and most are found underwater. For example, a mid-ocean ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates whereas the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates. Volcanoes can also form where there is stretching and thinning of the crust's plates, such as in the East African Rift and the Wells Gray-Clearwater volcanic field and Rio Grande rift in North America. Volcanism away from plate boundaries has been postulated to arise from upwelling diapirs from the core–mantle boundary, deep in the Earth. This results in hotspot volcanism, of which the Hawaiian hotspot is an example. Volcanoes are usually not created where two tectonic plates slide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Awakino
Awakino is a settlement in the south of Waitomo District, in the North Island of New Zealand. It is located on State Highway 3 at the mouth of the Awakino River, five kilometres north of Mokau. It is 79 km southwest of Te Kuiti, and 98 km northeast of New Plymouth. North of Awakino, State Highway 3 turns inland, and the coast is largely unpopulated. Beyond Awakino there are no settlements of any size on the coast south of the Kawhia Harbour. The New Zealand Ministry for Culture and Heritage gives a translation of "bad creek" for ''Awakino''. The local Maniaroa Marae and meeting house are affiliated with the Ngāti Maniapoto hapū of Ngāti Rākei, Rungaterangi and Waiora. Awakino is in meshblocks 1016500 and 1016900, which had a population of 51 people in the 2018 census. References Further reading General historical works :* :* :* Business history :*Records for the Awakino Co-operative Dairy Company Ltd. ''(active 1911–1925; liquidated 1935)'' are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
