77-547: The Ōrangipuku River is a river of the West Coast Region of New Zealand's South Island . It flows north into the southern end of Lake Brunner . The Taramakau River crosses the Alpine Fault at Inchbonnie . At this point, it has in its history flowed in three different directions: westwards along its present course, northwards towards and into Lake Brunner via the Ōrangipuku River, and northeast through Lake Poerua ,
154-512: A cyclothem . Cyclothems are thought to have their origin in glacial cycles that produced fluctuations in sea level , which alternately exposed and then flooded large areas of continental shelf. The woody tissue of plants is composed mainly of cellulose, hemicellulose, and lignin. Modern peat is mostly lignin, with a content of cellulose and hemicellulose ranging from 5% to 40%. Various other organic compounds, such as waxes and nitrogen- and sulfur-containing compounds, are also present. Lignin has
231-603: A population of just 32,900 people, the West Coast is the least populous region in New Zealand. The population in the region grew by 0.4% over the year to July 2023. The region has a rich and important history. The land itself is ancient, stretching back to the Carboniferous period ; this is evident by the amount of carboniferous materials naturally found there, especially coal . First settled by Kāi Tahu in approximately 1200 AD,
308-417: A process called carbonization . Carbonization proceeds primarily by dehydration , decarboxylation , and demethanation. Dehydration removes water molecules from the maturing coal via reactions such as Decarboxylation removes carbon dioxide from the maturing coal: while demethanation proceeds by reaction such as In these formulas, R represents the remainder of a cellulose or lignin molecule to which
385-838: A proposal was developed to construct a stopbank along the north bank of the Taramakau River. In 1953 a small project involving 60 m (200 ft) of tree protection and 80 m (260 ft) of rockwork and was approved. However, by 1958, erosion had progressed to the point that there was only 5 m (16 ft) of land remaining between the Taramakau and Ōrangipuku Rivers, and emergency works were required. A report prepared in March 1959 recommended construction of 2.5 kilometres (1.6 mi) of new stopbanks, strengthening and raising 1.2 kilometres (0.75 mi) of existing stopbanks, plus 2.5 kilometres (1.6 mi) of new rock rip rap , and diverting
462-527: A switch in fuels happened in London in the late sixteenth and early seventeenth centuries. Historian Ruth Goodman has traced the socioeconomic effects of that switch and its later spread throughout Britain and suggested that its importance in shaping the industrial adoption of coal has been previously underappreciated. The development of the Industrial Revolution led to the large-scale use of coal, as
539-403: A weight basis. This composition reflects partly the composition of the precursor plants. The second main fraction of coal is ash, an undesirable, noncombustable mixture of inorganic minerals. The composition of ash is often discussed in terms of oxides obtained after combustion in air: Of particular interest is the sulfur content of coal, which can vary from less than 1% to as much as 4%. Most of
616-406: A weight composition of about 54% carbon, 6% hydrogen, and 30% oxygen, while cellulose has a weight composition of about 44% carbon, 6% hydrogen, and 49% oxygen. Bituminous coal has a composition of about 84.4% carbon, 5.4% hydrogen, 6.7% oxygen, 1.7% nitrogen, and 1.8% sulfur, on a weight basis. The low oxygen content of coal shows that coalification removed most of the oxygen and much of the hydrogen
693-418: Is 40% of total fossil fuel emissions and over 25% of total global greenhouse gas emissions . As part of worldwide energy transition , many countries have reduced or eliminated their use of coal power . The United Nations Secretary General asked governments to stop building new coal plants by 2020. Global coal use was 8.3 billion tonnes in 2022, and is set to remain at record levels in 2023. To meet
770-625: Is also a cognate via the Indo-European root. The conversion of dead vegetation into coal is called coalification . At various times in the geologic past, the Earth had dense forests in low-lying areas. In these wetlands, the process of coalification began when dead plant matter was protected from oxidation , usually by mud or acidic water, and was converted into peat . The resulting peat bogs , which trapped immense amounts of carbon, were eventually deeply buried by sediments. Then, over millions of years,
847-506: Is at Shantytown . Other towns and settlements include: The West Coast region is governed by the West Coast Regional Council. Currently, it is chaired by Peter Haddock. The subnational gross domestic product (GDP) of the West Coast was estimated at NZ$ 2,373 million in the year to March 2022, 0.7% of New Zealand's national GDP. The regional GDP per capita was estimated at $ 72,127 in the same period. The region had one of
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#1732851055148924-429: Is burned in a turbine). Hot exhaust gases from the turbine are used to raise steam in a heat recovery steam generator which powers a supplemental steam turbine . The overall plant efficiency when used to provide combined heat and power can reach as much as 94%. IGCC power plants emit less local pollution than conventional pulverized coal-fueled plants. Other ways to use coal are as coal-water slurry fuel (CWS), which
1001-411: Is converted into coal by the heat and pressure of deep burial over millions of years. Vast deposits of coal originate in former wetlands called coal forests that covered much of the Earth's tropical land areas during the late Carboniferous ( Pennsylvanian ) and Permian times. Coal is used primarily as a fuel. While coal has been known and used for thousands of years, its usage was limited until
1078-594: Is entirely vertical; however, metamorphism may cause lateral changes of rank, irrespective of depth. For example, some of the coal seams of the Madrid, New Mexico coal field were partially converted to anthracite by contact metamorphism from an igneous sill while the remainder of the seams remained as bituminous coal. The earliest recognized use is from the Shenyang area of China where by 4000 BC Neolithic inhabitants had begun carving ornaments from black lignite. Coal from
1155-874: Is in Greymouth. The region has been included in the "Top 10 Coastal Drives of the World" by Lonely Planet . The region has the only New Zealand nesting place of the kōtuku (white heron) , at the Waitangiroto Nature Reserve , visited by tours from the small farming township of Whataroa . This rare bird appears on the $ 2 coin. Over 80% of West Coast land is administered by the Department of Conservation, much of this being in National Parks. These include from north to south, parts of Kahurangi NP, Paparoa NP, parts of Arthurs Pass NP, Westland NP, parts of Aspiring NP plus
1232-455: Is made when metallurgical coal (also known as coking coal ) is baked in an oven without oxygen at temperatures as high as 1,000 °C, driving off the volatile constituents and fusing together the fixed carbon and residual ash. Metallurgical coke is used as a fuel and as a reducing agent in smelting iron ore in a blast furnace . The carbon monoxide produced by its combustion reduces hematite (an iron oxide ) to iron. Pig iron , which
1309-409: Is more abundant, and anthracite. The % carbon in coal follows the order anthracite > bituminous > lignite > brown coal. The fuel value of coal varies in the same order. Some anthracite deposits contain pure carbon in the form of graphite . For bituminous coal, the elemental composition on a dry, ash-free basis of 84.4% carbon, 5.4% hydrogen, 6.7% oxygen, 1.7% nitrogen, and 1.8% sulfur, on
1386-538: Is the least populous of New Zealand's sixteen regions. The West Coast is also the most sparsely populated region, with just 1.50 people per square kilometre (3.88 per square mile). West Coast Region had a population of 33,390 in the 2023 New Zealand census , an increase of 1,815 people (5.7%) since the 2018 census , and an increase of 1,242 people (3.9%) since the 2013 census . There were 17,031 males, 16,245 females and 117 people of other genders in 14,793 dwellings. 2.7% of people identified as LGBTIQ+ . The median age
1463-546: Is the only region of New Zealand where coal mining is still widely practiced. The name Westland is used by some New Zealanders to refer to the whole of the West Coast, including Grey District , Buller District and Fiordland , and can also refer to the short-lived Westland Province of 1873–76. Fiordland is on the west coast, but is in the Southland Region rather than the West Coast Region. Inhabitants of
1540-452: Is used as fuel. 27.6% of world energy was supplied by coal in 2017 and Asia used almost three-quarters of it. Other large-scale applications also exist. The energy density of coal is roughly 24 megajoules per kilogram (approximately 6.7 kilowatt-hours per kg). For a coal power plant with a 40% efficiency, it takes an estimated 325 kg (717 lb) of coal to power a 100 W lightbulb for one year. In 2022, 68% of global coal use
1617-691: The Bronze Age (3000–2000 BC), where it formed part of funeral pyres . In Roman Britain , with the exception of two modern fields, "the Romans were exploiting coals in all the major coalfields in England and Wales by the end of the second century AD". Evidence of trade in coal, dated to about AD 200, has been found at the Roman settlement at Heronbridge , near Chester ; and in the Fenlands of East Anglia , where coal from
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#17328510551481694-729: The Canterbury Plains and in the Firth of Thames , they have been almost completely destroyed for settlement and agriculture. Scenic areas include the Haast Pass , Fox and Franz Josef Glaciers , Hokitika Gorge , Lake Brunner , the Pancake Rocks at Punakaiki , the Oparara Arches and the Heaphy Track . The region has very high rainfall due to the prevailing northwesterly wind pattern and
1771-512: The Fushun mine in northeastern China was used to smelt copper as early as 1000 BC. Marco Polo , the Italian who traveled to China in the 13th century, described coal as "black stones ... which burn like logs", and said coal was so plentiful, people could take three hot baths a week. In Europe, the earliest reference to the use of coal as fuel is from the geological treatise On Stones (Lap. 16) by
1848-571: The Industrial Revolution . With the invention of the steam engine , coal consumption increased. In 2020, coal supplied about a quarter of the world's primary energy and over a third of its electricity . Some iron and steel -making and other industrial processes burn coal. The extraction and burning of coal damages the environment , causing premature death and illness, and it is the largest anthropogenic source of carbon dioxide contributing to climate change . Fourteen billion tonnes of carbon dioxide were emitted by burning coal in 2020, which
1925-590: The Midlands was transported via the Car Dyke for use in drying grain. Coal cinders have been found in the hearths of villas and Roman forts , particularly in Northumberland , dated to around AD 400. In the west of England, contemporary writers described the wonder of a permanent brazier of coal on the altar of Minerva at Aquae Sulis (modern day Bath ), although in fact easily accessible surface coal from what became
2002-529: The Paris Agreement target of keeping global warming below 2 °C (3.6 °F) coal use needs to halve from 2020 to 2030, and "phasing down" coal was agreed upon in the Glasgow Climate Pact . The largest consumer and importer of coal in 2020 was China , which accounts for almost half the world's annual coal production, followed by India with about a tenth. Indonesia and Australia export
2079-532: The Poerua River and the lower reaches of Crooked River into Lake Brunner. Inchbonnie is located on an alluvial fan that infills the three valleys. If the Taramakau River changed course at Inchbonnie, in addition to the damage to arable farming land, it would cause increased flows in the Arnold and Grey Rivers . The effective design capacity of existing flood protection works at Greymouth would be reduced, increasing
2156-702: The Somerset coalfield was in common use in quite lowly dwellings locally. Evidence of coal's use for iron -working in the city during the Roman period has been found. In Eschweiler , Rhineland , deposits of bituminous coal were used by the Romans for the smelting of iron ore . No evidence exists of coal being of great importance in Britain before about AD 1000, the High Middle Ages . Coal came to be referred to as "seacoal" in
2233-478: The Westland Province , until the abolition of the provincial system in 1876. The West Coast gold rush between 1864 and 1867 created numerous gold rush towns such as Ōkārito, which at one time was the largest town on the West Coast but quickly almost vanished as miners moved on. After that time, the population dwindled, but the main towns that still exist had become established. Following greenstone and gold,
2310-491: The coal gap in the Permian–Triassic extinction event , where coal is rare. Favorable geography alone does not explain the extensive Carboniferous coal beds. Other factors contributing to rapid coal deposition were high oxygen levels, above 30%, that promoted intense wildfires and formation of charcoal that was all but indigestible by decomposing organisms; high carbon dioxide levels that promoted plant growth; and
2387-444: The steam engine took over from the water wheel . In 1700, five-sixths of the world's coal was mined in Britain. Britain would have run out of suitable sites for watermills by the 1830s if coal had not been available as a source of energy. In 1947 there were some 750,000 miners in Britain, but the last deep coal mine in the UK closed in 2015. A grade between bituminous coal and anthracite
Ōrangipuku River - Misplaced Pages Continue
2464-407: The 13th century; the wharf where the material arrived in London was known as Seacoal Lane, so identified in a charter of King Henry III granted in 1253. Initially, the name was given because much coal was found on the shore, having fallen from the exposed coal seams on cliffs above or washed out of underwater coal outcrops, but by the time of Henry VIII , it was understood to derive from the way it
2541-399: The 2019–2020 season, there were 150,000 milking cows on the West Coast, 3.0% of the country's total herd. The cows produced 50,700 tonnes of milk solids, worth $ 365 million at the national average farmgate price ($ 7.20 per kg). Other industries are the manufacturing and sales of greenstone jewellery, sphagnum moss gathering and stone-collection for garden landscaping. Monteith's brewery
2618-578: The Carboniferous, and suggested that climatic and tectonic factors were a more plausible explanation, reconstruction of ancestral enzymes by phylogenetic analysis corroborated a hypothesis that lignin degrading enzymes appeared in fungi approximately 200 MYa. One likely tectonic factor was the Central Pangean Mountains , an enormous range running along the equator that reached its greatest elevation near this time. Climate modeling suggests that
2695-587: The Central Pangean Mountains contributed to the deposition of vast quantities of coal in the late Carboniferous. The mountains created an area of year-round heavy precipitation, with no dry season typical of a monsoon climate. This is necessary for the preservation of peat in coal swamps. Coal is known from Precambrian strata, which predate land plants. This coal is presumed to have originated from residues of algae. Sometimes coal seams (also known as coal beds) are interbedded with other sediments in
2772-563: The Greek scientist Theophrastus (c. 371–287 BC): Among the materials that are dug because they are useful, those known as anthrakes [coals] are made of earth, and, once set on fire, they burn like charcoal [anthrakes]. They are found in Liguria ;... and in Elis as one approaches Olympia by the mountain road; and they are used by those who work in metals. Outcrop coal was used in Britain during
2849-623: The South Westland World Heritage Area. Each of these parks have flora and fauna common to all areas, as well as species, like kiwi, particular to those areas. Four roads run into the West Coast Region. The main road running the length of the region is State Highway 6 . It connects to the Tasman District in the north through the Buller Gorge , and to Otago in the south via Haast Pass . Two roads connect to Canterbury to
2926-511: The Taramakau River in 1864 by two Māori, Ihaia Tainui and Haimona Taukau. By the end of the year there were an estimated 1800 prospectors, many of them around the Hokitika area, which in 1866 was briefly the most populous settlement in New Zealand. The region was divided between Nelson Province and Canterbury Province from 1853: in 1873 the Canterbury portion of the region formed its own province,
3003-588: The West Coast are colloquially known as "Coasters". The region reaches from Kahurangi Point in the north to Awarua Point in the south, a distance of 600 km. It has an area of 23,246 km . To the west is the Tasman Sea (which like the Southern Ocean can be very rough, with four-metre swells common), and to the east are the Southern Alps . Much of the land is rugged, with a coastal plain where much of
3080-415: The area was famous across New Zealand for its richness in pounamu greenstone. Kāi Tahu traded millions of modern New Zealand dollars ' worth of the stone across New Zealand , making Te Tai Poutini one of the wealthiest regions in the country. After the arrival of Europeans, the region became famed for its vast and mostly untapped gold reserves, which historically had not been highly valued. The region
3157-420: The census question. Of those at least 15 years old, 2,658 (9.5%) people had a bachelor's or higher degree, 15,825 (56.6%) had a post-high school certificate or diploma, and 8,490 (30.4%) people exclusively held high school qualifications. The median income was $ 32,700, compared with $ 41,500 nationally. 1,956 people (7.0%) earned over $ 100,000 compared to 12.1% nationally. The employment status of those at least 15
Ōrangipuku River - Misplaced Pages Continue
3234-424: The east, State Highway 7 through Lewis Pass to North Canterbury and State Highway 73 via Arthur's Pass to Christchurch . The Midland railway line is the only railway line into the region. It links to Christchurch via Arthur's Pass. The TranzAlpine train service runs return between Christchurch and Greymouth daily and freight lines extend to Ngākawau and Hokitika . Daily passenger flights operate into
3311-430: The evolution of the first trees . But bacteria and fungi did not immediately evolve the ability to decompose lignin, so the wood did not fully decay but became buried under sediment, eventually turning into coal. About 300 million years ago, mushrooms and other fungi developed this ability, ending the main coal-formation period of earth's history. Although some authors pointed at some evidence of lignin degradation during
3388-457: The factors involved in coalification, temperature is much more important than either pressure or time of burial. Subbituminous coal can form at temperatures as low as 35 to 80 °C (95 to 176 °F) while anthracite requires a temperature of at least 180 to 245 °C (356 to 473 °F). Although coal is known from most geologic periods , 90% of all coal beds were deposited in the Carboniferous and Permian periods. Paradoxically, this
3465-454: The flood risk exposure of the town. In the early 1900s, the Taramakau River overflowed into the Ōrangipuku River on several occasions, raising the risk of “breaking-through” to Lake Brunner. Investigations of river protection works began as early as 1907. In February 1946, floodwaters from the Taramakau again flowed into the Ōrangipuku River causing significant problems, and in October that year
3542-498: The form of iron pyrite (FeS 2 ). Being a dense mineral, it can be removed from coal by mechanical means, e.g. by froth flotation . Some sulfate occurs in coal, especially weathered samples. It is not volatilized and can be removed by washing. Minor components include: As minerals, Hg, As, and Se are not problematic to the environment, especially since they are only trace components. They become however mobile (volatile or water-soluble) when these minerals are combusted. Most coal
3619-475: The heat and pressure of deep burial caused the loss of water, methane and carbon dioxide and increased the proportion of carbon. The grade of coal produced depended on the maximum pressure and temperature reached, with lignite (also called "brown coal") produced under relatively mild conditions, and sub-bituminous coal , bituminous coal , or anthracite coal (also called "hard coal" or "black coal") produced in turn with increasing temperature and pressure. Of
3696-431: The increasing tendency of the anthracite to break with a conchoidal fracture , similar to the way thick glass breaks. As geological processes apply pressure to dead biotic material over time, under suitable conditions, its metamorphic grade or rank increases successively into: There are several international standards for coal. The classification of coal is generally based on the content of volatiles . However
3773-540: The location of the Southern Alps, which give rise to heavy orographic precipitation . The rain shadow effect is responsible for the relatively arid climate of the Canterbury Plains on the other side of the Southern Alps. The region is home to Ngāi Tahu , who value it for the greenstone (pounamu) found there in abundance. The region was only occasionally visited by Europeans until the discovery of gold near
3850-453: The morphology and some properties of the original plant. In many coals, individual macerals can be identified visually. Some macerals include: In coalification huminite is replaced by vitreous (shiny) vitrinite . Maturation of bituminous coal is characterized by bitumenization , in which part of the coal is converted to bitumen , a hydrocarbon-rich gel. Maturation to anthracite is characterized by debitumenization (from demethanation) and
3927-528: The most critical flood defences managed by the West Coast Regional Council , because of the widespread consequences if they failed. 42°39′S 171°26′E / 42.650°S 171.433°E / -42.650; 171.433 West Coast Region The West Coast ( Māori : Te Tai Poutini , lit. 'The Coast of Poutini, the Taniwha ') is a region of New Zealand on
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#17328510551484004-405: The most important distinction is between thermal coal (also known as steam coal), which is burnt to generate electricity via steam; and metallurgical coal (also known as coking coal), which is burnt at high temperature to make steel . Hilt's law is a geological observation that (within a small area) the deeper the coal is found, the higher its rank (or grade). It applies if the thermal gradient
4081-505: The most, followed by Russia . The word originally took the form col in Old English , from reconstructed Proto-Germanic * kula ( n ), from Proto-Indo-European root * g ( e ) u-lo- "live coal". Germanic cognates include the Old Frisian kole , Middle Dutch cole , Dutch kool , Old High German chol , German Kohle and Old Norse kol . Irish gual
4158-407: The nature of Carboniferous forests, which included lycophyte trees whose determinate growth meant that carbon was not tied up in heartwood of living trees for long periods. One theory suggested that about 360 million years ago, some plants evolved the ability to produce lignin , a complex polymer that made their cellulose stems much harder and more woody. The ability to produce lignin led to
4235-581: The next valuable mineral was coal. Discovered near the Buller River in the mid-1840s, mining began in earnest during the 1860s. By the 1880s coal had become the region's main industry, with mines throughout the northern half of the region, especially around Westport . Many of these continued in operation until the mid-20th century, and several survive. Timber has also long been a major industry, although in recent years there has been an uneasy balance between forestry for wood and forestry for conservation. Much of
4312-455: The number of double bonds between carbon). As carbonization proceeds, aliphatic compounds convert to aromatic compounds . Similarly, aromatic rings fuse into polyaromatic compounds (linked rings of carbon atoms). The structure increasingly resembles graphene , the structural element of graphite. Chemical changes are accompanied by physical changes, such as decrease in average pore size. The macerals are coalified plant parts that retain
4389-399: The population resides. It is divided into the three local government districts of (from north to south) Buller , Grey and Westland . The land is very scenic, with wild coastlines, mountains and a very high proportion of native bush , much of it native temperate rain forest . It is the only part of New Zealand where significant tracts of lowland forest remain: elsewhere, for instance on
4466-456: The pre-combustion treatment, turbine technology (e.g. supercritical steam generator ) and the age of the plant. A few integrated gasification combined cycle (IGCC) power plants have been built, which burn coal more efficiently. Instead of pulverizing the coal and burning it directly as fuel in the steam-generating boiler, the coal is gasified to create syngas , which is burned in a gas turbine to produce electricity (just like natural gas
4543-427: The reacting groups are attached. Dehydration and decarboxylation take place early in coalification, while demethanation begins only after the coal has already reached bituminous rank. The effect of decarboxylation is to reduce the percentage of oxygen, while demethanation reduces the percentage of hydrogen. Dehydration does both, and (together with demethanation) reduces the saturation of the carbon backbone (increasing
4620-510: The region is public land administered by the Department of Conservation and the region has some of the best remaining stands of native forest, along with a wealth of rare wildlife. Ecotourism is now an important industry, and this goes hand in hand with the conservation efforts. The West Coast region covers 23,245.52 km (8,975.15 sq mi) and has an estimated population of 34,800 as of June 2024, 0.7% of New Zealand's population. It
4697-463: The region. Air New Zealand flies between Christchurch and Hokitika and Sounds Air between Wellington and Westport. Coal Coal is a combustible black or brownish-black sedimentary rock , formed as rock strata called coal seams . Coal is mostly carbon with variable amounts of other elements , chiefly hydrogen , sulfur , oxygen , and nitrogen . Coal is a type of fossil fuel , formed when dead plant matter decays into peat which
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#17328510551484774-422: The strongest growing regional economies of New Zealand in 2022, though from a rather small base. Industries include mining for coal and alluvial gold , forestry and wood processing, fishing (including whitebaiting ), tourism and farming. Dairy farming has grown strongly – the local dairy co-operative Westland Milk Products remained independent when most others merged to form Fonterra in 2001. In
4851-399: The sulfur and most of the nitrogen is incorporated into the organic fraction in the form of organosulfur compounds and organonitrogen compounds . This sulfur and nitrogen are strongly bound within the hydrocarbon matrix. These elements are released as SO 2 and NO x upon combustion. They cannot be removed, economically at least, otherwise. Some coals contain inorganic sulfur, mainly in
4928-654: The upper section of the Ōrangipuku River into the Taramakau River. This proposal was only partially implemented to contain costs for ratepayers, with works including 900 metres (3,000 ft) of rock riprap, and strengthening and raising stopbanks where there was inadequate freeboard. In August 1959, a 3:1 subsidy was provided by the NZ Soil Conservation and River Control Council for a larger project involving placement of 17,300 tonnes of rock, 9,000 cubic metres of fill for stopbanks and 3,200 tonnes of rock for “topping-up”. The river protection works at Inchbonnie are some of
5005-465: The west coast of the South Island . It is administered by the West Coast Regional Council , and is known co-officially as Te Tai Poutini . It comprises the territorial authorities of Buller District , Grey District and Westland District . The principal towns are Westport , Greymouth and Hokitika . The region, one of the more remote areas of the country, is also the most sparsely populated. With
5082-415: The world's coal-generated electricity. Efforts around the world to reduce the use of coal have led some regions to switch to natural gas and renewable energy . In 2018 coal-fired power station capacity factor averaged 51%, that is they operated for about half their available operating hours. Coke is a solid carbonaceous residue that is used in manufacturing steel and other iron-containing products. Coke
5159-558: Was 48.1 years (compared with 38.1 years nationally). There were 5,448 people (16.3%) aged under 15 years, 4,518 (13.5%) aged 15 to 29, 15,861 (47.5%) aged 30 to 64, and 7,563 (22.7%) aged 65 or older. People could identify as more than one ethnicity. The results were 89.7% European ( Pākehā ); 13.5% Māori ; 1.6% Pasifika ; 4.0% Asian ; 0.5% Middle Eastern, Latin American and African New Zealanders (MELAA); and 4.3% other, which includes people giving their ethnicity as "New Zealander". English
5236-574: Was based on the trading of this commodity. Coal continues to arrive on beaches around the world from both natural erosion of exposed coal seams and windswept spills from cargo ships. Many homes in such areas gather this coal as a significant, and sometimes primary, source of home heating fuel. Coal consists mainly of a black mixture of diverse organic compounds and polymers. Of course, several kinds of coals exist, with variable dark colors and variable compositions. Young coals (brown coal, lignite) are not black. The two main black coals are bituminous, which
5313-504: Was carried to London by sea. In 1257–1259, coal from Newcastle upon Tyne was shipped to London for the smiths and lime -burners building Westminster Abbey . Seacoal Lane and Newcastle Lane, where coal was unloaded at wharves along the River Fleet , still exist. These easily accessible sources had largely become exhausted (or could not meet the growing demand) by the 13th century, when underground extraction by shaft mining or adits
5390-602: Was developed in the Soviet Union , or in an MHD topping cycle . However these are not widely used due to lack of profit. In 2017 38% of the world's electricity came from coal, the same percentage as 30 years previously. In 2018 global installed capacity was 2 TW (of which 1TW is in China) which was 30% of total electricity generation capacity. The most dependent major country is South Africa, with over 80% of its electricity generated by coal; but China alone generates more than half of
5467-408: Was developed. The alternative name was "pitcoal", because it came from mines. Cooking and home heating with coal (in addition to firewood or instead of it) has been done in various times and places throughout human history, especially in times and places where ground-surface coal was available and firewood was scarce, but a widespread reliance on coal for home hearths probably never existed until such
5544-490: Was during the Late Paleozoic icehouse , a time of global glaciation . However, the drop in global sea level accompanying the glaciation exposed continental shelves that had previously been submerged, and to these were added wide river deltas produced by increased erosion due to the drop in base level . These widespread areas of wetlands provided ideal conditions for coal formation. The rapid formation of coal ended with
5621-606: Was once known as "steam coal" as it was widely used as a fuel for steam locomotives . In this specialized use, it is sometimes known as "sea coal" in the United States. Small "steam coal", also called dry small steam nuts (DSSN), was used as a fuel for domestic water heating . Coal played an important role in industry in the 19th and 20th century. The predecessor of the European Union , the European Coal and Steel Community ,
5698-556: Was spoken by 98.0%, Māori language by 2.3%, Samoan by 0.2% and other languages by 5.6%. No language could be spoken by 1.5% (e.g. too young to talk). New Zealand Sign Language was known by 0.5%. The percentage of people born overseas was 13.2, compared with 28.8% nationally. Religious affiliations were 29.8% Christian , 0.6% Hindu , 0.2% Islam , 0.3% Māori religious beliefs , 0.4% Buddhist , 0.7% New Age , 0.1% Jewish , and 1.2% other religions. People who answered that they had no religion were 57.8%, and 9.0% of people did not answer
5775-467: Was subsequently settled by thousands of Irish Catholics after the Irish Famine , who constitute the majority of the population, alongside the indigenous Kāi Tahu and those who come from admixing between the two populations. The region was also heavily sought after by nuclear weapons states in the 1950s for its abundant resources of uranium , which many West Coasters found objectionable. The West Coast
5852-487: Was that 12,819 (45.9%) people were employed full-time, 4,101 (14.7%) were part-time, and 687 (2.5%) were unemployed. There are only four towns with a population over 1,000: Greymouth , Westport , Hokitika and Runanga . These four towns, plus Reefton (population 980), are recognised as urban areas by Statistics New Zealand. During the gold rush days, Hokitika had a population of more than 25,000 with more than 100 pubs . A recreation of an early New Zealand settlement
5929-430: Was used for electricity generation. Coal burnt in coal power stations to generate electricity is called thermal coal . It is usually pulverized and then burned in a furnace with a boiler . The furnace heat converts boiler water to steam , which is then used to spin turbines which turn generators and create electricity. The thermodynamic efficiency of this process varies between about 25% and 50% depending on
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