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Slate Industry
The slate industry is the industry related to the extraction and processing of slate. Slate is either quarried from a ''slate quarry'' or reached by tunneling in a ''slate mine''. Common uses for slate include as a roofing material, a flooring material, gravestones and memorial tablets, and electrical insulation. Slate mines are found around the world. 90% of Europe's natural slate used for roofing originates from the Slate Industry in Spain.European Association of Mining Industries website retrieved on 26/01/2010 The major slate mining region in the United Kingdom is the Lake district, with Honister slate mine being the last working slate mine, the only producers of the world famous Westmorland greenslate. In the remainder of Continental Europe and the |
Industry (economics)
In microeconomics, an industry is a branch of an economy that Production (economics) , produces a closely related set of raw materials, Good (economics) , goods, or Service (economics) , services. For example, one might refer to the wood industry or to the insurance industry. When evaluating a single group or company, its dominant source of revenue is typically used by industry classifications to classify it within a specific industry. For example the International Standard Industrial Classification (ISIC) – used directly or through derived classifications for the official statistics of most countries worldwide – classifies "statistical units" by the "economic activity in which they mainly engage". Industry is then defined as "set of statistical units that are classified into the same ISIC category". However, a single business need not belong just to one industry, such as when a large business (often referred to as a conglomerate (company), conglomerate) Diversification (ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galicia (Spain)
Galicia ( ; or ; ) is an Autonomous communities of Spain, autonomous community of Spain and nationalities and regions of Spain, historic nationality under Spanish law. Located in the northwest Iberian Peninsula, it includes the provinces of Spain, provinces of La Coruña (province), A Coruña, Lugo (province), Lugo, Ourense (province), Ourense, and Pontevedra (province), Pontevedra. Galicia is located in Atlantic Europe. It is bordered by Portugal to the south, the Spanish autonomous communities of Castile and León and Asturias to the east, the Atlantic Ocean to the west, and the Cantabrian Sea to the north. It had a population of 2,705,833 in 2024 and a total area of . Galicia has over of coastline, including its offshore islands and islets, among them Cíes Islands, Ons Island, Ons, Sálvora, Cortegada Island, which together form the Atlantic Islands of Galicia National Park, and the largest and most populated, A Illa de Arousa. The area now called Galicia was first in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Segontium
Segontium () is a Roman fort on the outskirts of Caernarfon in Gwynedd, North Wales. Etymology The fort probably takes its name either directly from the Afon Seiont or from a pre-existing British settlement itself named for the river. The name is a Latinised form of the Brythonic language *seg-ontio, which may be translated as "strong place". There is no evidence that the fort is connected to the Segontiaci, a British tribe noted by Julius Caesar. History Roman Segontium was founded by Agricola in AD 77 or 78 after he had conquered the Ordovices in North Wales. It was the main Roman fort in the north of Roman Wales and was designed to hold about a thousand auxiliary infantry. It was connected by a Roman road to the Roman legionary base at Chester, Deva Victrix. Unlike the medieval Caernarfon Castle that was built alongside the Seiont estuary more than a thousand years later, Segontium was situated on higher ground to the east giving a good view of the Menai Straits. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frost
Frost is a thin layer of ice on a solid surface, which forms from water vapor that deposits onto a freezing surface. Frost forms when the air contains more water vapor than it can normally hold at a specific temperature. The process is similar to the formation of dew, except it occurs below the freezing point of water typically without crossing through a liquid state. Air always contains a certain amount of water vapor, depending on temperature. Warmer air can hold more than colder air. When the atmosphere contains more water than it can hold at a specific temperature, its relative humidity rises above 100% becoming supersaturated, and the excess water vapor is forced to deposit onto any nearby surface, forming seed crystals. The temperature at which frost will form is called the dew point, and depends on the humidity of the air. When the temperature of the air drops below its dew point, excess water vapor is forced out of solution, resulting in a phase change directly fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roofing Material
Domestic roof construction is the framing (construction), framing and roof covering which is found on most detached houses in cold and temperate climates. Such roofs are built with mostly timber, take a number of different List of roof shapes, shapes, and are covered with a variety of List of commercially available roofing material, materials. Overview Modern timber roofs are mostly framed with pairs of common rafters or prefabricated wooden trusses fastened together with truss connector plates. Timber framed and historic buildings may be framed with principal rafters or timber roof trusses. Roofs are also designated as ''warm'' or ''cold roof'' depending on the way they are designed and built with regard to thermal building insulation and Ventilation (architecture), ventilation. The steepness or roof pitch of a sloped roof is determined primarily by the roof covering material and aesthetic design. Flat roofs actually slope up to approximately ten degrees to shed water. Flat r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanism
Volcanism, vulcanism, volcanicity, or volcanic activity is the phenomenon where solids, liquids, gases, and their mixtures erupt to the surface of a solid-surface astronomical body such as a planet or a moon. It is caused by the presence of a heat source, usually internally generated, inside the body; the heat is generated by various processes, such as radioactive decay or tidal heating. This heat partially melts solid material in the body or turns material into gas. The mobilized material rises through the body's interior and may break through the solid surface. Causes For volcanism to occur, the temperature of the mantle must have risen to about half its melting point. At this point, the mantle's viscosity will have dropped to about 1021 Pascal-seconds. When large scale melting occurs, the viscosity rapidly falls to 103 Pascal-seconds or even less, increasing the heat transport rate a million-fold. The occurrence of volcanism is partially due to the fact that melted materi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sedimentation
Sedimentation is the deposition of sediments. It takes place when particles in suspension settle out of the fluid in which they are entrained and come to rest against a barrier. This is due to their motion through the fluid in response to the forces acting on them: these forces can be due to gravity, centrifugal acceleration, or electromagnetism. Settling is the falling of suspended particles through the liquid, whereas sedimentation is the final result of the settling process. In geology, sedimentation is the deposition of sediments which results in the formation of sedimentary rock. The term is broadly applied to the entire range of processes that result in the formation of sedimentary rock, from initial erosion through sediment transport and settling to the lithification of the sediments. However, the strict geological definition of sedimentation is the mechanical deposition of sediment particles from an initial suspension in air or water. Sedimentation may pertain to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tectonic
Tectonics ( via Latin ) are the processes that result in the structure and properties of the Earth's crust and its evolution through time. The field of ''planetary tectonics'' extends the concept to other planets and moons. These processes include those of mountain-building, the growth and behavior of the strong, old cores of continents known as cratons, and the ways in which the relatively rigid plates that constitute the Earth's outer shell interact with each other. Principles of tectonics also provide a framework for understanding the earthquake and volcanic belts that directly affect much of the global population. Tectonic studies are important as guides for economic geologists searching for fossil fuels and ore deposits of metallic and nonmetallic resources. An understanding of tectonic principles can help geomorphologists to explain erosion patterns and other Earth-surface features. Main types of tectonic regime Extensional tectonics Extensional tectonic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palaeozoic
The Paleozoic ( , , ; or Palaeozoic) Era is the first of three geological eras of the Phanerozoic Eon. Beginning 538.8 million years ago (Ma), it succeeds the Neoproterozoic (the last era of the Proterozoic Eon) and ends 251.9 Ma at the start of the Mesozoic Era. The Paleozoic is subdivided into six geologic periods (from oldest to youngest), Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian. Some geological timescales divide the Paleozoic informally into early and late sub-eras: the Early Paleozoic consisting of the Cambrian, Ordovician and Silurian; the Late Paleozoic consisting of the Devonian, Carboniferous and Permian. The name ''Paleozoic'' was first used by Adam Sedgwick (1785–1873) in 1838 to describe the Cambrian and Ordovician periods. It was redefined by John Phillips (1800–1874) in 1840 to cover the Cambrian to Permian periods. It is derived from the Greek ''palaiós'' (παλαιός, "old") and ''zōḗ'' (ζωή, "life") meaning "ancient l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mondoñedo
Mondoñedo () is a small town and municipality in the Galician province of Lugo, Spain. , the town has a population of 4,508. Mondoñedo occupies a sheltered valley among the northern outliers of the Cantabrian Mountains. Despite being the core of the region of A Mariña Central, it is the city with the fifth biggest population after Viveiro, Ribadeo, Foz and Burela. The municipality of Mondoñedo is in the northern half of the province of Lugo and is bordered on the north by the municipalities of Foz and Alfoz, to the south by Pastoriza and Riotorto, to the east by Lorenzana and to west with Abadín. The population of Mondoñedo is distributed throughout the 15 parishes that make up the council. History Mondoñedo is first mentioned during the rule of king Ordoño I of Asturias in 858; It was taken by surprise by the French in 1809 during the Napoleonic Wars. The Galician Province of Mondoñedo disappeared in 1833 when all the seven provinces of Galicia were reduced t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ortigueira
Ortigueira is a seaport and municipality in the province of A Coruña the autonomous community of Galicia in northwestern Spain. It belongs to the comarca of Ortegal. It is located on the northern slope of the Serra da Faladoira, the river Mera and on the eastern shore of the Ria de Santa Marta—a winding, rock-bound and much indented inlet of the Bay of Biscay, between Capes Ortegal and Bares, the northernmost headlands of the Peninsula. The town is noted for its romantic surroundings and sea bathing opportunities. Port of Espasante (Ortigueira) The industries are fishing and farming. The harbour is well sheltered. Owing to its shallowness, large vessels cannot enter, but there is an important coasting trade, despite the dangerous character of the coast and the prevalence of fogs and gales. Culture Ortigueira is notable for hosting Ortigueira's Festival of Celtic World, a folk music festival dedicated to the Celtic nations. See also List of municipalities in A Coruña ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
