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Irwell Valley
The Irwell Valley in North West England extends from the Forest of Rossendale through the cities of Salford and Manchester. The River Irwell runs through the valley, along with the River Croal. Geology Shallow seas covered most of south-east Lancashire in the Upper Carboniferous period when deposits of mud and sand were laid down. These later became beds of shales and sandstones alternating with layers of gritstone. There are also beds of New Red Sandstone and Manchester Marls. The glaciers of the Pleistocene epoch further shaped the landscape and then retreated, leaving behind deposits of sand, pebbles and boulder clay that formed the fluvioglacial ridges of the Irwell Valley. Ashclough, a 5.8 hectare (14.3 acre) site which comprises the steep banks of the river between Prestolee and Little Lever, has been designated a Site of Special Scientific Interest (SSSI) because of its geological interest, primarily because it is the best site in the area displaying Ashcough Marine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North West England
North West England is one of nine official regions of England and consists of the ceremonial counties of England, ceremonial counties of Cheshire, Cumbria, Greater Manchester, Lancashire and Merseyside. The North West had a population of 7,417,397 in 2021. It is the Countries of the United Kingdom by population, third-most-populated region in the United Kingdom, after the South East England, South East and Greater London. The largest settlements are Manchester and Liverpool. It is one of the three regions, alongside North East England and Yorkshire and the Humber, that make up Northern England. Subdivisions The official Regions of England, region consists of the following Subdivisions of England, subdivisions: The region has the following sub-divisions: After abolition of the Greater Manchester and Merseyside County Councils in 1986, power was transferred to the metropolitan boroughs, making them equivalent to unitary authorities. In April 2011, Greater Manchester gained ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boulder Clay
Boulder clay is an unsorted agglomeration of clastic sediment that is unstratified and structureless and contains gravel of various sizes, shapes, and compositions distributed at random in a fine-grained matrix. The fine-grained matrix consists of stiff, hard, pulverized clay or rock flour. Boulder clay is also known as drift clay; till; and unstratified drift.Charlesworth, J. K., 1957. ''Chap 18, Boulder Clay''. In ''The Quaternary Era, with Special Reference to its Glaciation''. v. 1, London, United Kingdom, Edward Arnold, p. 376-388.Neuendorf, K.K.E., J.P. Mehl, Jr., and J.A. Jackson, eds. (2005) ''Glossary of Geology'' (5th ed.). Alexandria, Virginia, American Geological Institute. 779 pp. The term ''boulder clay'' is infrequently used for gravelly sedimentary deposits of nonglacial origin. These deposits include submarine slump and slide deposits along continental margins,Reineck, H.E. and Singh, I.B., 1982. ''Depositional sedimentary environments: with reference to terrige ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nob End
Nob End is the site of a former waste tip which is now a Site of Special Scientific Interest and Local Nature Reserve near Little Lever and Kearsley, in Greater Manchester, England. History Standing at the confluence of the River Irwell and River Croal the site was used around 1850-70 as a tip for toxic alkaline waste from the production of sodium carbonate (soda ash) by the Leblanc process. The waste, known as ' galligu', was a blue sludge (from reduced iron compounds) dominated by calcium sulphide and smelling of bad eggs. The surface of the waste has since weathered down to calcium carbonate, and calcicolous vegetation has colonised the site. As natural limestone grassland does not occur in Greater Manchester, many of the species found are rare in the county. The 8.8 hectare (21.7 acres)site became a SSSI in 1988, and a Local Nature Reserve in 2000. In 1936 a major breach in the now defunct Manchester Bolton & Bury Canal occurred east of the Nob End locks; it has never ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leblanc Process
The Leblanc process was an early industrial process for making ''soda ash'' ( sodium carbonate) used throughout the 19th century, named after its inventor, Nicolas Leblanc. It involved two stages: making sodium sulfate from sodium chloride, followed by reacting the sodium sulfate with coal and calcium carbonate to make sodium carbonate. The process gradually became obsolete after the development of the Solvay process. Background Soda ash ( sodium carbonate) and potash ( potassium carbonate), collectively termed ''alkali'', are vital chemicals in the glass, textile, soap, and paper industries. The traditional source of alkali in western Europe had been potash obtained from wood ashes. However, by the 13th century, deforestation had rendered this means of production uneconomical, and alkali had to be imported. Potash was imported from North America, Scandinavia, and Russia, where large forests still stood. Soda ash was imported from Spain and the Canary Islands, where it w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sewage Treatment
Sewage treatment is a type of wastewater treatment which aims to remove contaminants from sewage to produce an effluent that is suitable to discharge to the surrounding environment or an intended reuse application, thereby preventing water pollution from raw sewage discharges. Sewage contains wastewater from households and businesses and possibly pre-treated Industrial wastewater treatment, industrial wastewater. There are a large number of sewage treatment processes to choose from. These can range from Decentralized wastewater system, decentralized systems (including on-site treatment systems) to large centralized systems involving a network of pipes and pump stations (called sewerage) which convey the sewage to a treatment plant. For cities that have a combined sewer, the sewers will also carry urban runoff (stormwater) to the sewage treatment plant. Sewage treatment often involves two main stages, called primary and secondary treatment, while advanced treatment also incorpo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manchester Bolton & Bury Canal
The Manchester Bolton & Bury Canal is a disused canal in Greater Manchester, England, built to link Bolton and Bury, Greater Manchester, Bury with Manchester. The canal, when fully opened, was long. It was accessed via a junction with the River Irwell in Salford, Greater Manchester, Salford. Seventeen lock (water transport), locks were required to climb to the Route summit, summit as it passed through Pendleton, Greater Manchester, Pendleton, heading northwest to Prestolee before it split northwest to Bolton and northeast to Bury. Between Bolton and Bury the canal was level and required no locks. Six Navigable aqueduct, aqueducts were built to allow the canal to cross the rivers Irwell and River Tonge, Tonge and several minor roads. The canal was commissioned in 1791 by local landowners and businessmen and built between 1791 and 1808, during the history of the British canal system#The Golden Age, Golden Age of canal building, at a cost of pound sterling, £127,700 (£ today). ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
