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Lake Harrison
Lake Harrison or Lake Bosworth is the name given to a lake that in parts of the Ice Age may have covered much of the Midlands in England around Warwick, Birmingham and Leicester. It is suggested that it was formed when ice sheets over Wales and Northern England blocked drainage north-eastwards, trapping a lake between this and the Cotswolds. Finally the lake made two overflow courses, until drainage by the Cole and Soar could resume due to glacial retreat: *South-east. Across the Fenny Compton Gap into the Cherwell which drains into the Thames. This has become a wind gap. *South-west. This course became lasting for the south-west zone of where the lake was, as the River Avon, Warwickshire which flows into the Severn. See also stream capture. The extent of this proposed lake has been disputed, and it is now thought that several smaller proglacial lakes may explain the glacial deposits in the area. History The existence of such a lake was originally proposed by W. Jerome Harris ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Avon, Warwickshire
The River Avon () in central England flows generally southwestwards and is a major left-bank tributary of the River Severn, of which it is the easternmost. It is also known as the Warwickshire Avon or Shakespeare's Avon, to distinguish it from several other rivers of the same name in the United Kingdom. Beginning in Northamptonshire, the river flows through or adjoining the counties of Leicestershire, Northamptonshire, Warwickshire, Worcestershire and Gloucestershire, near the Cotswold Hills area. Notable towns it flows through include Rugby, Warwick, Stratford-upon-Avon, Evesham, Pershore and Tewkesbury, where it joins the Severn. It has traditionally been divided since 1719 into the Lower Avon, below Evesham, and the Upper Avon, from Evesham to above Stratford-upon-Avon. Improvements to aid navigation began in 1635, and a series of locks and weirs made it possible to reach Stratford, and to within of Warwick. The Upper Avon was tortuous and prone to flooding, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wolstonian Stage
The Wolstonian Stage is a middle Pleistocene stage of the geological history of Earth from approximately 374,000 until 130,000 years ago. It precedes the Eemian Stage in Europe and follows the Hoxnian Stage in the British Isles. It is also approximately analogous to the Warthe and Saalian stages in northern Europe; the Riss glaciation in the Alps; and the Illinoian Stage in North America. It is equivalent to Marine isotope stages (MIS) 10 through 6. MIS 10, 8 and 6 were glacial periods and 9 and 7 were interglacials. It is named after Wolston in the English county of Warwickshire. Description The Wolstonian Stage is a middle Pleistocene stage of the geological history of Earth that precedes the Ipswichian Stage ( Eemian Stage in Europe) and follows the Hoxnian Stage in the British Isles. The Wolstonian Stage apparently includes three periods of glaciation. The Wolstonian Stage is temporally analogous to the Warthe Stage and Saalian Stage in northern Europe and th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diachronous
In geology, a diachronism (Greek ''dia'', "through" + ''chronos'', "time" + ''-ism''), or diachronous deposit, is a sedimentary rock formation in which the material, although of a similar nature, varies in age with the place where it was deposited.Whitten F.G.A & Brooks J.R.V., (1972),''A Dictionary of Geology'', Penguin, Typically this occurs as a result of a marine transgression or regression, or the progressive development of a delta. As the shoreline advances or retreats, a succession of continuous deposits representing different environments (for example beach, shallow water, deeper water) may be left behind. Although each type of deposit (facies) may be continuous over a wide area, its age varies according to the position of the shoreline through time. An example is the sandy beds near the end of the lower Carboniferous of the west of England (the ''Drybrook sandstone'' of the Forest of Dean). Deposition of this began much later in the Bristol area than further north. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Geological Survey
The British Geological Survey (BGS) is a partly publicly funded body which aims to advance geoscientific knowledge of the United Kingdom landmass and its continental shelf by means of systematic surveying, monitoring and research. The BGS headquarters are in Keyworth, Nottinghamshire, England. Its other centres are located in Edinburgh, Wallingford, Cardiff and London. The current motto of the BGS is: ''Gateway to the Earth''. History and previous names The Geological Survey was founded in 1835 by the Board of Ordnance as the Ordnance Geological Survey, under Henry De la Beche. This was the world's first national geological survey. It remained a branch of the Ordnance Survey for many years. In 1965, it was merged with the Geological Museum and Overseas Geological Surveys, under the name of Institute of Geological Sciences. On 1 January 1984, the institute was renamed the British Geological Survey (and often referred to as the BGS), a name still carried today. Competenc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Lapworth
Lake Lapworth was a postulated glacial lake in Great Britain, believed to have formed during the last ice age when glaciers ended the northern outlet of the Severn. This ran through the Dee (which passes by Chester). At some point or points it ran into glaciers and backed up to form a resultant lake. This overflowed southwards cutting the Ironbridge Gorge, near Telford in Shropshire. This permanently diverted most of the Severn drainage basin to its current basin which flows south. Etymology The lake was named in 1924 by Leonard Johnston Wills for the late Charles Lapworth ( 1920), who suggested its existence in 1898. Frederic William Harmer (1835-1923) proposed the same causation and timing in 1907 having considered glacial lake sediments found on the Shropshire Plain. Geography and geology Lake Lapworth is one of several glacial lakes that are thought to have existed during the Ice Age in the late Pleistocene. This was the geological epoch that lasted from about 2,580,000 to 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Agassiz
Lake Agassiz was a large glacial lake in central North America. Fed by glacial meltwater at the end of the last glacial period, its area was larger than all of the modern Great Lakes combined. First postulated in 1823 by William H. Keating, it was named by Warren Upham in 1879 after Louis Agassiz, when Upham recognized that the lake was formed by glacial action. Geological progression During the last ice age, northern North America was covered by an ice sheet, which alternately advanced and retreated with variations in the climate. This continental ice sheet formed during the period now known as the Wisconsin glaciation, and covered much of central North America between 30,000 and 10,000 years ago. As the ice sheet disintegrated, its meltwaters created an immense proglacial lake. Around 13,000 years ago, this lake came to cover much of what are now southeastern Manitoba, northwestern Ontario, northern Minnesota, eastern North Dakota, and Saskatchewan. At its greatest ex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frederick William Shotton
Professor Frederick William Shotton FRS (1906–1990) was a British geologist. He was awarded the Prestwich Medal in 1954. Shotton's research into the geological makeup of Normandy beaches helped allied commanders decide which were the best to use on D-Day. From May 1941 to September 1943, based in Egypt, he used hydrogeology to guide development of potable water supplies for British forces operational in the Middle East and northern Africa. From October 1943 he helped plan for the Allied liberation of Normandy by providing terrain evaluation (primarily through preparation of specialist maps and contribution of technical advice) relating to beach conditions, suitability of ground for the rapid construction of temporary airfields, and water supply. Following D-Day, 6 June 1944, he was based in northern France and later Belgium, and was involved with further water supply tasks, discussions on quarrying of aggregate, and assessment of soil conditions likely to influence off-road vehic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bosworth Field
The Battle of Bosworth or Bosworth Field was the last significant battle of the Wars of the Roses, the civil war between the houses of Lancaster and York that extended across England in the latter half of the 15th century. Fought on 22 August 1485, the battle was won by an alliance of Lancastrians and disaffected Yorkists. Their leader Henry Tudor, Earl of Richmond, became the first English monarch of the Tudor dynasty by his victory and subsequent marriage to a Yorkist princess. His opponent Richard III, the last king of the House of York, was killed during the battle, the last English monarch to die in combat. Historians consider Bosworth Field to mark the end of the Plantagenet dynasty, making it one of the defining moments of English history. Richard's reign began in 1483 when he seized the throne from his twelve-year-old nephew Edward V. The boy and his younger brother Richard soon disappeared, to the consternation of many, and Richard's support was further eroded by un ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glacier
A glacier (; ) is a persistent body of dense ice that is constantly moving under its own weight. A glacier forms where the accumulation of snow exceeds its ablation over many years, often centuries. It acquires distinguishing features, such as crevasses and seracs, as it slowly flows and deforms under stresses induced by its weight. As it moves, it abrades rock and debris from its substrate to create landforms such as cirques, moraines, or fjords. Although a glacier may flow into a body of water, it forms only on land and is distinct from the much thinner sea ice and lake ice that form on the surface of bodies of water. On Earth, 99% of glacial ice is contained within vast ice sheets (also known as "continental glaciers") in the polar regions, but glaciers may be found in mountain ranges on every continent other than the Australian mainland, including Oceania's high-latitude oceanic island countries such as New Zealand. Between latitudes 35°N and 35°S, glaciers occur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Jerome Harrison
William Jerome Harrison FGS (16 March 1845 – 6 June 1908), was a British geologist, science writer, and amateur photographer who wrote several textbooks on chemistry, physics, photography, and geology, including the first geological book illustrated with photographs. Born in Hemsworth, Yorkshire, he was educated at Westminster Training College, and afterwards for two years at Cheltenham College. For many years he was curator of the Leicester Town Museum. In 1880 he moved to Birmingham, where he was appointed Chief Science Master under the Birmingham School Board. His books include ''A History of Photography'', ''The Chemistry of Photography'', and ''Geology of the Counties of England and of North and South Wales''. Harrison is also credited with being the founder of the National Photographic Record and Survey Movement which led to the formation of the National Photographic Record Association The National Photographic Record Association was established in 1897 to create a re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proglacial Lake
In geology, a proglacial lake is a lake formed either by the damming action of a moraine during the retreat of a melting glacier, a glacial ice dam, or by meltwater trapped against an ice sheet due to isostatic depression of the crust around the ice. At the end of the last ice age about 10,000 years ago, large proglacial lakes were a widespread feature in the northern hemisphere. Moraine-dammed The receding glaciers of the tropical Andes have formed a number of proglacial lakes, especially in the Cordillera Blanca of Peru, where 70% of all tropical glaciers are. Several such lakes have formed rapidly during the 20th century. These lakes may burst, creating a hazard for zones below. Many natural dams (usually moraines) containing the lake water have been reinforced with safety dams. Some 34 such dams have been built in the Cordillera Blanca to contain proglacial lakes. Several proglacial lakes have also formed in recent decades at the end of glaciers on the eastern side of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
