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Somerset Coalfield
The Somerset Coalfield in northern Somerset, England is an area where coal was mined from the 15th century until 1973. It is part of a larger coalfield which stretched into southern Gloucestershire. The Somerset coalfield stretched from Cromhall in the north to the Mendip Hills in the south, and from Bath in the east to Nailsea in the west, a total area of about . Most of the pits on the coalfield were concentrated in the Cam Brook, Wellow Brook and Nettlebridge Valleys and around Radstock and Farrington Gurney. The pits were grouped geographically, with clusters of pits close together working the same coal seams often under the same ownership. Many pits shared the trackways and tramways which connected them to the Somerset Coal Canal or railways for distribution. The early pits were adits where coal outcropped or bell pits where coal was close to the surface. These methods were abandoned when deep seams were mined. The deepest shaft on the coalfield was at the Strap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adits
An adit (from Latin ''aditus'', entrance) or stulm is a horizontal or nearly horizontal passage to an underground mine. Miners can use adits for access, drainage, ventilation, and extracting minerals at the lowest convenient level. Adits are also used to explore for mineral veins. Although most strongly associated with mining, the term ''adit'' is sometimes also used in the context of underground excavation for non-mining purposes; for example, to refer to smaller underground passageways excavated for underground metro systems, to provide pedestrian access to stations (pedestrian adits), and for access required during construction (construction adits). Construction Adits are driven into the side of a hill or mountain, and are often used when an ore body is located inside the mountain but above the adjacent valley floor or coastal plain. In cases where the mineral vein outcrops at the surface, the adit may follow the lode or vein until it is worked out, in which case the adit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mudstone
Mudstone, a type of mudrock, is a fine-grained sedimentary rock whose original constituents were clays or muds. Mudstone is distinguished from ''shale'' by its lack of fissility.Blatt, H., and R.J. Tracy, 1996, ''Petrology.'' New York, New York, W. H. Freeman, 2nd ed, 529 pp. The term ''mudstone'' is also used to describe carbonate rocks (limestone or dolomite) that are composed predominantly of carbonate mud. However, in most contexts, the term refers to siliciclastic mudstone, composed mostly of silicate minerals. The NASA Curiosity rover has found deposits of mudstone on Mars that contain organic substances such as propane, benzene and toluene. Definition There is not a single definition of mudstone that has gained general acceptance,Boggs 2006, p.143 though there is wide agreement that mudstones are fine-grained sedimentary rocks, composed mostly of silicate grains with a grain size less than . Individual grains this size are too small to be distinguished without a micros ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sandstone
Sandstone is a Clastic rock#Sedimentary clastic rocks, clastic sedimentary rock composed mainly of grain size, sand-sized (0.0625 to 2 mm) silicate mineral, silicate grains, Cementation (geology), cemented together by another mineral. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar, because they are the most resistant minerals to the weathering processes at the Earth's surface. Like uncemented sand, sandstone may be imparted any color by impurities within the minerals, but the most common colors are tan, brown, yellow, red, grey, pink, white, and black. Because sandstone beds can form highly visible cliffs and other topography, topographic features, certain colors of sandstone have become strongly identified with certain regions, such as the red rock deserts of Arches National Park and other areas of the Southwestern United States, American Southwest. Rock formations composed of sandstone usually allow the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Variscan Orogeny
The Variscan orogeny, or Hercynian orogeny, was a geologic mountain-building event caused by Late Paleozoic continental collision between Euramerica (Laurussia) and Gondwana to form the supercontinent of Pangaea. Nomenclature The name ''Variscan'' comes from the Medieval Latin name for the district '' Variscia'', the home of a Germanic tribe, the Varisci; Eduard Suess, professor of geology at the University of Vienna, coined the term in 1880. ( Variscite, a rare green mineral first discovered in the Vogtland district of Saxony in Germany, which is in the Variscan belt, has the same etymology.) ''Hercynian'', on the other hand, derives from the Hercynian Forest. Both words were descriptive terms of strike directions observed by geologists in the field, ''variscan'' for southwest to northeast, ''hercynian'' for northwest to southeast. The ''variscan'' direction reflected the direction of ancient fold belts cropping out throughout Germany and adjacent countries and the meanin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Newton St Loe
Newton St Loe is a small Somerset village and civil parish located close to the villages of Corston and Stanton Prior, between Bath and Bristol in England. The majority of the village is owned by the Duchy of Cornwall. The parish has a population of 681. History The Saxon manor of Newton, held by Aluric in the time of King Edward the Confessor, was given to the bishop of Coutances by William the Conqueror. At the time of Domesday the bishop was Geoffrey de Montbray also known from his see as Geoffrey of Coutances, a Norman nobleman, trusted adviser of William and a great secular prelate, warrior and administrator. Newton St Loe takes its additional name from the family of St. Lo, who drew their name from Saint-Lô in Normandy; the family, Latinized in documents as "de Sancto Laudo", held the manor in the time of Richard I. Ultimately, the town's name references the 6th-century bishop Saint Laud of Coutances. There is evidence of a 3rd-century Roman villa on a site between ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Smith
William, Willie, Will, Bill, or Billy Smith may refer to: Academics * William Smith (Master of Clare College, Cambridge) (1556–1615), English academic * William Smith (antiquary) (c. 1653–1735), English antiquary and historian of University College, Oxford * William Smith (scholar) (1711–1787), English classical scholar and Anglican Dean of Chester * William Smith (Episcopal priest) (1727–1803), Scottish-born first provost of University of Pennsylvania * William Pitt Smith (1760–1796), American physician, educator and theological writer * William Andrew Smith (1802–1870), American college president and clergyman * William Smith (lexicographer) (1813–1893), English editor and publisher of dictionaries * William Robertson Smith (1846–1894), Scottish philologist, physicist, archaeologist and Biblical critic * William Benjamin Smith (1850–1934), American professor of mathematics at Tulane University * William Ramsay Smith (1859–1937), Australian anthropologist * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fault (geology)
In geology, a fault is a Fracture (geology), planar fracture or discontinuity in a volume of Rock (geology), rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust (geology), crust result from the action of Plate tectonics, plate tectonic forces, with the largest forming the boundaries between the plates, such as the megathrust faults of subduction, subduction zones or transform faults. Energy release associated with rapid movement on active faults is the cause of most earthquakes. Faults may also displace slowly, by aseismic creep. A ''fault plane'' is the Plane (geometry), plane that represents the fracture surface of a fault. A ''fault trace'' or ''fault line'' is a place where the fault can be seen or mapped on the surface. A fault trace is also the line commonly plotted on geological maps to represent a fault. A ''fault zone'' is a cluster of parallel faults. However, the term is also used for the zone ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thrust Fault
A thrust fault is a break in the Earth's crust, across which older rocks are pushed above younger rocks. Thrust geometry and nomenclature Reverse faults A thrust fault is a type of reverse fault that has a dip of 45 degrees or less. If the angle of the fault plane is lower (often less than 15 degrees from the horizontal) and the displacement of the overlying block is large (often in the kilometer range) the fault is called an ''overthrust'' or ''overthrust fault''. Erosion can remove part of the overlying block, creating a ''fenster'' (or ''window'') – when the underlying block is exposed only in a relatively small area. When erosion removes most of the overlying block, leaving island-like remnants resting on the lower block, the remnants are called ''klippen'' (singular '' klippe''). Blind thrust faults If the fault plane terminates before it reaches the Earth's surface, it is called a ''blind thrust'' fault. Because of the lack of surface evidence, blind thrust fa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Farmborough Fault Belt
Farmborough is a village and civil parish, south west of Bath in Somerset, England. It straddles both the A39 and A368 roads. The parish has a population of 1,035. History The Farmborough Hoard of Iron Age coins was found in the village in 1984 and is now in the British Museum. The parish of Farmborough was part of the Keynsham Hundred, The village has historically been connected with the coal mines of the Somerset coalfield, but these are all now closed. Farmborough Church of England VC Primary School was built in 1857, and now has 90 pupils between the ages of 4 and 11 years. The school intake figures have shown a gradual decline in attendance in recent years. In 2007 the local community pre-school playgroup moved into an unused classroom at the school site and a breakfast club was established to assist working parents to leave their children in a safe environment prior to school opening hours. Author Dick King-Smith once taught at the school. Governance Farmboro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pensford
Pensford is the largest village in the civil parish of Publow in Somerset, England. It lies in the Chew Valley, approximately south of Bristol, west of Bath, and north of Wells. It is on the A37 road from Bristol to Shepton Mallet. Pensford was identified as being of special architectural and historic interest and was designated as a Conservation Area in May 1988. History The name Pensford is in all likelihood derived from Brythonic ''Penffordd'', meaning roughly 'top of the road' or 'the highest or furthest point of the road'. Alternatively, it may mean 'The animal pens by the ford' from the Old English ''pens'' and ''ford''. The parish of Pensford was part of the Keynsham Hundred, During the 14th to 16th centuries Pensford was a cloth centre based on local wool. On 24 June 1685 rebel forces camped at Pensford during the Monmouth Rebellion. Coal mining During the 19th and 20th centuries, the main industry was coal mining, with Pensford and the surrounding area f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
