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Cadair Fawr
Cadair Fawr is a hill in the northern corner of the county borough of Rhondda Cynon Taf, Wales. It lies within the Brecon Beacons National Park and Fforest Fawr Geopark. The 485m high summit at OS grid ref SN 978123 is marked by a trig point. Cadair Fawr is the highest point of a broad ridge known as Cefn Cadlan which forms the northern edge of Cwm Cadlan, a valley which itself runs east-northeastwards from the village of Penderyn. The name Cadair Fawr signifies the 'big chair' whilst Cefn Cadlan signifies the 'ridge of the battlefield'. Geology The summit is formed from Carboniferous Limestone whilst much of the Cefn Cadlan ridge which slopes away to the west is formed from the Twrch Sandstone (formerly known as the Basal Grit), which also dates from the Carboniferous period. A series of minor faults runs northwest to southeast through the hill whilst a few including the Coed Hir Fault run northeast to southwest, paralleling the major fault forming a part of the Neath ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
County Borough
County borough is a term introduced in 1889 in the United Kingdom of Great Britain and Ireland, to refer to a borough or a city independent of county council control, similar to the unitary authorities created since the 1990s. An equivalent term used in Scotland was a county of city. They were abolished by the Local Government Act 1972 in England and Wales, but continue in use for lieutenancy and shrievalty in Northern Ireland. In the Republic of Ireland they remain in existence but have been renamed ''cities'' under the provisions of the Local Government Act 2001. The Local Government (Wales) Act 1994 re-introduced the term for certain "principal areas" in Wales. Scotland did not have county boroughs but instead had counties of cities. These were abolished on 16 May 1975. All four Scottish cities of the time—Aberdeen, Dundee, Edinburgh, and Glasgow—were included in this category. There was an additional category of large burgh in the Scottish system (similar to a munici ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fault (geology)
In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic forces, with the largest forming the boundaries between the plates, such as the megathrust faults of 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 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 geologic maps to represent a fault. A ''fault zone'' is a cluster of parallel faults. However, the term is also used for the zone of crushed rock along a single fault. Prolonged motion along closely spaced faults can blur the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pen Y Fan
Pen y Fan () is the highest peak in South Wales, situated in the Brecon Beacons National Park. At above sea-level, it is also the highest British peak south of Cadair Idris in Snowdonia. It is the highest point (county top) of the historic county of Brecknockshire (though in modern administrative terms, it now lies within the unitary council area of Powys). The twin summits of Pen y Fan and Corn Du at 873 m (2,864 ft) were formerly referred to as Cadair Arthur or 'Arthur's Seat'. The mountain and surrounding area are owned by the National Trust whose work parties attempt to combat the erosion caused by the popularity of this peak with walkers. The mountain is used by the military as part of the selection process of the UK's Special Forces personnel. Three soldiers who died after collapsing in the field in July 2013 were taking part in a test march called Point-to-Point while undergoing Special Air Service selection. Access The peak is a major objective in the Beac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
A470 Road
The A470 (also named the Cardiff to Glan Conwy Trunk Road) is a trunk road in Wales. It is the country's longest road at and links the capital Cardiff on the south coast to Llandudno on the north coast. While previously one had to navigate the narrow roads of Llanidloes and Dolgellau, both these market towns are now bypassed due to extensive road modernisation. The from Cardiff Bay to Merthyr Tydfil are mainly dual carriageway, but most of the route from north of Merthyr to Llandudno is single carriageway. Route National parks The road travels through two of the national parks of Wales: the Brecon Beacons, and Snowdonia National Park starting just south of Dinas Mawddwy. Cardiff Bay – Merthyr Tydfil The southernmost point of the route is in Cardiff Bay, outside the Wales Millennium Centre. It runs up Lloyd George Avenue (this was previously Collingdon Road, and the A470 previously ran along the parallel Bute Street), and continues along St. Mary Street in central Car ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hirwaun
Hirwaun is a village and community at the north end of the Cynon Valley in the County Borough of Rhondda Cynon Taf, South Wales. It is NW of the town of Aberdare, and comes under the Aberdare post town. At the 2001 census, Hirwaun had a population of 4,851. increasing at the 2011 census to 4,990. The village is on the Heads of the Valleys Road and at the southern edge of the Brecon Beacons National Park. Etymology Hirwaun (also formerly spelled as Hirwain and Herwain) derives from two common Welsh toponyms "Hir" meaning long and "Gwaun" meaning moorland. Writing in 1887, Rev. Thomas Morgan stated that the correct name is ''Hirwaun Gwrgant'', meaning Gwrgan's "Waun". This name comes from its association with Gwrgan ab Ithel (1033 - 1070), a king of Morgannwg who is said to have freely given a portion of the waun (named "Y Waun Hir") to his poor subjects and all other Welshmen for raising corn, and the breeding of sheep and cattle. Morgan further states that in olden times the w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
A4059 Road
The A4059 road is a single-carriageway north–south road that runs between the A470 road, A470 at Brecon Beacons National Park and the A470 at Abercynon. Route The road can be thought of as an alternative, but slightly longer route than the A470, the road on which both its termini are. It is a road with two parts of contrasting character, the northern half crossing through the wild rural Brecon Beacons while the southern half is at a lower elevation and is urban in nature. Southbound, the A4059 begins by turning right off the A470 to the south of Pen y Fan#Storey Arms, Storey Arms, just after passing the Beacons Reservoir. The road crosses the top of the reservoir's dam before climbing away from the trees and onto exposed moor land to the west of the A470. Thereafter the A4059 climbs to a height of , following the River Taff 100 m below. At this point along the road, the A470 can be clearly seen in the valley below. As the A4059 continues through the Brecon Beacons, the vegetat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shakehole
A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. The term is sometimes used to refer to doline, enclosed depressions that are locally also known as ''vrtače'' and shakeholes, and to openings where surface water enters into underground passages known as ''ponor'', swallow hole or swallet. A ''cenote'' is a type of sinkhole that exposes groundwater underneath. A ''sink'' or ''stream sink'' are more general terms for sites that drain surface water, possibly by infiltration into sediment or crumbled rock. Most sinkholes are caused by karst processes – the chemical dissolution of carbonate rocks, collapse or suffosion processes. Sinkholes are usually circular and vary in size from tens to hundreds of meters both in diameter and depth, and vary in form from soil-lined bowls to bedrock-edged chasms. Sinkholes may form gradually or suddenly, and are found worldwide. Formation Natural processes Sinkholes may capture surf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neath Disturbance
The Neath Disturbance is a geological structure which stretches across south Wales from Swansea Bay northeastwards as far as Hereford in western England. It consists of a series of both faults and associated folds which were active during the mountain-building period known as the Variscan orogeny. This line of weakness probably featured in the earlier Caledonian Orogeny and perhaps reflects a more ancient line of weakness in the basement rocks. The Disturbance gives rise to a lineament crossing the region, that is to say that it is responsible for a number of significant landscape features along its 100 km length. Prominent amongst these is the Vale of Neath, a deep valley incised by a glacier during the ice ages along this line of weakness in the Earth's crust and now occupied by the River Neath between Pontneddfechan and Swansea Bay. The hill of Moel Penderyn also lies on the Disturbance a little further east. A part of the Vale of Grwyne north of The Sugarloaf and th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carboniferous Period
The Carboniferous ( ) is a Period (geology), geologic period and System (stratigraphy), system of the Paleozoic that spans 60 million years from the end of the Devonian Period million years ago (Myr, Mya), to the beginning of the Permian Period, million years ago. The name ''Carboniferous'' means "coal-bearing", from the Latin ''wikt:carbo#Latin, carbō'' ("coal") and ''wikt:fero#Latin, ferō'' ("bear, carry"), and refers to the many coal beds formed globally during that time. The first of the modern 'system' names, it was coined by geologists William Conybeare (geologist), William Conybeare and William Phillips (geologist), William Phillips in 1822, based on a study of the British rock succession. The Carboniferous is often treated in North America as two geological periods, the earlier Mississippian (geology), Mississippian and the later Pennsylvanian (geology), Pennsylvanian. Terrestrial animal life was well established by the Carboniferous Period. Stegocephalia, Tetrapods ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhondda Cynon Taf
Rhondda Cynon Taf (; RCT; also spelt as Rhondda Cynon Taff) is a county borough in the south-east of Wales. It consists of five valleys: the Rhondda Fawr, Rhondda Fach, Cynon, Taff (Welsh: ''Taf'') and Ely valleys, plus a number of towns and villages away from the valleys. Results from the 2011 census showed 19.1% of its 234,410 residents self-identified as having some ability in the use of the Welsh language. The county borough borders Merthyr Tydfil County Borough and Caerphilly County Borough to the east, Cardiff and the Vale of Glamorgan to the south, Bridgend County Borough and Neath Port Talbot to the west and Powys to the north. Its principal towns are - Aberdare, Llantrisant with Talbot Green and Pontypridd, with other key settlements/towns being - Maerdy, Ferndale, Hirwaun, Llanharan, Mountain Ash, Porth, Tonypandy, Tonyrefail and Treorchy. The most populous individual town in Rhondda Cynon Taf is Aberdare ( cy, Aberdâr) with a population of 39,550 (2011), followed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marros Group
The Marros Group is the name given to a suite of rocks of Namurian age laid down during the Carboniferous Period in South Wales. These rocks were formerly known as the Millstone Grit Series but are now distinguished from the similar but geographically separate rock sequences of the Pennines and Peak District of northern England and northeast Wales by this new name. Stratigraphy The Group comprises a thick unit of coarse sandstone known as the Twrch Sandstone (formerly the ‘Basal Grit’) which is overlain by the Bishopston Mudstone and the Telpyn Point Sandstone. The mudstones of these latter two formations was formerly known as the ‘Middle Shales’, a name reflecting the position of this sequence sandwiched between the Basal Grit below and the Farewell Rock, the lowermost sandstone of the South Wales Coal Measures, above. The mudstone itself contains a few bands of sandstone such as the ‘Twelve Foot Sandstone’ and locally the ‘Cumbriense Sandstone’. Likewise the Twrc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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