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Vale Of Clwyd
The Vale of Clwyd () is a tract of low-lying ground in the county of Denbighshire in north-east Wales. The Vale extends south-southwestwards from the coast of the Irish Sea for some 20 miles (about 30 km) forming a triangle of low ground bounded on its eastern side by the well-defined scarp of the Clwydian Range and to the west by numerous low hills. The River Clwyd (Welsh: ) which rises within Clocaenog Forest, southwest of Denbigh, runs the full length of the vale. It is joined by the two major left bank tributaries of the River Clywedog (Welsh: ) and River Elwy (Welsh: ) and the smaller right bank tributary of the River Wheeler (Welsh: ). History Dyffryn Clwyd was a cantref of Medieval Wales, and from 1282 was a marcher lordship. Settlement and administration At its seaward end are the coastal resorts of Kinmel Bay (Welsh: ), Rhyl and Prestatyn whilst the town of Abergele and city of St Asaph (Welsh: ) lie just inland. The other principal towns of the vale are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dyffryn Clwyd
Dyffryn Clwyd was a cantref of Medieval Wales and from 1282 a marcher lordship. In 1536, it became part of the new county of Denbighshire. The name means Vale of Clwyd in English and is still the name for that region of north Wales in modern Welsh. Dyffryn Clwyd was one of the cantrefi of Perfeddwlad, and itself was made up of three commotes, Colion, Dogfeiling and Llannerch. The lordship was granted in 1282 to Reginald de Grey, 1st Baron Grey de Wilton,''The Welsh Academy Encyclopaedia of Wales''. John Davies, Nigel Jenkins, Menna Baines and Peredur Lynch (2008) p. 334 Justice of Chester and Edward I's commander for his campaign of 1282 into north Wales. The lordship remained in the Grey family until Richard Grey, 6th Baron Grey de Ruthyn, 3rd Earl of Kent sold it to Henry VII in 1508. Marcher Lords of Dyffryn Clwyd *Reginald de Grey, 1st Baron Grey de Wilton Reginald de Grey, 1st Baron Grey of Wilton (c. 1240 â 5 April 1308) was an English nobleman after whom one of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
St Asaph
St Asaph (; "church on the Elwy") is a City status in the United Kingdom, cathedral city and community (Wales), community on the River Elwy in Denbighshire, Wales. At the 2021 United Kingdom census, 2021 census the community had a population of 3,485, making it the List of smallest cities in the United Kingdom, second-smallest city in the United Kingdom in terms of population. It was historically in Flintshire (historic), Flintshire. The city of St Asaph is surrounded by countryside and views of the Vale of Clwyd. It is situated close to a number of towns including Denbigh, Rhuddlan, Rhyl, Holywell, Flintshire, Holywell and Abergele. History The earliest inhabitants of the vale of Elwy lived at the nearby Paleolithic site of Pontnewydd Cave, Pontnewydd (Bontnewydd), which was excavated from 1978 by a team from the University of Wales, led by Stephen Aldhouse Green. Teeth and part of a jawbone excavated in 1981 were dated to 225,000 years ago. This site is the most north-west ... [...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] |
Triassic
The Triassic ( ; sometimes symbolized đ) is a geologic period and system which spans 50.5 million years from the end of the Permian Period 251.902 million years ago ( Mya), to the beginning of the Jurassic Period 201.4 Mya. The Triassic is the first and shortest period of the Mesozoic Era and the seventh period of the Phanerozoic Eon. Both the start and end of the period are marked by major extinction events. The Triassic Period is subdivided into three epochs: Early Triassic, Middle Triassic and Late Triassic. The Triassic began in the wake of the PermianâTriassic extinction event, which left the Earth's biosphere impoverished; it was well into the middle of the Triassic before life recovered its former diversity. Three categories of organisms can be distinguished in the Triassic record: survivors from the extinction event, new groups that flourished briefly, and other new groups that went on to dominate the Mesozoic Era. Reptiles, especially archosaurs, were the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Permian
The Permian ( ) is a geologic period and System (stratigraphy), stratigraphic system which spans 47 million years, from the end of the Carboniferous Period million years ago (Mya), to the beginning of the Triassic Period 251.902 Mya. It is the sixth and last period of the Paleozoic Era; the following Triassic Period belongs to the Mesozoic Era. The concept of the Permian was introduced in 1841 by geologist Sir Roderick Murchison, who named it after the Perm Governorate, region of Perm in Russia. The Permian witnessed the diversification of the two groups of amniotes, the synapsids and the Sauropsida, sauropsids (reptiles). The world at the time was dominated by the supercontinent Pangaea, which had formed due to the collision of Euramerica and Gondwana during the Carboniferous. Pangaea was surrounded by the superocean Panthalassa. The Carboniferous rainforest collapse left behind vast regions of desert within the continental interior. Amniotes, which could better cope with these ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cheshire Basin
The Cheshire Basin is a late Palaeozoic and Mesozoic sedimentary basin extending under most of the county of Cheshire in northwest England. It extends northwards into the Manchester area and south into Shropshire. The basin possesses something of the character of a half-graben as its deepest extent is along its eastern and southeastern margins, where it is well defined by a series of sub-parallel faults, most important of which is the Red Rock Fault. These faults divide the basin from the older Carboniferous rocks of the Peak District and the North Staffordshire Coalfield. In terms of its architecture, the basin is sometimes considered to be divided into two sub-basins: the more southerly WemâAudlem Sub-basin and the SandbachâKnutsford Sub-basin to its northeast. The basin fill is mainly Permian and Triassic sandstones and mudstones, but it also incorporates economically important halite beds. The sequences referred to the Sherwood Sandstone Group and the overlying Mercia M ... [...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] |
Half-graben
A half-graben is a geological structure bounded by a fault along one side of its boundaries, unlike a full graben where a depressed block of land is bordered by parallel faults. Rift and fault structure A rift is a region where the lithosphere extends as two parts of the Earth's crust pull apart. Often a rift will form in an area of the crust that is already weakened by earlier geological activity. Extensional faults form parallel to the axis of the rift. An extensional fault may be seen as a crack in the crust that extends down at an angle to the vertical. As the two sides pull apart, the hanging wall ("hanging over" the sloping fault) will move downward relative to the footwall. A rift basin is created as the crust thins and sinks. In the rift basin, warm mantle material wells up, melting the crust and frequently triggering the eruption of volcanoes. Extensional basins may appear to be caused by a graben, or depressed block of land, sinking between parallel normal fault ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sedimentary Basin
Sedimentary basins are region-scale depressions of the Earth's crust where subsidence has occurred and a thick sequence of sediments have accumulated to form a large three-dimensional body of sedimentary rock They form when long-term subsidence creates a regional depression that provides Accommodation (geology), accommodation space for accumulation of sediments. Over millions or tens or hundreds of millions of years the deposition of sediment, primarily gravity-driven transportation of water-borne eroded material, acts to fill the depression. As the sediments are buried, they are subject to increasing pressure and begin the processes of compaction (geology), compaction and lithification that transform them into sedimentary rock. Sedimentary basins are created by deformation of Earth's lithosphere in diverse geological settings, usually as a result of plate tectonics, plate tectonic activity. Mechanisms of crustal deformation that lead to subsidence and sedimentary basin formatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vale Of Clwyd (UK Parliament Constituency)
The Vale of Clwyd () was a United Kingdom constituencies, constituency of the House of Commons of the United Kingdom, House of Commons of the Parliament of the United Kingdom, UK Parliament created in 1997. As with all seats it elected one Member of Parliament (United Kingdom), Member of Parliament (MP) by the first past the post system at least every five years. The Vale of Clwyd (Senedd constituency), Vale of Clwyd Senedd constituency was created with the same boundaries in 1999 (as an Assembly constituency). The constituency was abolished as part of the 2023 Periodic Review of Westminster constituencies and under the List of parliamentary constituencies in Wales#Final recommendations, June 2023 final recommendations of the Boundary Commission for Wales. Its area was split between Clwyd East (UK Parliament constituency), Clwyd East and Clwyd North (UK Parliament constituency), Clwyd North, to be first contested at the 2024 United Kingdom general election, 2024 general electi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conwy County Borough
Conwy County Borough () is a Principal areas of Wales, county borough in the north Wales, north of Wales. It borders Gwynedd to the west and south and Denbighshire to the east. The largest settlement is Colwyn Bay, and Conwy is the administrative centre. Conwy has an area of and a population of in , making it sparsely populated. The population is concentrated along the coast, along which are several seaside resorts and the county's largest towns: Colwyn Bay (34,284), Llandudno (20,701), and Conwy (14,753). Inland is much less populous, and the only town is Llanrwst (3,323). Geography The geography of Conwy is shaped by the River Conwy, which forms a wide valley down the western half of the county, bordered by the Denbigh Moors to the east and the mountains of Snowdonia National parks of the United Kingdom, National Park to the west. The River Elwy, a tributary of the River Clwyd, Clwyd, drains the eastern half of the moors. The Conwy forms a wide estuary as it reaches the co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unitary Authority
A unitary authority is a type of local government, local authority in New Zealand and the United Kingdom. Unitary authorities are responsible for all local government functions within its area or performing additional functions that elsewhere are usually performed by a multiple tiers of local government. Typically unitary authorities cover towns or city, cities which are large enough to function independently of a council or other authority. An authority can be a unit of a county or combined authority. New Zealand In local government in New Zealand, New Zealand, a unitary authority is a territorial authorities of New Zealand, territorial authority (district, city or metropolitan area) that also performs the functions of a regions of New Zealand, regional council (first-level division). There are five unitary authorities, they are (with the year they were constituted): Gisborne District Council (1989), Tasman District Council (1992), Nelson City Council (1992), Marlborough Distric ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
