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Vale Of Clwyd
The Vale of Clwyd ( cy, Dyffryn 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Principal Area Of Wales
Since 1 April 1996, Wales has been divided into 22 single-tier principal areas ( cy, Awdurdodau unedol), styled as counties or county boroughs ( or ) for local government purposes. The elected councils of these areas are responsible for the provision of all local government services, including education, social work, environmental protection, and most highways. Below these there are also (in most, but not all, parts of the principal areas) elected community councils to which responsibility for specific aspects of the application of local policy may be devolved. The last set of local elections in Wales took place in 2022, with the next due to take place in 2027. The monarch appoints a lord lieutenant as a representative in each of the eight preserved counties of Wales, which are combinations of principal areas retained for ceremonial purposes. Subdivisions of Wales created for such purposes as the organisation of the National Health Service and the provision of police and eme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
St Asaph
St Asaph (; cy, Llanelwy "church on the Elwy") is a city and community on the River Elwy in Denbighshire, Wales. In the 2011 Census it had a population of 3,355, making it the second-smallest city in Britain in terms of population and urban area. It is in the historic county of 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 busy coastal towns such as Rhyl, Prestatyn, Abergele, Colwyn Bay and Llandudno. The historic castles of Denbigh and Rhuddlan are also nearby History The earliest inhabitants of the vale of Elwy lived at the nearby Paleolithic site of 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-western site in Eurasia for remains of early hominids and is considered of international importance. Base ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sandstone
Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates) because they are the most resistant minerals to weathering processes at the Earth's surface. Like uncemented sand, sandstone may be any color due to impurities within the minerals, but the most common colors are tan, brown, yellow, red, grey, pink, white, and black. Since sandstone beds often form highly visible cliffs and other topographic features, certain colors of sandstone have been strongly identified with certain regions. Rock formations that are primarily composed of sandstone usually allow the percolation of water and other fluids and are porous enough to store large quantities, making them valuable aquifers and petroleum reservoirs. Quartz-bearing sandstone can be changed into quartzite through metamorphism, usually relate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triassic
The Triassic ( ) is a geologic period and system (stratigraphy), system which spans 50.6 million years from the end of the Permian Period 251.902 million years ago (Year#Abbreviations yr and ya, Mya), to the beginning of the Jurassic Period 201.36 Mya. The Triassic is the first and shortest period of the Mesozoic, Mesozoic Era. 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 Permian–Triassic 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 chief terrestrial vert ... [...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 251.9 Mya. It is the 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 drier conditi ... [...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 Wem–Audlem Sub-basin and the Sandbach–Knutsford 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 Mu ... [...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 ... [...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. The crust thins and sinks, forming a rift basin. Warm mantle material wells up, melting the crust and often causing volcanoes to emerge in the rift basin. Extensional basins may appear to be caused by a graben, or depressed block of land, sinking between parallel normal faults that dip towards th ... [...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 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 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 tectonic activity. Mechanisms of crustal deformation that lead to subsidence and sedimentary basin formation include the thinning of underlying crust; depression ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vale Of Clwyd (UK Parliament Constituency)
The Vale of Clwyd ( cy, Dyffryn Clwyd) is a constituency of the House of Commons of the UK Parliament created in 1997 and represented since 2019 by James Davies of the Conservative Party. As with all extant seats its electorate elect one Member of Parliament (MP) by the first past the post system at least every five years. The Vale of Clwyd Senedd constituency was created with the same boundaries in 1999 (as an Assembly constituency). Boundaries 1997–2010: The Borough of Rhuddlan, the District of Glyndwr wards of Denbigh Central, Denbigh Lower, Denbigh Upper, Henllan, and Llandyrnog, and the Borough of Colwyn ward of Trefnant. 2010–present: The Denbighshire County electoral divisions of Bodelwyddan, Denbigh Central, Denbigh Lower, Denbigh Upper/Henllan, Dyserth, Llandyrnog, Prestatyn Central, Prestatyn East, Prestatyn Meliden, Prestatyn North, Prestatyn South West, Rhuddlan, Rhyl East, Rhyl South, Rhyl South East, Rhyl South West, Rhyl West, St Asaph East, St Asaph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conwy County Borough
Conwy County Borough ( cy, Bwrdeistref Sirol Conwy) is a county borough in Wales. It borders Gwynedd to the west and south, and Denbighshire to the east. Other settlements in the county borough include Abergele, Betws-y-Coed, Colwyn Bay, Conwy, Llandudno, Llandudno Junction, Llanfairfechan, Llanrwst, and Penmaenmawr. Geography The River Conwy, after which the county borough is named, lies wholly within the area: rising in Snowdonia and flowing through Llanrwst and Trefriw en route to the Irish Sea by Conwy. The river here marks the border between the historic counties of Caernarfonshire and Denbighshire. One third of the land area of the county borough lies in the Snowdonia National Park, and the council appoint three of the 18 members of the Snowdonia National Park Authority. Its total area is , making it slightly larger than Hong Kong. The eastern part includes the larger section of Denbigh Moors. The vast majority of the population live on the coast; the only set ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unitary Authority
A unitary authority is a local authority responsible for all local government functions within its area or performing additional functions that elsewhere are usually performed by a higher level of sub-national government or the national government. Typically unitary authorities cover towns or 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. Canada In Canada, each province creates its own system of local government, so terminology varies substantially. In certain provinces (e.g. Alberta, Nova Scotia) there is ''only'' one level of local government in that province, so no special term is used to describe the situation. British Columbia has only one such municipality, Northern Rockies Regional Municipality, which was established in 2009. In Ontario the term single-tier municipalities is used, for a similar concept. Their character varies, and while most function as cities wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saunders_Quarry-1.jpg "Click for more on -> Sandstone")
