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Chwarel Ddu
Chwarel Ddu quarry was the earliest slate quarry in the Lledr Valley. It was working before 1810, and continued in sporadic operation until the late 1920s. It is about west of Dolwyddelan, just beneath Dolwyddelan Castle. History The quarry is believed to have opened between 1800 and 1805. In 1810, the quarry was successful enough that the Gwydir Estate, who owned the land on which the quarry sat, constructed a cart road from the quarry to the Holyhead Road at Conwy. This now forms part of the A470. Despite this early success, the quarry only operated for short periods over the next few decade. For several years in the late 1850s, it produced significant amounts of slate, up to 700 tones per year. At this time a stationary steam engine was used to haul rock up from the open pit. By 1888 it was once more closed. There was an attempt to re-open the quarry during the 1920s, and an oil engine was installed to replace the steam engine. A small number of quarrymen were employed, ... [...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 settlement o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conwy
Conwy (, ), previously known in English as Conway, is a walled market town, community and the administrative centre of Conwy County Borough in North Wales. The walled town and castle stand on the west bank of the River Conwy, facing Deganwy on the east bank. The town formerly lay in Gwynedd and prior to that in Caernarfonshire. The community, which also includes Deganwy and Llandudno Junction, had a population of 14,753 at the 2011 census. Although the community of Conwy straddles the River Conwy, for postal purposes the areas on the east bank form part of the post town of Llandudno Junction, with the Conwy post town being confined to west bank of the river. The ward on the west bank of the river had a population of 4,065 at the 2011 census. The resident population of the wider Conwy County Borough was estimated to be 116,200 in an ONS-estimate. The name 'Conwy' derives from the old Welsh words ''cyn'' (chief) and ''gwy'' (water), the river being originally called the 'Cynwy'. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slate Mines In Conwy County Borough
Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism. It is the finest grained foliated metamorphic rock. Foliation may not correspond to the original sedimentary layering, but instead is in planes perpendicular to the direction of metamorphic compression. The foliation in slate is called "slaty cleavage". It is caused by strong compression causing fine grained clay flakes to regrow in planes perpendicular to the compression. When expertly "cut" by striking parallel to the foliation, with a specialized tool in the quarry, many slates will display a property called fissility, forming smooth flat sheets of stone which have long been used for roofing, floor tiles, and other purposes. Slate is frequently grey in color, especially when seen, en masse, covering roofs. However, slate occurs in a variety of colors even from a single locality; for exam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Syncline
In structural geology, a syncline is a fold with younger layers closer to the center of the structure, whereas an anticline is the inverse of a syncline. A synclinorium (plural synclinoriums or synclinoria) is a large syncline with superimposed smaller folds. Synclines are typically a downward fold (synform), termed a synformal syncline (i.e. a trough), but synclines that point upwards can be found when strata have been overturned and folded (an antiformal syncline). Characteristics On a geologic map, synclines are recognized as a sequence of rock layers, with the youngest at the fold's center or ''hinge'' and with a reverse sequence of the same rock layers on the opposite side of the hinge. If the fold pattern is circular or elongate, the structure is a basin. Folds typically form during crustal deformation as the result of compression that accompanies orogenic mountain building. Notable examples * Powder River Basin, Wyoming, US * Sideling Hill roadcut along Interstate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nod Glas Formation
The Nod Glas Formation (also known as the Nod Glas Black Shale, the Cadnant Shale, the Penarwel Mudstones or just Nod Glas) is an Ordovician lithostratigraphic group (a sequence of rock strata) in Mid Wales. The rock of the formation is made up of pyritous, graptolitic mudstone that is generally black in colour. It weathers to a soft, very well cleaved and coal-like material. The formation runs from Conwy in the north, down to Cardigan Bay in the area around Aberdyfi and Tywyn, though it is not a continuous over this area. The formation is the topmost of the Caradoc Series in North Wales, and the name refers to all the black shale beds in the area. In South Wales, the equivalent beds of shale are called the Dicranograptus Shales. North Wales Between Tywyn and Aberllefenni the Nod Glas Formation is about thick. The section between Aberllefenni and Aberangell is the type locality for the formation. North of Corris, towards Bwlch y Groes, the formation gradually thins and ceases ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Track (rail Transport)
A railway track (British English and UIC terminology) or railroad track (American English), also known as permanent way or simply track, is the structure on a railway or railroad consisting of the rails, fasteners, railroad ties (sleepers, British English) and ballast (or slab track), plus the underlying subgrade. It enables trains to move by providing a dependable surface for their wheels to roll upon. Early tracks were constructed with wooden or cast iron rails, and wooden or stone sleepers; since the 1870s, rails have almost universally been made from steel. Historical development The first railway in Britain was the Wollaton Wagonway, built in 1603 between Wollaton and Strelley in Nottinghamshire. It used wooden rails and was the first of around 50 wooden-railed tramways built over the next 164 years. These early wooden tramways typically used rails of oak or beech, attached to wooden sleepers with iron or wooden nails. Gravel or small stones were packed around the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crude Oil Engine
The crude oil engine is a type of internal combustion engine similar to the hot bulb engine. A crude oil engine could be driven by all sorts of oils such as engine waste oil and vegetable oils. Even peanut oil and butter could be used as fuel if necessary. Like hot bulb engines, crude oil engines were mostly used as stationary engines or in boats/ships. They can run for a very long time; for instance, at the Milan International (1906), world fair in Milan in 1906, a FRAM engine was started and ran until the exhibition was over one month later. A crude oil engine is a low RPM engine dimensioned for constant running and can last for a very long time if maintained properly. Modern crude oil engines Large industrial diesel engines are capable of running on unrefined crude oil, and are widely used in the oil and gas industry. Additionally, large medium-speed and low-speed marine engines used on ships can also run on crude oil, although significant filtering and processing is often neede ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stationary Steam Engine
Stationary steam engines are fixed steam engines used for pumping or driving mills and factories, and for power generation. They are distinct from locomotive engines used on railways, traction engines for heavy steam haulage on roads, steam cars (and other motor vehicles), agricultural engines used for ploughing or threshing, marine engines, and the steam turbines used as the mechanism of power generation for most nuclear power plants. They were introduced during the 18th century and widely made for the whole of the 19th century and most of the first half of the 20th century, only declining as electricity supply and the internal combustion engine became more widespread. Types of stationary steam engine There are different patterns of stationary steam engines, distinguished by the layout of the cylinders and crankshaft: * Beam engines have a rocking beam providing the connection between the vertical cylinder and crankshaft. *Table engines have the crosshead above the vert ... [...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] |
Map Of Chwarel Ddu In 1888
A map is a symbolic depiction emphasizing relationships between elements of some space, such as objects, regions, or themes. Many maps are static, fixed to paper or some other durable medium, while others are dynamic or interactive. Although most commonly used to depict geography, maps may represent any space, real or fictional, without regard to context or scale, such as in brain mapping, DNA mapping, or computer network topology mapping. The space being mapped may be two dimensional, such as the surface of the earth, three dimensional, such as the interior of the earth, or even more abstract spaces of any dimension, such as arise in modeling phenomena having many independent variables. Although the earliest maps known are of the heavens, geographic maps of territory have a very long tradition and exist from ancient times. The word "map" comes from the , wherein ''mappa'' meant 'napkin' or 'cloth' and ''mundi'' 'the world'. Thus, "map" became a shortened term referring to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dolwyddelan
Dolwyddelan ( ; ; ) – in Victorian times, often spelled Dolyddelen – is a village and community in Conwy county borough, Wales, on the main A470 road between Blaenau Ffestiniog and Betws-y-Coed. As a community, the population of Dolwyddelan was recorded in the 2001 Census as 427, and 55.8% of those residents could speak Welsh. The population increased to 474 in the 2011 census with the proportion of Welsh speakers falling to 50.8%. Name The spelling of the village's name has varied over the years, though there appear to be two primary spellings with two primary meanings. The common modern spelling "Dolwyddelan" is translated as "Gwyddelan's meadow", referring to Saint Gwyddelan, an Irish missionary of the 6th century, after whom the parish church is named. There is some question as to which came first, the castle or the name. Saint Gwyddelan is believed to have arrived around 600 AD. A variant of this spelling is Dolwyddelen, which was particularly used by the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dolwyddelan Castle
Dolwyddelan Castle ( ; cy, Castell Dolwyddelan; ) is a Welsh castle located near Dolwyddelan in Conwy County Borough in North Wales. It is thought to have been built in the early 13th century by Llywelyn the Great, Prince of Gwynedd and Wales. Initially comprising just one tower with two floors, a second tower was built in the late 13th century, and a third floor was added to the first during repairs in the late 15th century. Construction The castle was built, using mostly local grit and slate rubble, as one of the Snowdonian strongholds of the princes of Gwynedd. Though there are no records of the exact construction date, it is thought that a single rectangular tower, with two floors, was built in the early 13th century. The first floor would have consisted of a main chamber with a fireplace, with a trapdoor for entrance to the basement, and the main keep's doorway would have been covered by a porch or forebuilding. The second two-storey tower was added by Edward I during ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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