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Bala Fault
The Bala Fault is a SW-NE trending geological fault in Wales that extends offshore into Cardigan Bay. In the offshore area it is a major normal fault and forms the bounding structure to the Cardigan Bay Basin, with a fill including about of Lias Group. Onshore it is responsible for the lineament which runs through Bala and south of Cadair Idris to the coast at Tywyn. At its northeastern end it links to the similarly orientated Llanelidan Fault. The fault is believed to have had two separate stages of movement. The horizons between the upper Carboniferous sequence and the underlying Jurassic sequence are parallel, so little rotational movement occurred. The second stage of movement happened in the middle-to-late Jurassic period, when strong rotation happened, up to 24 degrees. See also *List of geological faults of Wales This is a list of the named geological faults affecting the rocks of Wales. See the main article on faults for a fuller treatment of fault types and nomencl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Down The Hill Towards Talyllyn Lake On A487 - Geograph
Down most often refers to: * Down, the relative direction opposed to up * Down (gridiron football), in American/Canadian football, a period when one play takes place * Down feather, a soft bird feather used in bedding and clothing * Downland, a type of hill Down may also refer to: Places * County Down, Northern Ireland, UK ** Down (Parliament of Ireland constituency), abolished 1800 ** Down (Northern Ireland Parliament constituencies) ** Down (Northern Ireland Parliament constituency), 1921–1929 ** Down (UK Parliament constituency), 1801–1885 and 1922–1950 ** Down (civil parish) ** Down county football team, Gaelic football * Down, County Westmeath, Ireland * Downe, Greater London, England, formerly called "Down" People * Down (surname) * John Langdon Down (1828–1896), British physician best known for his description of Down syndrome * Down AKA Kilo (born 1985), American rapper Film and television * ''Down'' (film), a 2001 English remake of the film ''De Lift'' * " ... [...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] |
Wales
Wales ( cy, Cymru ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by England to the Wales–England border, east, the Irish Sea to the north and west, the Celtic Sea to the south west and the Bristol Channel to the south. It had a population in 2021 of 3,107,500 and has a total area of . Wales has over of coastline and is largely mountainous with its higher peaks in the north and central areas, including Snowdon (), its highest summit. The country lies within the Temperateness, north temperate zone and has a changeable, maritime climate. The capital and largest city is Cardiff. Welsh national identity emerged among the Celtic Britons after the Roman withdrawal from Britain in the 5th century, and Wales was formed as a Kingdom of Wales, kingdom under Gruffydd ap Llywelyn in 1055. Wales is regarded as one of the Celtic nations. The Conquest of Wales by Edward I, conquest of Wales by Edward I of England was completed by 1283, th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cardigan Bay
Cardigan Bay ( cy, Bae Ceredigion) is a large inlet of the Irish Sea, indenting the west coast of Wales between Bardsey Island, Gwynedd in the north, and Strumble Head, Pembrokeshire at its southern end. It is the largest bay in Wales. Geography Cardigan Bay has numerous beaches, and marine life. Much of the coast surrounding the bay is fertile farmland, dotted with towns and seaside resorts such as Fishguard Fishguard ( cy, Abergwaun, meaning "Mouth of the River Gwaun") is a coastal town in Pembrokeshire, Wales, with a population of 3,419 in 2011; the community of Fishguard and Goodwick had a population of 5,407. Modern Fishguard consists of two p ..., New Quay, Aberaeron, Llanon, Aberystwyth, Borth, Aberdyfi, Tywyn, Barmouth, Porthmadog, Criccieth and Pwllheli on the Cambrian Coast. Smaller coastal villages include Cwmtydu, Nanternis and Llangrannog. Major rivers flowing into the bay include the Afon Glaslyn, Glaslyn, River Mawddach, Mawddach, River Dysynni, Dysynni, Ri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lias Group
The Lias Group or Lias is a lithostratigraphic unit (a sequence of rock strata) found in a large area of western Europe, including the British Isles, the North Sea, the Low Countries and the north of Germany. It consists of marine limestones, shales, marls and clays. ''Lias'' is a Middle English term for hard limestone, used in this specific sense by geologists since 1833. In the past, geologists used ''Lias'' not only for the sequence of rock layers, but also for the timespan during which they were formed. It was thus an alternative name for the Early Jurassic epoch of the geologic timescale. It is now more specifically known that the Lias is Rhaetian to Toarcian in age (over a period of 20 million years between ) and thus also includes a part of the Triassic. The use of the name "Lias" for a unit of time is therefore slowly disappearing. Subdivisions In southern England, the Lias Group is often divided into Lower, Middle and Upper subgroups. In Southern England the Lias is d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lineament
''See also Line (geometry)'' A lineament is a linear feature in a landscape which is an expression of an underlying geological structure such as a fault. Typically a lineament will appear as a fault-aligned valley, a series of fault or fold-aligned hills, a straight coastline or indeed a combination of these features. Fracture zones, shear zones and igneous intrusions such as dykes can also be expressed as geomorphic lineaments. Lineaments are often apparent in geological or topographic maps and can appear obvious on aerial or satellite photographs. There are for example, several instances within Great Britain. In Scotland the Great Glen Fault and Highland Boundary Fault give rise to lineaments as does the Malvern Line in western England and the Neath Disturbance in South Wales. The term 'megalineament' has been used to describe such features on a continental scale. The trace of the San Andreas Fault might be considered an example.Whitten & Brooks, The Penguin Dictionary of Ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bala, Gwynedd
Bala ( cy, Y Bala) is a town and community in Gwynedd, Wales. Formerly an urban district, Bala lies in the historic county of Merionethshire, at the north end of Bala Lake ( cy, Llyn Tegid). According to the 2021 Census, Bala had a population of 1,999. 72.5 per cent of the population can speak Welsh. Toponym The Welsh word ''bala'' refers to the outflow of a lake. History The Tower of Bala ''(Welsh: Tomen y Bala)'' ( high by diameter) is a tumulus or "moat-hill", formerly thought to mark the site of a Roman camp. In the 18th century, the town was well known for the manufacture of flannel, stockings, gloves and hosiery. The large stone-built theological college, ''Coleg y Bala'', of the Calvinistic Methodists and the grammar school (now Ysgol y Berwyn), which was founded in 1712, are the chief features, together with the statue of the Rev. Thomas Charles (1755–1814), the theological writer, to whom was largely due the foundation of the British and Foreign Bible Socie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cadair Idris
Cadair Idris or Cader Idris is a mountain in the Meirionnydd area of Gwynedd, Wales. It lies at the southern end of the Snowdonia National Park near the town of Dolgellau. The peak, which is one of the most popular in Wales for walkers and hikers, is composed largely of Ordovician igneous rocks, with classic glacial erosion features such as cwms, moraines, striated rocks, and roches moutonnées. Etymology ''Cadair Idris'' means 'Idris's Chair'. Idris is usually taken to be the name of a giant or, alternatively, it may refer to Idris ap Gwyddno (or Gweiddno), a 7th-century prince of Meirionnydd who won a battle against the Irish on the mountain. Idris ap Gwyddno was in fact referred to as ''Idris Gawr'' ("Idris the Giant") in some mediaeval genealogies of Meirionydd. The basic meaning of the word ''cadair'' (Middle Welsh/Early Modern Welsh ''kadeir'' or ''cadeir'') is 'seat, chair' (borrowed from the Greek ''cathedra'' 'chair'). In place names ''cadair'' can mean 'stronghold, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tywyn
Tywyn (Welsh: ; in English often ), formerly spelled Towyn, is a town, community, and seaside resort on the Cardigan Bay coast of southern Gwynedd, Wales. It was previously in the historic county of Merionethshire. It is famous as the location of the Cadfan Stone, a stone cross with the earliest known example of written Welsh, and the home of the Talyllyn Railway. Toponymy The name derives from the Welsh ''tywyn'' ("beach, seashore, sand-dune"): extensive sand dunes lie to the north and south of the town. In Middle Welsh, the spelling was generally ''Tywyn''. In the Early Modern period, however, the spelling ''Towyn'' became common in Welsh in order to reflect a slight change in pronunciation at that time. That also came to be the usual spelling in English up to the latter part of the twentieth century. The modern spelling ''Tywyn'' better reflects the current pronunciation in modern Welsh as spoken in north Wales. With the standardisation of the orthography of the Welsh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Llanelidan Fault
Llanelidan is a small village and community in the county of Denbighshire in north-east Wales. The community also includes the hamlet of Rhyd-y-Meudwy. The church, village hall and pub all lie within 200 yards of each other overlooking the village cricket ground and pavilion. Also in the village centre is King George's field, this is land legally protected by the Fields in Trust Charity, and is free for use by anyone. Public space in the village includes the Village Green. This is 3 1/2 acres of registered Village Green Denbighshire Commons Register No. VG12 Ancient and semi natural woodland that is a bluebell wood in the spring. It was allotted to be held IN TRUST for the Community of Llanelidan by the Inclosure Awards of 1861 and is for the enjoyment and recreation of members of the Parish. It lies north west of the village along a footpath towards Coed Pen Y Bryn. Reference ; Public Record Office MAF 1/243 EXMID 13430 and Map date 1816 found at RRO EXMID 15388 Denbigh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carboniferous
The Carboniferous ( ) is a geologic period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period million years ago ( Mya), to the beginning of the Permian Period, million years ago. The name ''Carboniferous'' means "coal-bearing", from the Latin '' carbō'' ("coal") and '' 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 and 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 and the later Pennsylvanian. Terrestrial animal life was well established by the Carboniferous Period. Tetrapods (four limbed vertebrates), which had originated from lobe-finned fish during the preceding Devonian, became pentadactylous in and diversified during the Carboniferous, including early amphibian line ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jurassic
The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The Jurassic constitutes the middle period of the Mesozoic, Mesozoic Era and is named after the Jura Mountains, where limestone strata from the period were first identified. The start of the Jurassic was marked by the major Triassic–Jurassic extinction event, associated with the eruption of the Central Atlantic magmatic province, Central Atlantic Magmatic Province. The beginning of the Toarcian Stage started around 183 million years ago and is marked by an extinction event associated with widespread Anoxic event, oceanic anoxia, ocean acidification, and elevated temperatures likely caused by the eruption of the Karoo-Ferrar, Karoo-Ferrar large igneous provinces. The end of the Jurassic, however, has no clear boundary with the Cretaceous and i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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