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Bronnant Fault
The Bronnant Fault is a geological fault affecting the lower Palaeozoic rocks of the counties of Ceredigion and Pembrokeshire in West Wales. The feature is mapped over part of its length as the Bronnant Fault Zone and is closely associated with the Glandyfi Lineament, a similarly aligned zone of faulting and folding. The rocks of the Aberystwyth Grits Group dating from the Llandovery epoch of the Silurian period thicken markedly to the west of the fault suggesting it was active at the time of their deposition. North of Lledrod its alignment is affected by cross-cutting east–west faults, including the Ystwyth Fault Zone. Its alignment is sub-parallel to the coast of Cardigan Bay thus curving from a north–south alignment in the north through a northeast–southwest alignment until it merges with broadly east–west aligned faults in northeast Pembrokeshire.British Geological Survey 2010 Fishguard. England and Wales sheet 210. Bedrock and superficial deposits. 1:50,000 (Keyworth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palaeozoic
The Paleozoic (or Palaeozoic) Era is the earliest of three geologic eras of the Phanerozoic Eon. The name ''Paleozoic'' ( ;) was coined by the British geologist Adam Sedgwick in 1838 by combining the Greek words ''palaiós'' (, "old") and ''zōḗ'' (), "life", meaning "ancient life" ). It is the longest of the Phanerozoic eras, lasting from , and is subdivided into six geologic periods (from oldest to youngest): # Cambrian # Ordovician # Silurian # Devonian # Carboniferous # Permian The Paleozoic comes after the Neoproterozoic Era of the Proterozoic Eon and is followed by the Mesozoic Era. The Paleozoic was a time of dramatic geological, climatic, and evolutionary change. The Cambrian witnessed the most rapid and widespread diversification of life in Earth's history, known as the Cambrian explosion, in which most modern phyla first appeared. Arthropods, molluscs, fish, amphibians, reptiles, and synapsids all evolved during the Paleozoic. Life began in the ocean but eve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceredigion
Ceredigion ( , , ) is a county in the west of Wales, corresponding to the historic county of Cardiganshire. During the second half of the first millennium Ceredigion was a minor kingdom. It has been administered as a county since 1282. Ceredigion is considered a centre of Welsh culture and just under half of the population can speak Welsh according to the 2011 Census. The county is mainly rural, with over of coastline and a mountainous hinterland. The numerous sandy beaches and the long-distance Ceredigion Coast Path provide views of Cardigan Bay. In the 18th and early 19th centuries, Cardiganshire had more industry than it does today; Cardigan was the commercial centre of the county; lead, silver and zinc were mined and Cardigan was the principal port of South Wales prior to the silting of its harbour. The economy became highly dependent on dairy farming and the rearing of livestock for the English market. During the 20th century, livestock farming became less profitable ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pembrokeshire
Pembrokeshire ( ; cy, Sir Benfro ) is a Local government in Wales#Principal areas, county in the South West Wales, south-west of Wales. It is bordered by Carmarthenshire to the east, Ceredigion to the northeast, and the rest by sea. The county is home to Pembrokeshire Coast National Park. The Park occupies more than a third of the area of the county and includes the Preseli Hills in the north as well as the Pembrokeshire Coast Path. Historically, mining and fishing were important activities, while industry nowadays is focused on agriculture (86 per cent of land use), oil and gas, and tourism; Pembrokeshire's beaches have won many awards. The county has a diverse geography with a wide range of geological features, habitats and wildlife. Its prehistory and modern history have been extensively studied, from tribal occupation, through Roman times, to Welsh, Irish, Norman, English, Scandinavian and Flemish influences. Pembrokeshire County Council's headquarters are in the county ... [...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] |
Glandyfi Lineament
Glandyfi (formerly anglicised as Glandovey) is a small hamlet in the county of Ceredigion in Wales on the A487 trunk road from Machynlleth to Aberystwyth . Glandyfi Castle was built in the Regency Gothic style in 1810 for George Jeffreys. The Jeffreys family remained in possession of the castle until 1906, when the estate was broken up and sold at auction. The castle itself was bought by Robert John Spurrell (elder son of Daniel Spurrell of Bessingham, Norfolk), who remained there until his death in 1929. It was later the home of Sir Bernard and Lady Docker, and until September 2019, operated as a bed and breakfast. Glandyfi Castle has been a Grade II listed building since 1964 as "the only castellated country house in the county". As of April 2020, the castle was again on the market. The property contains a number of gardens planted at different times in its history. It is located close to the site of Aberdyfi Castle, which dates back to 1156. According to Visit Wales in ... [...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] |
Fold (geology)
In structural geology, a fold is a stack of originally planar surfaces, such as sedimentary strata, that are bent or curved during permanent deformation. Folds in rocks vary in size from microscopic crinkles to mountain-sized folds. They occur as single isolated folds or in periodic sets (known as ''fold trains''). Synsedimentary folds are those formed during sedimentary deposition. Folds form under varied conditions of stress, pore pressure, and temperature gradient, as evidenced by their presence in soft sediments, the full spectrum of metamorphic rocks, and even as primary flow structures in some igneous rocks. A set of folds distributed on a regional scale constitutes a fold belt, a common feature of orogenic zones. Folds are commonly formed by shortening of existing layers, but may also be formed as a result of displacement on a non-planar fault (''fault bend fold''), at the tip of a propagating fault (''fault propagation fold''), by differential compaction or due to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aberystwyth Grits Group
The Aberystwyth Grits Group is a Silurian lithostratigraphic group (a sequence of rock strata) in mid Wales. The name is derived from Aberystwyth in northern Ceredigion where the strata are well exposed in coastal cliffs. The Group comprises the Trefechan Formation and the underlying Mynydd Bach Formation. The rocks of the Aberystwyth Grits Group have also previously been known as the Aberystwyth Grits Formation Outcrops These rocks are exposed, along the Cardigan Bay coast both to the east and west of New Quay and northwards through Aberaeron and Aberystwyth to just short of Borth. They extend eastwards, though are usually obscured, in a belt of country between roughly 5 km and 10 km wide reaching from the coast. Much of the eastern boundary is defined by the Bronnant Fault. Lithology and stratigraphy The Group comprises several hundred metres thickness of mudstone and sandstone turbidites laid down in the marine Welsh Basin The Welsh Basin was a northeast-southwest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silurian
The Silurian ( ) is a geologic period and system spanning 24.6 million years from the end of the Ordovician Period, at million years ago ( Mya), to the beginning of the Devonian Period, Mya. The Silurian is the shortest period of the Paleozoic Era. As with other geologic periods, the rock beds that define the period's start and end are well identified, but the exact dates are uncertain by a few million years. The base of the Silurian is set at a series of major Ordovician–Silurian extinction events when up to 60% of marine genera were wiped out. One important event in this period was the initial establishment of terrestrial life in what is known as the Silurian-Devonian Terrestrial Revolution: vascular plants emerged from more primitive land plants, dikaryan fungi started expanding and diversifying along with glomeromycotan fungi, and three groups of arthropods (myriapods, arachnids and hexapods) became fully terrestrialized. A significant evolutionary milestone during ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lledrod
Lledrod is a village and community in Ceredigion, Wales. The village is situated on the A485 road from Llanilar to Tregaron, where it crosses the valley of the River Wyre (Welsh: Afon Wyre). The parish is divided into Lledrod Isaf (Lower Lledrod) and Lledrod Uchaf (Upper Lledrod); Lledrod village is located in the former, Swyddffynnon village is situated in the latter. The name 'Lledrod' is a contraction of ''Llanfihangel-Lledrod'', which derives from ''Llanfihangel Llether-troed'', meaning 'the church of St Michael at the foot of the slope'. The community includes the small settlements of Tyncelyn and Blaenpennal. Geology The solid geology of the area comprises Silurian mudstone of the Borth Mudstone Formation, which are partially overlain by superficial deposits of glacial till ( Devensian diamicton). History Lledrod village The 'llan' element of Llanfihangel-Lledrod suggests that the parish church was established in the early medieval period. The nature of the settlement pri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ystwyth Fault , a village in Ceredigion, west Wales
{{disambig ...
Ystwyth may refer to: * River Ystwyth, a river in West Wales, which drains into Cardigan Bay at Aberystwyth * Ystwyth valley, a location in Wales drained by the River Ystwyth, known for its lead and silver mines and low life expectancy * Cwm Ystwyth Lead Mine, a disused lead mine in the valley of the River Ystwyth * Baron Ystwyth, an extinct title in the peerage of the United Kingdom * Ysbyty Ystwyth Ysbyty Ystwyth () is a small village and community in Ceredigion, Wales, southeast of Aberystwyth. Its church and the parish of the same name were the property of the Order of the Knights of the Hospital of St John of Jerusalem, hence the 'Ysby ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
