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Sarn Gynfelyn
Sarn Gynfelyn (or Sarn Cynfelyn) is a shingle spit on the coast of Cardigan Bay, in the county of Ceredigion, Mid-Wales, in the United Kingdom. It is located at Wallog, a few kilometres north of Llangorwen, close to Clarach Bay, south of Borth and north of the town of Aberystwyth. It extends, albeit with a single break, for a distance of 11km from the coast to a reef known as Patches or Caerwyddno. Similar landform examples are found at several points along the Cardigan Bay coast, known as ''sarnau''. 'Sarn' (pluralised in Welsh as 'sarnau') is typically translated as 'causeway' or 'paved way'. These long banks which extend from the intertidal zone to the subtidal zone are thought to have originated as glacial moraines. In legend These protruding banks resemble man-made causeways and have long been part of the centuries-old legend of Cantre'r Gwaelod, a fabled sunken kingdom which was lost beneath the waters of Cardigan Bay. According to legend, Sarn Gynfelyn was one of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spit (landform)
A spit (cognate with the word for a rotisserie bar) or sandspit is a deposition (geology), deposition shoal, bar or beach landform off coasts or lake shores. It develops in places where re-entrance occurs, such as at a cove's headlands, by the process of longshore drift by longshore currents. The drift occurs due to waves meeting the beach at an oblique angle, moving sediment down the beach in a zigzag pattern. This is complemented by longshore currents, which further sediment transport, transport sediment through the water alongside the beach. These currents are caused by the same waves that cause the drift. Hydrology and geology Where the direction of the shore inland ''re-enters'', or changes direction, for example at a headland, the longshore current spreads out or dissipates. No longer able to carry the full load, much of the sediment is dropped. This is called deposition. This submerged bar of sediment allows longshore drift or littoral drift to continue to transport sed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moraine
A moraine is any accumulation of unconsolidated debris (regolith and Rock (geology), rock), sometimes referred to as glacial till, that occurs in both currently and formerly glaciated regions, and that has been previously carried along by a glacier or ice sheet. It may consist of partly rounded particles ranging in size from boulders (in which case it is often referred to as boulder clay) down to gravel and sand, in a groundmass of finely-divided clayey material sometimes called glacial flour. Lateral moraines are those formed at the side of the ice flow, and terminal moraines are those formed at the foot, marking the maximum advance of the glacier. Other types of moraine include ground moraines (till-covered areas forming sheets on flat or irregular topography) and medial moraines (moraines formed where two glaciers meet). Etymology The word ''moraine'' is borrowed from French language, French , which in turn is derived from the Savoyard dialect, Savoyard Italian ('mound of e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sarn Y Bwch
Sarn y Bwch, ( Welsh for 'buck's causeway'), is one of three parallel reefs extending beneath the sea into Cardigan Bay from the west coast of Wales. The causeway, probably a medial moraine, is made of glacial deposits left by receding ice sheets at the end of the last ice age. It is sometimes called ''Sarn y Bwlch'' ('the causeway of the pass'), but this form is later and less common than ''Sarn y Bwch''. Sarn y Bwch is the central one of the three, extending south-westwards from near Tywyn. To the north is the causeway of Sarn Badrig, whilst to the south is Sarn Gynfelyn, which extends from near Aberystwyth Aberystwyth (; ) is a University town, university and seaside town and a community (Wales), community in Ceredigion, Wales. It is the largest town in Ceredigion and from Aberaeron, the county's other administrative centre. In 2021, the popula .... External linksCantre'r Gwaelod (The Lowland Hundred) [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sarn Badrig
Sarn Badrig, also spelled ''Sarn Padrig'' ( Welsh for ' St. Patrick's causeway'), is one of several more or less parallel shingle reefs extending under the sea in Cardigan Bay on the west coast of Wales. The causeway is made of glacial deposits left by receding ice sheets at the end of the last ice age. Sarn Badrig is the longest and most northerly of these, and extends south-westwards under the sea from Mochras Point, near Harlech, parallel to the Llŷn Peninsula for a length of about 20 km, and can be seen at low tide. It is a hazard to shipping. A neighbouring causeway is that of Sarn y Bwch, which is close to Tywyn. Another example can be found at Sarn Gynfelyn, which is north of Aberystwyth. In Welsh legend it is one of the dykes which protected the drowned realm of Cantre'r Gwaelod , also known as or , is a legendary ancient sunken kingdom said to have occupied a tract of fertile land lying between Ramsey Island and Bardsey Island in what is now Cardigan Ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Low Tide
Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon (and to a much lesser extent, the Sun) and are also caused by the Earth and Moon orbiting one another. Tide tables can be used for any given locale to find the predicted times and amplitude (or "tidal range"). The predictions are influenced by many factors including the alignment of the Sun and Moon, the phase and amplitude of the tide (pattern of tides in the deep ocean), the amphidromic systems of the oceans, and the shape of the coastline and near-shore bathymetry (see ''Timing''). They are however only predictions, the actual time and height of the tide is affected by wind and atmospheric pressure. Many shorelines experience semi-diurnal tides—two nearly equal high and low tides each day. Other locations have a diurnal tide—one high and low tide each day. A "mixed tide"—two uneven magnitude tides a day—is a third regular category. Tides ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypoxia (environmental)
Hypoxia (''hypo'': 'below', ''oxia'': 'oxygenated') refers to low oxygen conditions. Hypoxia is problematic for air-breathing organisms, yet it is essential for many anaerobic organisms. Hypoxia applies to many situations, but usually refers to the atmosphere and natural waters. Atmospheric hypoxia Atmospheric hypoxia occurs naturally at high altitudes. Total atmospheric pressure decreases as altitude increases, causing a lower partial pressure of oxygen, which is defined as hypobaric hypoxia. Oxygen remains at 20.9% of the total gas mixture, differing from hypoxic hypoxia, where the percentage of oxygen in the air (or blood) is decreased. This is common in the sealed burrows of some subterranean animals, such as blesmols. Atmospheric hypoxia is also the basis of altitude training, which is a standard part of training for elite athletes. Several companies mimic hypoxia using normobaric artificial atmosphere. Aquatic hypoxia An aquatic system lacking dissolved oxygen (0% ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ynyslas
; ) is a small village about 1.5 miles north of Borth and 8 miles north of Aberystwyth, within the county of Ceredigion, Wales. It is sandwiched between a long sandy beach in Cardigan Bay and the beach in the Dyfi Estuary. The area between the sea and the estuary beach is made up of the Ynyslas Sand Dunes which are part of the Dyfi National Nature Reserve and home to many rare plants and animals. The sands of the estuary beach can be driven onto and parked upon. The nature reserve has a visitor centre with toilets and a small shop. At the start of some BBC1 programmes, it shows people flying kites on the sand dunes, this was filmed at Ynyslas. The northern end of the Ceredigion Coast Path extends to the Dyfi Estuary National Nature Reserve at Ynyslas. Ecology The Dyfi National Nature Reserve and the Ynyslas Sand Dunes are situated where the mouth of the Afon Leri joins the Dyfi Estuary at Ynyslas. Cors Fochno is situated to the east beyond the Afon Leri. At low tide th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neil Oliver
Neil Oliver (born 21 February 1967) is a Scottish television presenter, author, and conspiracy theorist. He has presented several documentary series on archaeology and history, including '' A History of Scotland'', ''Vikings'' and ''Coast''. He is also an author of popular history books and historical fiction. He was the president of the National Trust for Scotland from 2017 to 2020. Since 2021 Oliver has been a presenter for UK News channel GB News. Early life and education Oliver was born in Renfrew and raised in Ayr and Dumfries, where he attended Dumfries Academy and then the University of Glasgow. He obtained an MA (Hons) in archaeology and then worked as a freelance archaeologist before training as a journalist. Career Oliver first appeared on television in the 2002 BBC Two series '' Two Men in a Trench'', in which he and archaeologist Tony Pollard visited historic British battlefields. He was also a co-author of the two books accompanying the series. In 2006 he ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coast (TV Series)
''Coast'' is a BBC Television documentary, documentary series first broadcast on BBC Two television in 2005. It covers various subjects relating to both the natural and social history of the Coastline of the United Kingdom, British coastline and also more recently, that of Britain's near neighbours. The seventh series followed a different format from previous series. In 2016, reports from the show were repackaged as ''Coast: The Great Guide'' (known as ''Coast Great Guides'' when broadcast on BBC Four in 2021), an eight part series on BBC Two. The series is a collaboration between the Open University and BBC Productions, Birmingham. It is also known as the placeholder programme when BBC2 is under a fault in programming. In December 2013, the first reversion of the series format, ''Coast Australia'', was screened on History (Australian TV channel), The History Channel in Australia. Hosted by Neil Oliver, it was the second highest-rated show in the history of the channel. It starte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlantis
Atlantis () is a fictional island mentioned in Plato's works '' Timaeus'' and ''Critias'' as part of an allegory on the hubris of nations. In the story, Atlantis is described as a naval empire that ruled all Western parts of the known world, making it the literary counter-image of the Achaemenid Empire. After an ill-fated attempt to conquer "Ancient Athens," Atlantis falls out of favor with the deities and submerges into the Atlantic Ocean. Since Plato describes Athens as resembling his ideal state in the ''Republic'', the Atlantis story is meant to bear witness to the superiority of his concept of a state. Despite its minor importance in Plato's work, the Atlantis story has had a considerable impact on literature. The allegorical aspect of Atlantis was taken up in utopian works of several Renaissance writers, such as Francis Bacon's ''New Atlantis'' and Thomas More's ''Utopia''. On the other hand, nineteenth-century amateur scholars misinterpreted Plato's narrative as histo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deluge (mythology)
A flood myth or a deluge myth is a myth in which a great flood, usually sent by a deity or deities, destroys civilization, often in an act of divine retribution. Parallels are often drawn between the flood waters of these myths and the primeval cosmic ocean which appear in certain creation myths, as the flood waters are described as a measure for the cleansing of humanity, for example in preparation for rebirth. Most flood myths also contain a culture hero, who "represents the human craving for life". The oldest known narrative of a divinely inititated flood originates from the Sumerian culture in Mesopotamia, among others expressed in the Akkadian Athra-Hasis epic, which dates to the 18th century BCE. Comparable flood narratives appear in many other cultures, including the biblical Genesis flood narrative, ''manvantara-sandhya'' in Hinduism, Deucalion and Pyrrha in Greek mythology, also the Cheyenne, Blackfeet and Puebloan traditions. Mythologies The ''Epic of Gilgam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sunken Kingdom
Lost lands are islands or continents believed by some to have existed during prehistory, but to have since disappeared as a result of catastrophic geological phenomena. Legends of lost lands often originated as scholarly or scientific theories, only to be picked up by writers and individuals outside the academy. Occult and New Age writers have made use of lost lands, as have subaltern peoples. Phantom islands, as opposed to lost lands, are land masses formerly believed by cartographers to exist in the ''current'' historical age, but to have been discredited as a result of expanding geographic knowledge. The classification of lost lands as continents, islands, or other regions is in some cases subjective; for example, Atlantis is variously described as either a "lost island" or a "lost continent". Lost land theories may originate in mythology or philosophy, or in scholarly or scientific theories, such as catastrophic theories of geology. With the development of plate tecton ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
