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Sarn Gynfelyn
Sarn Gynfelyn 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. Similar landform examples are found at several points along the Cardigan Bay coast, known as ''sarnau''. These long subtidal banks 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 the causeways leading to the lost land. The legend of Cantre'r Gwaelod is comparable to the deluge myth found in nearly every ancient culture, and it has been likened to the story of Atlantis. In a 2006 episode of the BBC television documentary ''Coast'', presenter Neil Oliver visited ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spit (landform)
A spit or sandspit is a deposition 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 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 sediment in the direction the waves are breaking, forming an above-water spit. Without the co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Low Tide At Sarn Gynfelyn - Geograph
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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 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 and seaside town as well as a community in Ceredigion, Wales. Located in the historic county of Cardiganshire, means "the mouth of the Ystwyth". Aberystwyth University has been a major educational location in .... 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 ( en, The Lowland Hundred), is a legendary ancient sunken kingdom said to have occupied a tract of fertile land lying between Ramsey Island and Bardsey Island in ... [...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 va ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypoxia (environmental)
Hypoxia refers to low oxygen conditions. Normally, 20.9% of the gas in the atmosphere is oxygen. The partial pressure of oxygen in the atmosphere is 20.9% of the total barometric pressure. In water, oxygen levels are much lower, approximately 7 ppm or 0.0007% in good quality water, and fluctuate locally depending on the presence of photosynthetic organisms and relative distance to the surface (if there is more oxygen in the air, it will diffuse across the partial pressure gradient). 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 tra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ynyslas
Ynyslas (, meaning "Blue Island") is a small Welsh village about 1.5 miles north of Borth and 8 miles north of Aberystwyth, within the county of Ceredigion. 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 BBC 1 programmes, the idents show people flying kites on sand dunes, and 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neil Oliver
Neil Oliver (born 21 February 1967) is a British television presenter, archaeologist, historian and author. 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. 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. Television 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 presented ''The Face of Britain'' for Channel 4 and ''Scotl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coast (TV Series)
''Coast'' is a BBC documentary series first broadcast on BBC Two television in 2005. It covers various subjects relating to both the natural and social history of the 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 The History Channel in Australia. Hosted by Neil Oliver, it was the second highest-rated show in the history of the channel. It started airing on BBC Two from 14 May 2014; series 2 was aired in 2015. ''Coast New Zealand'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlantis
Atlantis ( grc, Ἀτλαντὶς νῆσος, , island of Atlas (mythology), Atlas) is a fictional island mentioned in an allegory on the hubris of nations in Plato's works ''Timaeus (dialogue), Timaeus'' and ''Critias (dialogue), Critias'', wherein it represents the antagonist naval power that besieges "Ancient Athens", the Counterfactual history, pseudo-historic embodiment of Plato's ideal state in ''The Republic (Plato), The Republic''. In the story, Athens repels the Atlantean attack unlike any other nation of the Ecumene, known world, supposedly bearing witness to the superiority of Plato's concept of a state. The story concludes with Atlantis falling out of favor with the deities and submerging into the Atlantic Ocean. 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 Th ... [...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 primaeval waters which appear in certain creation myths, as the flood waters are described as a measure for the cleansing of humanity, in preparation for rebirth. Most flood myths also contain a culture hero, who "represents the human craving for life". The flood-myth motif occurs in many cultures, including the Mesopotamian flood stories, Native American in North America, the Genesis flood narrative, ''manvantara-sandhya'' in Hinduism, and Deucalion and Pyrrha in Greek mythology. Mythologies One example of a flood myth is the ''Epic of Gilgamesh''. Many scholars believe that this account was copied from the Akkadian '' Atra-Hasis'', which dates to the 18th century BCE. In the Gilgamesh flood myth, the highest god, Enlil, decides ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sunken Kingdom
Lost lands are islands or continents believed by some to have existed during pre-history, 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 such as the Tamils in India. 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
