Tidal island

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Diagram of tidal island at low tide and high tide Tidal island diagram.svg
Diagram of tidal island at low tide and high tide
St Michael's Mount, Cornwall, at high tide, c. 1900 England-Saint-Michaels-Mount-1900-1.jpg
St Michael's Mount, Cornwall, at high tide, c. 1900
Cramond Island, Scotland, at high tide: the causeway is submerged, but the anti-boat pylons are still visible. Cramond Island and causeway from air.JPG
Cramond Island, Scotland, at high tide: the causeway is submerged, but the anti-boat pylons are still visible.

A tidal island is a piece of land that is connected to the mainland by a natural or man-made causeway that is exposed at low tide and submerged at high tide. Because of the mystique surrounding tidal islands many of them have been sites of religious worship, such as Mont Saint-Michel with its Benedictine Abbey. Tidal islands are also commonly the sites of fortresses because of their natural fortifications.

Causeway Route raised up on an embankment

A causeway is a track, road or railway on top of an embankment across "a low, or wet place, or piece of water". It can be constructed of earth, masonry, wood, or concrete. One of the earliest known wooden causeways is the Sweet Track in the Somerset Levels, England, that dates from the Neolithic age. Timber causeways may also be described as both boardwalks and bridges.

Tide The periodic change of sea levels caused by the gravitational and inertial effects of the Moon, the Sun and the rotation of the Earth

Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun, and the rotation of the Earth.

Place of worship specially designed structure or consecrated space for use in worshipping

A place of worship is a specially designed structure or consecrated space where individuals or a group of people such as a congregation come to perform acts of devotion, veneration, or religious study. A building constructed or used for this purpose is sometimes called a house of worship. Temples, churches, synagogues and mosques are examples of structures created for worship. A monastery, particularly for Buddhists, may serve both to house those belonging to religious orders and as a place of worship for visitors. Natural or topographical features may also serve as places of worship, and are considered holy or sacrosanct in some religions; the rituals associated with the Ganges river are an example in Hinduism.

Contents

List of tidal islands

Asia

Hong Kong

Ma Shi Chau A tidal island of Hong Kong

Ma Shi Chau (Chinese: 馬屎洲; Sidney Lau: Ma5Si2Jau1, literally "Horse Dung Island") is an island of Hong Kong, under the administration of Tai Po District. It is located in Tolo Harbour in the northeast New Territories (near Sam Mun Tsai). It is connected with another island, Yim Tin Tsai, by an isthmus traversable at low tide.

Tai Po District District in Hong Kong

Tai Po District is one of the 18 districts of Hong Kong. It covers the areas of Tai Po New Town, Lam Tsuen Valley and other surrounding area, and its exclave in the northern part of the Sai Kung Peninsula. The Tai Po proper and North Sai Kung, was divided by the Tolo Channel and Tolo Harbour. The District is located in the Eastern New Territories. The de facto administrative centre of the district is Tai Po New Town

New Territories Place

The New Territories is one of the three main regions of Hong Kong, alongside Hong Kong Island and the Kowloon Peninsula. It makes up 86.2% of Hong Kong's territory, and contains around half of the population of Hong Kong. Historically, it is the region described in the Convention for the Extension of Hong Kong Territory. According to that treaty, the territories comprise the mainland area north of the Boundary Street of Kowloon Peninsula and south of the Sham Chun River, as well as over 200 outlying islands, including Lantau Island, Lamma Island, Cheung Chau, and Peng Chau in the territory of Hong Kong.

Republic of China

Iran

Naaz islands Two tidal islands in the Persian gulf, on the shore of Qeshm island


The Naaz islands are two tidal islands in the Persian gulf, on the shore of Qeshm Island. At low tide, the intertidal zone of Qeshm connects the islands to the shore and at high tide the littoral zone is submerged and two hills become islands. Naaz islands are a tourist attractions of Qeshm Island and the south of Iran.

South Korea

Modo, Jindo island

Modo Island is a small island in Jindo County, South Jeolla province, South Korea, just off the southwest corner of the Korean peninsula. It is located to the south-east of Jindo Island and is about 1.1 km long and 300 meters wide.

South Korea Republic in East Asia

South Korea, officially the Republic of Korea (ROK), is a country in East Asia, constituting the southern part of the Korean Peninsula. The name Korea is derived from Goguryeo which was one of the great powers in East Asia during its time, ruling most of the Korean Peninsula, Manchuria, parts of the Russian Far East and Inner Mongolia under Gwanggaeto the Great. Its capital, Seoul, is a major global city and half of South Korea's 51 million people live in the Seoul Capital Area, the fourth largest metropolitan economy in the world.

Europe

Channel Islands

Denmark

Mandø Danish Wadden Sea island

Mandø is one of the Danish Wadden Sea islands off the southwest coast of Jutland, Denmark in the Wadden Sea, part of the North Sea. The island covers an area of 7.63 square kilometres and had 40 inhabitants in January 2018. The island is part of Esbjerg Municipality and is situated approximately 12 kilometres southwest of the ancient town of Ribe.

Vordingborg Place in Zealand, Denmark

Vordingborg is an old ferry town in Vordingborg Municipality in Denmark with around 18.000 inhabitants. Because of three large estates surrounding the town, a coherent urban development has not been possible, which is the reason why three satellite towns have emerged around the town. Within the ring of estates, the town has 12,000 inhabitants, and 18.043 inhabitants when including the three satellite towns of Ørslev, Nyråd and Stensved, situated 1, 3 and 5 kilometres, respectively, from the town of Vordingborg. Vordingborg Municipality (Kommune) has a population of 46,000.

Zealand Largest and most populous island in Denmark proper

Zealand, at 7,031 km2, is the largest and most populous island in Denmark proper. Zealand has a population of 2,302,074.

France

Mont Saint-Michel in Normandy Lun de Miel 443 (419901103).jpg
Mont Saint-Michel in Normandy

Île Madame is an island in the River Charente estuary on the Atlantic coast of France joined to the mainland by a causeway. The island has an area of four square miles and is unpopulated.

Charente-Maritime Department of France

Charente-Maritime is a department on the southwestern coast of France named after the Charente River.

Vendée Department of France

The Vendée is a department in the Pays-de-la-Loire region in west-central France, on the Atlantic Ocean. The name Vendée is taken from the Vendée river which runs through the southeastern part of the department.

Germany/Denmark

Ireland

Iceland

Grótta in Seltjarnarnes in Capital Region

Spain

United Kingdom

Rough Island opposite Rockcliffe, Dumfries & Galloway, Scotland Rough Island from Tornat Wood - geograph.org.uk - 1305616.jpg
Rough Island opposite Rockcliffe, Dumfries & Galloway, Scotland
Worm's Head at the end of Gower, Wales Worm's Head (Rhossili).jpg
Worm's Head at the end of Gower, Wales
England
Northern Ireland
Scotland
Wales

43 (unbridged) tidal islands can be walked to from the UK mainland. [1]

North America

Canada

United States

Bar Island in Maine, U.S. Bar island 1.JPG
Bar Island in Maine, U.S.

Nahant, MA

Australasia

Australia

New Zealand

Rangitoto Island forms a backdrop to a wave-cut platform off Achilles Point, Auckland, New Zealand. Rangitoto from Achilles Point.jpg
Rangitoto Island forms a backdrop to a wave-cut platform off Achilles Point, Auckland, New Zealand.

See also

Related Research Articles

Islands of the Clyde geographical object

The Islands of the Firth of Clyde are the fifth largest of the major Scottish island groups after the Inner and Outer Hebrides, Orkney and Shetland. They are situated in the Firth of Clyde between Ayrshire and Argyll and Bute. There are about forty islands and skerries, of which only four are inhabited and only nine larger than 40 hectares. The largest and most populous are Arran and Bute, and Great Cumbrae and Holy Isle are also served by dedicated ferry routes. Unlike the four larger Scottish archipelagos, none of the isles in this group are connected to one another or to the mainland by bridges.

Small Isles island group in Highland, Scotland

The Small Isles are a small archipelago of islands in the Inner Hebrides, off the west coast of Scotland. They lie south of Skye and north of Mull and Ardnamurchan – the most westerly point of mainland Scotland. The islands are not particularly small, but are named due to being within the civil parish of Small Isles. The Gaelic name of Na h-Eileanan Tarsainn translates as "cross isles" referring to the islands position between Morar and the Uists.

Outer Hebrides archipelago and council area off the west coast of mainland Scotland

The Outer Hebrides, also known as the Western Isles, Innse Gall or the Long Isle or the Long Island, is an island chain off the west coast of mainland Scotland. The islands are geographically coextensive with Comhairle nan Eilean Siar, one of the 32 unitary council areas of Scotland. They form part of the archipelago of the Hebrides, separated from the Scottish mainland and from the Inner Hebrides by the waters of the Minch, the Little Minch, and the Sea of the Hebrides. Scottish Gaelic is the predominant spoken language, although in a few areas English speakers form a majority.

Ramsey Island island in Pembrokeshire, Wales, United Kingdom

Ramsey Island is an island about 1 kilometre (0.62 mi) off St David's Head in Pembrokeshire on the northern side of St Brides Bay, in southwest Wales. It is 259 hectares in area. Ramsey means Hrafn's island.

The Skerries, Isle of Anglesey rock formation in Isle of Anglesey, United Kingdom

The Skerries are a group of sparsely vegetated rocky islets (skerries), with a total area of about 17 hectares lying 3 kilometres (1.9 mi) offshore from Carmel Head at the northwest corner of Anglesey, Wales. The islands are important as a breeding site for seabirds, and they attract divers, who come to visit the numerous shipwrecks. The Skerries Lighthouse sits atop the highest point in the islands.

Ynys Feurig is the name for a set of three small inter-connected low-lying inshore tidal rocky islets, lying off from the west coast of Anglesey, North Wales, just north of the village of Rhosneigr and south of RAF Valley airfield. They are also known by the English name Starvation Island. The islets are accessible from the mainland at mid-to low tide. The clipper Norman Court ran aground nearby, in Cymyran Bay.

There are many small islands in Scotland called Flodday or similar and this list provides a guide to their location. The derivation of the name is from the Old Norse floti meaning 'raft' or 'float'. The similar island names Fladda and Flotta are also from the Norse flatr and mean 'flat island'. Usage is not always consistent in external sources.

Ceallasaigh Mòr

Ceallasaigh Mòr is a low-lying island in Loch Maddy off North Uist in the Outer Hebrides of Scotland. This an area of shallow lagoons filled and drained by the tides each day. Ceallasaigh Beag lies to the south and these two islets are connected by a narrow strip of sand at low tide. Ceallasaigh Mòr may also join mainland North Uist near Bràigh Cheallasaigh at some stages of the tide.

Stromay A tidal island off North Uist in the Sound of Harris, Scotland

Stromay is a tidal island off North Uist in the Sound of Harris, Scotland.

Eileanan Chearabhaigh A group of small uninhabited tidal islands off the south east coast of Benbecula in the Outer Hebrides of Scotland

Eileanan Chearabhaigh is a collection of small uninhabited tidal islands off the south east coast of Benbecula in the Outer Hebrides of Scotland. The English language name Keiravagh Islands is sometimes used.

Ceallasaigh Beag

Ceallasaigh Beag is a low-lying island in Loch Maddy off North Uist in the Outer Hebrides of Scotland. This an area of shallow lagoons filled and drained by the tides each day. Ceallasaigh Mòr lies to the south and these two islets are connected by a narrow strip of sand during some low tides.

Monach Islands archipelago

The Monach Islands, also known as Heisker, are an island group west of North Uist in the Outer Hebrides of Scotland. The islands are not to be confused with Hyskeir in the Inner Hebrides, or Haskeir which is also off North Uist and visible from the group.

References

  1. Peter Caton (2011). No Boat Required – Exploring Tidal Islands. ISBN   978-1848767-010.
  2. longpointisland.com Archived 2007-09-27 at the Wayback Machine