Tidal island




Land which is connected to the mainland by a causeway which is covered by high tide and exposed at low tide



Diagram of tidal island at low tide and high tide





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.


"Tide island" redirects here. It is not to be confused with Tied island.

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.




Contents






  • 1 List of tidal islands


    • 1.1 Asia


      • 1.1.1 Hong Kong


      • 1.1.2 Republic of China


      • 1.1.3 Iran


      • 1.1.4 South Korea




    • 1.2 Europe


      • 1.2.1 Channel Islands


      • 1.2.2 Denmark


      • 1.2.3 France


      • 1.2.4 Germany/Denmark


      • 1.2.5 Ireland


      • 1.2.6 Iceland


      • 1.2.7 Spain


      • 1.2.8 United Kingdom


        • 1.2.8.1 England


        • 1.2.8.2 Northern Ireland


        • 1.2.8.3 Scotland


        • 1.2.8.4 Wales






    • 1.3 North America


      • 1.3.1 Canada


      • 1.3.2 United States




    • 1.4 Australasia


      • 1.4.1 Australia


      • 1.4.2 New Zealand






  • 2 See also


  • 3 References


  • 4 External links





List of tidal islands



Asia



Hong Kong



  • Ma Shi Chau in Tai Po District, northeastern New Territories, within the Tolo Harbour


Republic of China



  • Jiangong Islet in Kinmen


Iran



  • Naaz islands in Persian gulf, southern seashore of Qeshm island


South Korea



  • Jindo Island and Modo Island in southwest South Korea


Europe



Channel Islands



  • Lihou in Guernsey, one of the Channel Islands


Denmark




  • Mandø Island – on Denmark's western coast


  • Knudshoved Island – north of Vordingborg on southern Zealand, Denmark



France





Mont Saint-Michel in Normandy




  • Île Madame in Charente-Maritime


  • Île de Noirmoutier in Vendée


  • Mont Saint-Michel in Normandy


  • Tombelaine in Normandy



Germany/Denmark



  • The Halligen in the North Frisian Islands, Germany/Denmark

  • The Neuwerk in the Wadden Sea, Germany



Ireland




  • Coney Island near Rosses Point, County Sligo


  • Omey Island in Connemara, County Galway, Connacht


  • Inishkeel, County Galway, Connacht



Iceland


Grótta in Seltjarnarnes in Capital Region



Spain




  • Cortegada Island in Pontevedra coast, Galicia.

  • San Nikolas Island in Lekeitio, Bizkaia



United Kingdom





Rough Island opposite Rockcliffe, Dumfries & Galloway, Scotland





Worm's Head at the end of Gower, Wales



England



  • Asparagus Island, Mount's Bay, Cornwall


  • Burgh Island, Devon


  • Burrow Island, Portsmouth Harbour


  • Chapel Island, Cumbria


  • Chiswick Eyot in the River Thames in London


  • Gugh in the Isles of Scilly (joined to St Agnes at low tide)


  • Hilbre Island, Middle Eye and Little Eye in the River Dee estuary, between North Wales and the English Wirral, but administratively in England.


  • Horsey Island, Essex


  • Lindisfarne, Northumberland


  • Mersea Island, Essex (accessible to road traffic via the Strood)


  • Northey Island, Essex


  • Osea Island, Essex


  • Piel Island, Cumbria


  • Sheep Island, Cumbria (joined at low tide to Piel Island and to Walney Island)


  • St Mary's Island, North Tyneside


  • St Michael's Mount, Cornwall



Northern Ireland


  • Nendrum Monastery on Mahee Island, Strangford Lough


Scotland



  • Baleshare in the Outer Hebrides, joined to North Uist


  • Brough of Birsay in Orkney, joined to Orkney Mainland


  • Castle Stalker on Loch Laich in Argyll


  • Cramond Island in the Firth of Forth


  • Davaar Island near Campbeltown, off the Kintyre peninsula


  • Eilean Shona in Loch Moidart, Lochaber, Highland


  • Eilean Tioram, in Loch Moidart


  • Erraid off the Isle of Mull


  • Hestan Island near Rough Island in Auchencairn Bay


  • Islands of Fleet: Ardwall Isle and Barlocco Isle in Galloway


  • Isle Ristol, the innermost of the Summer Isles


  • Kili Holm in Orkney, joined to Egilsay


  • Oronsay in the Inner Hebrides, joined to Colonsay


  • Rough Island opposite Rockcliffe, Dumfries & Galloway


  • Vallay (Bhàlaigh), joined to North Uist, Outer Hebrides



Wales



  • Burry Holms off the Gower


  • Cribinau off Anglesey


  • Gateholm off the south west coast of Pembrokeshire


  • Ynys Llanddwyn off Anglesey


  • Mumbles Lighthouse located in Mumbles, near Swansea


  • St Catherine's Island in Pembrokeshire


  • Sully Island in the Vale of Glamorgan


  • Worm's Head at the end of the Gower


  • Ynys Cantwr off Ramsey Island, Pembrokeshire


  • Ynys Feurig off Anglesey


  • Ynys Gifftan in Gwynedd, north Wales


  • Ynys Gwelltog off Ramsey Island, Pembrokeshire


  • Ynys Lochtyn on the coast of Cardigan Bay


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



North America



Canada



  • Finisterre Island off of Bowen Island, British Columbia, Canada


  • Micou's Island in St. Margarets Bay, Nova Scotia, Canada


  • Minister's Island in New Brunswick, Canada

  • Ross Island and Cheney Island in Grand Manan, New Brunswick, Canada


  • Wedge Island, Nova Scotia, Canada

  • Whyte Islet in West Vancouver, British Columbia, Canada



United States





Bar Island in Maine, U.S.




  • Bar Island in Maine


  • Battery Point Light in California


  • Bumpkin Island in Massachusetts


  • Camano Island in Puget Sound of Washington State, since earth filled


  • Cana Island Lighthouse in Wisconsin


  • Charles Island, in Connecticut


  • Douglas Island in Alaska

  • High Island, New York

  • Long Point Island,[2]Harpswell, Maine


Nahant, MA



Australasia



Australia



  • The Point Walter Sandbar in Perth, Western Australia has slowly formed into a tidal island and is only connected to the mainland in extreme low tides.


  • Penguin Island (Western Australia) in the Shoalwater Islands Marine Park

  • Former tidal island Bennelong Island in Sydney, Australia was developed into Bennelong Point and is now the location of the Sydney Opera House.



New Zealand





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




  • Matakana Island in Tauranga Harbour


  • Opahekeheke Island in the Kaipara Harbour

  • Puddingstone Island in Otago Harbour


  • Rabbit Island, Bells Island, and Bests Island in Tasman Bay

  • The Hauraki Gulf islands of Motutapu Island and Rangitoto Island are connected at low tide

  • The Okatakata Islands and Walker Island in Rangaunu Harbour



See also




  • Island

  • Islet

  • Tied island

  • Vanishing island



References





  1. ^ Peter Caton (2011). No Boat Required – Exploring Tidal Islands. ISBN 978-1848767-010..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:"""""""'""'"}.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}


  2. ^ longpointisland.com Archived 2007-09-27 at the Wayback Machine




External links



  • Media related to Tidal islands at Wikimedia Commons









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