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{{T|francese|isole|novembre 2009}}
[[File:TanahLot03.jpg|thumb|[[Tanah Lot]] a [[Bali]]]]
Un''''isola tidale''', dall'inglese ''tide'', marea, è un'isola collegata al continente (o ad altra isola più grande) da un [[Tombolo_(spiaggia)|tombolo]], una banda sabbiosa che periodicamente viene ricoperta dalle acque durante l'[[marea|alta marea]], e come tale viene definito [[piano mesolitorale]].
È una situazione geologica di per sé instabile, che si crea proprio per tale natura. Ne deriva che frequentemente tale isole sono utilizzate per costruzioni particolari (fortezze, abbazie). Esempi famosi sono il [[Mont Saint Michel]] e la [[Penisola di Giens]] in [[Francia]], il [[Castello Aragonese (Ischia)|Castello Aragonese di Ischia]] in [[Italia]] e [[St Michael's Mount]] in [[Inghilterra]].
Sono pertanto isole accessibili soltanto nei periodi di bassa marea, tramite il loro tombolo sul quale viene spesso costruito un argine istmico, o diga, per facilitarne l'accesso, diga che viene interamente sommersa dall'alta marea, isolandole così del tutto.
==
=== États-Unis ===
* [[Bar Island]] ([[Maine (État)|Maine]])
=== France ===
[[Immagine:Fort national Saint-Malo.jpg|thumb|right|200px|Fort national de Saint-Malo à marée basse]]
[[Immagine:Saint-Malo island.jpg|thumb|right|200px|Fort national de Saint-Malo à marée haute]]
[[Immagine:Grand Bé vu d'Aleth.jpg|thumb|right|200px|Grand Bé à Saint-Malo à marée basse]]
*
* [[Île Callot|Callot]] ([[Carantec]], [[Finistère]])
* [[Île Carn]] (Finistère)
* [[Archipel des Ebihens|Ebihens]] ([[Côtes-d'Armor]])
* [[Fort Enet]] ([[Fouras]], [[Charente-Maritime]])
* [[Fort Louvois]] ([[Bourcefranc-le-Chapus]], Charente-Maritime)
* [[Grand Bé]] ([[Saint-Malo]], [[Ille-et-Vilaine]])
* [[Île Madame]] (Charente-Maritime)
* [[Île Milliau]] ([[Trébeurden]], Côtes-d'Armor)
* [[Le Mont-Saint-Michel|Mont-Saint-Michel]] ([[Manche (département)|Manche]])
* [[Île de Noirmoutier]] ([[Vendée (département)|Vendée]])
* [[Île Raguenès]] (Finistère)
* [[Îlot Saint-Michel (Côtes-d'Armor)|Îlot Saint-Michel]] (Côtes-d'Armor)
* [[Tatihou]] ([[Saint-Vaast-la-Hougue]], Manche)
* [[Tascon]] (golfe du Morbihan)
* [[Tombelaine]] (près du Mont-Saint-Michel)
* [[île de Nôle]] ([[Bourcefranc-le-Chapus]], Charente-Maritime)
* [[Fort Bloqué]] ([[Ploemeur]], Morbihan)
===Îles anglo-normandes===
* [[L'Islet (Jersey)|L'Islet]], emplacement du [[château Élisabeth]] à [[Jersey]]
* [[Lihou]] (reliée à [[Guernesey]])
* Fort de [[Saint-Aubin (Jersey)|Saint-Aubin]], à Jersey
=== Inde ===
* Mausolée Haji Ali à [[Mumbai]]
=== Indonésie ===
* Temple de [[Tanah Lot]], à [[Bali]]
=== Irlande ===
* L'[[île d'Omey]], [[Connemara]]
=== Royaume-Uni ===
[[Immagine:England-Saint-Michaels-Mount-1900-1.jpg|thumb|right|250px|St Michael's Mount à marée haute vers 1900]]
* [[Baleshare]] ([[Orcades]], reliée à [[North Uist]] par une chaussée)
* [[Brough of Birsay]] (Orcades, reliée à [[West Mainland]])
* [[Burgh Island]], [[Comté de Devon|Devon]], [[Angleterre]]
* [[Cramond (Écosse)|Cramond]], [[Édimbourg]], [[Écosse]]
* [[Lindisfarne]], [[Northumberland (comté anglais)|Northumberland]], Angleterre
* [[Île de Northey|Northey]], [[Essex (comté anglais)|Essex]]
* [[Île d'Osea|Osea]], Essex
* [[Oronsey]], [[Hébrides intérieures]] (reliée à [[Colonsay]])
* [[St Michael's Mount]], [[Penwith]], [[Cornouailles]], Angleterre
== Voir aussi ==
* [[Île]]
* [[Marée]]
* [[Estran]]
{{portale|geografia|Isole}}
[[Catégorie:Île accessible à marée basse|*]]
== Altri progetti ==
{{interprogetto|commons=Category:Tidal islands}}
[[de:Gezeiteninsel]]
[[en:Tidal island]]
[[fy:Tij-eilân]]
[[pl:Wyspa pływowa]]
[[Immagine:England-Saint-Michaels-Mount-1900-1.jpg|thumb|250px|[[St Michael's Mount]], [[Cornwall]] at [[high tide]] in 1900.]]
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 [[place of worship|religious worship]], such as [[Mont Saint Michel]] with its [[Order of Saint Benedict|Benedictine]] [[Abbey]]. Tidal islands are also commonly the sites of [[fortresses]], due to their natural fortifications.
The former [[Bennelong Point, New South Wales|Bennelong Island]] in [[Sydney]], [[Australia]] was developed into [[Bennelong Point]] and is now the ___location of the [[Sydney Opera House]].
== Tidal Islands of the World ==
{{Expand|date=March 2008}}
===Canada===
*[[Minister's Island]] in [[New Brunswick]], [[Canada]]
=== Francia ===
*[[Mont Saint Michel]] in [[Normandia]],
*[[Île de Noirmoutier]] in [[Vendée]], [[France]]
===Germany/Denmark===
* The [[Halligen]] in the [[North Frisian Islands]], [[Germany]]/[[Denmark]]
===Guernsey===
*[[Lihou]] in [[Guernsey]], one of the [[Channel Islands]]
===Ireland===
* [[Omey Island]] in [[Connemara]], [[County Galway]], [[Connacht]]
===United Kingdom===
*[[Baleshare]] in the [[Outer Hebrides]], [[Scotland]]
*[[Brough of Birsay]] in [[Orkney]], Scotland
*[[Burgh Island]] in [[Devon]], [[England]]
*[[Chapel Island]] in [[Cumbria]], England
*[[Cramond Island]], [[Edinburgh]], Scotland
*[[Davaar Island]] near [[Campbeltown]], on the [[Kintyre]] peninsula, Scotland
*[[Gugh]] in the [[Isles of Scilly]], [[Great Britain]]
*[[Hilbre Island]] in the [[River Dee]] [[estuary]], between [[North Wales]] and the English [[Wirral Peninsula|Wirral]]
*[[Llanddwyn Island]] off [[Anglesey]] in [[North Wales]]
*[[Lindisfarne]] in [[Northumberland]], England
*[[Northey Island]] in [[Essex]], England
*[[Oronsay, Inner Hebrides|Oronsay]] in the [[Inner Hebrides]], Scotland
*[[Osea Island]] in Essex, England
*[[Rough Island, Scotland|Rough Island]] opposite [[Rockcliffe, Dumfries & Galloway]], Scotland
*[[Sheep Island (England)|Sheep Island]] in [[Cumbria]], England
*[[St Michael's Mount]] in [[Penwith]], [[Cornwall]], Great Britain
*[[St Mary's Lighthouse]] in [[North Tyneside]], England
*[[Sully Island]] in the [[Vale of Glamorgan]], [[Wales]]
*[[Worm's Head]] at the end of [[Gower]], Wales
===USA===
*[[Bar Island]] in [[Maine]], [[U.S.A.]]
*[[High Island, New York]]
*[http://www.longpointisland.com Long Point Island], [[Harpswell, Maine]], [[U.S.A.]]
*[[Cana Island Lighthouse]] in [[Wisconsin]], [[U.S.A.]]
*[[Battery Point Light]] in [[California]], [[U.S.A.]]
==See also==
*[[Island]]
*[[Islet]]
[[Categoria:Islands]]
[[Categoria:Tides]]
[[Categoria:Tidal islands| ]]
{{geo-term-stub}}
{{portale|isole}}
[[Categoria:Isole tidali| ]]
[[de:Gezeiteninsel]]
[[en:Tidal island]]
[[es:Isla mareal]]
[[eu:Itsasgorako uharte]]
[[fr:Île accessible à marée basse]]
[[fy:Tij-eilân]]
[[gv:Ellan tidee]]
[[nn:Tidvassøy]]
[[pl:Wyspa pływowa]]
[[br:Ledenez]]
[[en:Presque-isle]]
[[wo:Daanaka-dun]]
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