Tidal 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.

List of tidal islands

Asia

Hong Kong

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

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

• 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

Ireland

• Coney Island near Rosses Point, County Sligo
• Omey Island in Connemara, County Galway, Connacht

Spain

• Cortegada Island in Pontevedra coast, Galicia.

United Kingdom

• Asparagus Island in Cornwall, England
• Baleshare in the Outer Hebrides, Scotland
• Brough of Birsay in Orkney, Scotland
• Burgh Island in Devon, England
• Burrow Island in Portsmouth Harbour, England
• Burry Holms on the Gower, Wales
• Castle Stalker on Loch Laich in Argyll, Scotland
• Chapel Island in Cumbria, England
• Chiswick Eyot in the River Thames
• Cramond Island in the Firth of Forth, Scotland
• Davaar Island near Campbeltown, on the Kintyre peninsula, Scotland
• Eilean Shona in Loch Moidart, Scotland
• Eilean Tioram, in Loch Moidart, Lochaber, Highland, Scotland on which is situated Castle Tioram
• Erraid off the Isle of Mull in Scotland
• Gateholm off the south west coast of Pembrokeshire, Wales
• Gugh in the Isles of Scilly, Great Britain
• Hestan Island near Rough Island, Scotland in Auchencairn Bay, Scotland
• Hilbre Island, Middle Eye and Little Eye in the River Dee estuary, between North Wales and the English Wirral
• Horsey Island in Essex, England
• Islands of Fleet: Ardwall Isle & Barlocco Isle in Galloway, Scotland
• Isle Ristol, the innermost of the Summer Isles in Scotland
• Lindisfarne in Northumberland, England
• Llanddwyn Island off Anglesey in North Wales
• Mersea Island in Essex, England
• Mumbles Lighthouse located in Mumbles, near Swansea
• Northey Island in Essex, England
• Oronsay in the Inner Hebrides, Scotland
• Osea Island in Essex, England
• Piel Island in Cumbria, England
• Ray Island in Essex, England
• Rough Island opposite Rockcliffe, Dumfries & Galloway, Scotland
• Sheep Island in Cumbria, England
• St Catherine's Island in Pembrokeshire, Wales
• St Mary's Island in North Tyneside, England
• St Michael's Mount in Cornwall, Great Britain
• Sully Island in the Vale of Glamorgan, Wales
• Ynys Gifftan in Gwynedd, north Wales
• Ynys Lochtyn on the coast of Cardigan Bay, Wales
• Worm's Head at the end of Gower, Wales

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

North America

Canada

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

United States

• 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

Australia

• 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

• 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

Coastal geography Landforms Anchialine pool Archipelago Atoll Avulsion Ayre Barrier island Bay Baymouth bar Bight Brackish marsh Cape Channel Cliff Cliff-top dune Cliffed coast Coast Coastal plain Coastal waterfall Continental margin Continental shelf Coral reef Cove Dune Estuary Firth Fjard Fjord Flat coast Freshwater marsh Fundus Gat Geo Graded shoreline Gulf Gut Headland Inlet Intertidal wetland Island Islet Isthmus Lagoon Machair Marine terrace Mega delta Mouth bar Mudflat Natural arch Peninsula Raised shoreline Reef Regressive delta Ria River delta Rocky shore Salt marsh Shoal Shore Sound Stack Steep coast Strait Strand plain Submarine canyon Tidal island Tidal marsh Tide pool Tied island Tombolo Windwatt more ... Beaches Beach cusps Beach evolution Beach morphodynamics Beach ridge Beachrock Modern recession of beaches Pocket beach Raised beach Shingle beach Storm beach Wash margin Processes Blowhole Coastal biogeomorphology Coastal erosion Concordant coastline Current Cuspate foreland Discordant coastline Emergent coastline Feeder bluff Fetch Headlands and bays Large-scale coastal behaviour Longshore drift Marine regression Marine transgression Rip current Sea cave Sea foam Shoal Spit Submergent coastline Surf break Surf zone Surge channel Swash Undertow Volcanic arc Wave-cut platform Wave shoaling Wind wave Wrack zone Management Accretion Coastal management Integrated coastal zone management Submersion Related Bulkhead line Coastline length Intertidal zone Littoral zone Grain size boulder cobble clay granule pebble sand shingle silt Physical oceanography Region of freshwater influence more ...