Tidal island

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-submarine 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.

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

Mont Saint-Michel in Normandy

Germany/Denmark

The Halligen in the North Frisian Islands, Germany/Denmark
The Neuwerk in the Wadden Sea, Germany

Worm's Head at the end of Gower, Wales

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
Kili Holm in Orkney, 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
Worm's Head at the end of Gower, Wales
Ynys Gifftan in Gwynedd, north Wales
Ynys Lochtyn on the coast of Cardigan Bay, 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, 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

Australasia

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

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

References

Wikimedia Commons has media related to Tidal islands.

↑ Peter Caton (2011). No Boat Required – Exploring Tidal Islands. ISBN 978-1848767-010.
↑ longpointisland.com

Coastal geography

Landforms	Anchialine pool Archipelago Atoll Avulsion Ayre Barrier island Bay Baymouth bar Bight Bodden Brackish marsh Cape Channel Cliff Coast Coastal plain Coastal waterfall Continental margin Continental shelf Coral reef Cove Dune cliff-top Estuary Firth Fjard Fjord Freshwater marsh Fundus Gat Geo Gulf Gut Headland Inlet Intertidal wetland Island Islet Isthmus Lagoon Machair Marine terrace Mega delta Mouth bar Mudflat Natural arch Peninsula Reef Regressive delta Ria River delta Salt marsh Shoal Shore Skerry Sound Spit Stack Strait Strand plain Submarine canyon Tidal island Tidal marsh Tide pool Tied island Tombolo Windwatt

Beaches	Beach cusps Beach evolution Beach morphodynamics Beach ridge Beachrock Pocket beach Raised beach Recession Shell beach Shingle beach Storm beach Wash margin

Processes	Blowhole Cliffed coast Coastal biogeomorphology Coastal erosion Concordant coastline Current Cuspate foreland Discordant coastline Emergent coastline Feeder bluff Fetch Flat coast Graded shoreline Headlands and bays Ingression coast Large-scale coastal behaviour Longshore drift Marine regression Marine transgression Raised shoreline Rip current Rocky shore Sea cave Sea foam Shoal Steep coast 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 Grain size boulder clay cobble granule pebble sand shingle silt Intertidal zone Littoral zone Physical oceanography Region of freshwater influence

Category Commons

This article is issued from Wikipedia - version of the Sunday, April 03, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.