Island accessible by foot 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 visibleA tidal island is a raised area of land within a waterbody , which is connected to the larger mainland by a natural isthmus or man-made causeway that is exposed at low tide and submerged at high tide, causing the land to switch between being a promontory /peninsula and an island depending on tidal conditions.
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 the natural barrier created by the tidal channel .
List of tidal islands
Asia
Hong Kong
Iran
Japan
Taiwan
South Korea
Europe
Denmark
Denmark/Germany
France Mont Saint-Michel in Normandy
Germany
Guernsey
Iceland Grótta in Seltjarnarnes , the Capital Region
Ireland
Italy
Jersey
Spain
United Kingdom Rough Island opposite Rockcliffe, Dumfries & Galloway , ScotlandWorm'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 LondonGugh 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 , also known as Holy IslandMersea Island , Essex (accessible to road traffic via the Strood)Northey Island , EssexOsea Island , EssexPiel Island , CumbriaScolt Head Island , NorfolkSheep Island , Cumbria (joined at low tide to Piel Island and to Walney Island)St Mary's Island , North Tyneside St Michael's Mount , Cornwall White Island, Isles of Scilly and St Martin's, Isles of Scilly
Northern Ireland Gunns Island, connected to Ballyhornan Bay, Northern Ireland at low tide
Scotland Baleshare in the Outer Hebrides , joined to North Uist Bernera Island , joined to Lismore Brough of Birsay in Orkney , joined to Orkney Mainland Castle Stalker on Loch Laich in Argyll Cramond Island in the Firth of Forth Island Davaar near Campbeltown , off the Kintyre peninsulaEilean Donan in the western Highlands of Scotland Eilean Fladday and Eilean Tigh off the Isle of Raasay 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 BayIslands 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 Oronsay in Loch Bracadale , joined to SkyeOrosay in the Outer Hebrides , joined to Barra Rough Island opposite Rockcliffe, Dumfries & Galloway Vallay (Bhàlaigh), joined to North Uist in the Outer Hebrides
Wales 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 Francis Peninsula off of Sunshine Coast (British Columbia) , British Columbia , CanadaMicou's Island in St. Margarets Bay, Nova Scotia , CanadaMinister's Island in New Brunswick , CanadaRoss Island and Cheney Island in Grand Manan , New Brunswick , Canada Wedge Island , Nova Scotia , CanadaWhyte Islet in West Vancouver , British Columbia , Canada Bird Islet in Neck Point Park, Nanaimo, British Columbia, Canada
United States Bar Island in Maine , U.S.
Oceania
Australia
New Zealand Rangitoto Island forms a backdrop to a wave-cut platform off Achilles Point , Auckland, New Zealand.
See also
References ^ Peter Caton (2011). No Boat Required – Exploring Tidal Islands . Troubador Publishing Limited. ISBN 978-1848767-010 . ^ longpointisland.com Archived 2007-09-27 at the Wayback Machine
External links Media related to Tidal islands at Wikimedia Commons