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Sandbar between St. Agnes, Isles of Scilly and Gugh in Cornwall

A tidal sandbar connecting the islands of Waya and Wayasewa of the Yasawa Islands, Fiji

A shoal is a somewhat linear landform within or extending into a body of water, typically composed of sand, silt or small pebbles. Alternatively termed sandbar or sandbank, a bar is characteristically long and narrow (linear) and develops where a stream or ocean current promote deposition of granular material, resulting in localized shallowing (shoaling) of the water. Bars can appear in the sea, in a lake, or in a river. Alternatively a bar may separate a lake from the sea, as in the case of an ayre. They are typically composed of sand, although could be of any granular matter that the moving water has access to and is capable of shifting around (for example, soil, silt, gravel, cobble, shingle, or even boulders). The grain size of the material comprising a bar is related to the size of the waves or the strength of the currents moving the material, but the availability of material to be worked by waves and currents is also important. Look up shoal in Wiktionary, the free dictionary. ... Image File history File links Emblem-important. ... Image File history File links Metadata Size of this preview: 800 × 600 pixelsFull resolution (2304 × 1728 pixel, file size: 2. ... Image File history File links Metadata Size of this preview: 800 × 600 pixelsFull resolution (2304 × 1728 pixel, file size: 2. ... For other uses, see Saint Agnes (disambiguation). ... Gugh is an island in the Isles of Scilly, United Kingdom. ... For other uses, see Cornwall (disambiguation). ... Image File history File links Size of this preview: 396 × 599 pixelsFull resolution‎ (1,153 × 1,745 pixels, file size: 470 KB, MIME type: image/jpeg) File historyClick on a date/time to view the file as it appeared at that time. ... Image File history File links Size of this preview: 396 × 599 pixelsFull resolution‎ (1,153 × 1,745 pixels, file size: 470 KB, MIME type: image/jpeg) File historyClick on a date/time to view the file as it appeared at that time. ... The Yasawa Group is a group of about 20 volcanic islands in the Western Division of Fiji, with an approximate total area of 135km2. ... For other uses, see Linear (disambiguation). ... A landform comprises a geomorphological unit, and is largely defined by its surface form and location in the landscape, as part of the terrain, and as such, is typically an element of topography. ... Impact from a water drop causes an upward rebound jet surrounded by circular capillary waves. ... For other uses, see Sand (disambiguation). ... For other uses, see Silt (disambiguation). ... Sea wave polishing pebbles into rounded corners Pebbles For other uses, see Pebble (disambiguation). ... Ocean currents (1911) Ocean currents (1943) An ocean current is any more or less continuous, directed movement of ocean water that flows in one of the Earths oceans. ... It has been suggested that this article or section be merged into sediment. ... A granular material is a conglomeration of discrete solid, macroscopic particles characterized by a loss of energy whenever the particles interact (the most common example would be friction when grains collide). ... This article is about the body of water. ... For other uses, see Lake (disambiguation). ... For other uses, see River (disambiguation). ... An ayre is a body of water positioned very near to the ocean and divided from the sea by a narrow bar of land. ... For other uses, see Sand (disambiguation). ... Loess field in Germany Surface-water-gley developed in glacial till, Northern Ireland For the American hard rock band, see SOiL. For the System of a Down song, see Soil (song). ... For other uses, see Silt (disambiguation). ... Gravel (largest fragment in this photo is about 4 cm) Gravel is rock that is of a certain particle size range. ... Cobble is a geologic term for a rock or rock fragment with a grain size with dimensions between 64–256 mm (2. ... A shingle beach is a beach which is armoured with pebbles or small to medium sized cobbles. ... This article is about the large rocks. ... Particle size, also called grain size, refers to the diameter of individual grains of sediment, or the lithified particles in clastic rocks. ...

The term bar can apply to landform features spanning a considerable range in size, from a length of a few meters in a small stream to marine depositions stretching for hundreds of kilometres along a coastline, often called barrier islands. A landform comprises a geomorphological unit, and is largely defined by its surface form and location in the landscape, as part of the terrain, and as such, is typically an element of topography. ... “km” redirects here. ...

In a nautical sense, a bar is a shoal, similar to a reef: a shallow formation of (usually) sand that is a navigation or grounding hazard. It therefore applies to a silt accumulation that shallows the entrance to or the course of a river or creek. This article is in need of attention. ... A sandbank is a patch of sand in water, which creates a shallow area which may pose a hazard to boats. ... For other uses, see Reef (disambiguation). ... Table of geography, hydrography, and navigation, from the 1728 Cyclopaedia. ... There are several meanings of the term Grounding: Grounding is also used to describe the connection of part of an electrical circuit to an electrical ground. ... For other uses, see Silt (disambiguation). ... For other uses, see River (disambiguation). ... Butchers Creek, Omeo, Victoria A stream, brook, beck, burn or creek, is a body of water with a detectable current, confined within a bed and banks. ...

Sandbars and longshore bars

A sandbar off of Suffolk County, Long Island, New York, August 2006.

Shoals in the Mississippi River at Arkansas and Mississippi.

Bars that occur at or off the shoreline of a sea or a lake are related to beaches and might be considered offshore features of a beach (Bascom, 1980). At times when larger waves attack the beach berm, some of the beach material is redistributed offshore to become a longshore bar or sandbar, possibly visible at low tide. This bar forms (sometimes seaward of a trough) where the waves are breaking, because the breaking waves set up a shoreward current with a compensating counter-current along the bottom. Sand carried by the offshore moving bottom current is deposited where the current reaches the wave break (Bascom, 1980). Other longshore bars may lie further offshore, representing the break point of even larger waves, or the break point at low tide. Image File history File links Metadata Size of this preview: 800 × 419 pixelsFull resolution‎ (1,544 × 809 pixels, file size: 272 KB, MIME type: image/jpeg) The author of this photo is me, David Shankbone. ... Image File history File links Metadata Size of this preview: 800 × 419 pixelsFull resolution‎ (1,544 × 809 pixels, file size: 272 KB, MIME type: image/jpeg) The author of this photo is me, David Shankbone. ... Suffolk County is a county located in the U.S. state of New York. ... This article is about the island in New York State. ... This article is about the state. ... Image File history File links Download high resolution version (860x539, 313 KB) Summary I took this. ... Image File history File links Download high resolution version (860x539, 313 KB) Summary I took this. ... For the river in Canada, see Mississippi River (Ontario). ... This article is about the U.S. State. ... This article is about the U.S. state. ... For other uses, see Beach (disambiguation). ... Look up Berm in Wiktionary, the free dictionary. ... This article is about tides in the Earths oceans. ... In geology, a trough generally referrs to a depression that extends laterally over a distence, while being less steep than a trench. ...

Shoals as geological units

In addition to longshore bars discussed above that are relatively small features of a beach, the term shoal can be applied to larger geological units that form off a coastline as part of the process of coastal erosion. These include spits and baymouth bars that form across the front of embayments and rias. A tombolo is a bar that forms an isthmus between an island or offshore rock and a mainland shore. For other uses, see Beach (disambiguation). ... A spit is a deposition landform found off coasts. ... Georges River, in the southern suburbs of Sydney (Australia) is a ria, or drowned river valley. ... Tombolo at Stockton Island, Ashland County (Wisconsin). ... For other uses, see Isthmus (disambiguation). ... This article is about the geomorphological/geopolitical term; MAINLAND is also a cheese brand owned by Fonterra, a New Zealand dairy company. ...

The largest of the geological units of this kind is a barrier island, such as occur along the East Coast of the United States, along the Gulf coast, along the southern coast of Belize and many other locations worldwide. Regional definitions vary from source to source. ... Gulf of Mexico in 3D perspective. ...

In places of re-entrance along a coastline (such as inlets, coves, rias, and bays), sediments carried by a longshore current will fall out where the current dissipates, forming a spit. An area of water isolated behind a large bar is called a lagoon. Over time, lagoons may silt up, becoming salt marshes. Lulworth Cove in Dorset, England (Great Britain) A fjord (Lysefjorden) in Norway An inlet is a body of water, usually seawater, which has characteristics of one or more of the following: a bay a cove an estuary a firth a fjord a geo a sea loch a sea lough a... Lulworth Cove, Dorset England This article is about the coastal feature. ... Longshore drift (sometimes known as shore drift, LSD or littoral drift) is a geological process by which sediments such as sand or other materials, move along a beach shore. ... A spit is a deposition landform found off coasts. ... This mid bay barrier in Narrabeen, a suburb of Sydney (Australia), has blocked what used to be a bay to form a lagoon. ... An Atlantic coastal salt marsh in Connecticut. ...

In some cases shoals may be precursors to beach expansion and dunes formation, providing a source of windblown sediment to augment such beach or dunes landforms.^[1]

Federal Laws

• Coastal Barrier Resources Act of 1982

Coastal Barrier Resources Act, enacted October 18, 1982, designated various undeveloped coastal barrier islands, depicted by specific maps, for inclusion in the Coastal Barrier Resources System. ...

Examples

This article or section may contain original research or unverified claims. Please improve the article by adding references. See the talk page for details. (October 2007)

• Abidjan, Côte d'Ivoire
• Amelia Island, Florida, United States
• Ap Lei Chau - Ap Lei Pai, Hong Kong
• Barnegat Bay, New Jersey, United States
• Beecher Island, Colorado, United States
• Brigantine, New Jersey, United States
• Cape Canaveral, Florida, United States
• Cape St. Paul, Ghana
• Cheung Chau, Hong Kong
• Cumberland Island, Georgia, United States
• Dauphin Island, Alabama, United States
• Ediz Hook, Port Angeles, Washington, United States
• Fort George Island' Florida, United States
• Galveston Island, Texas, United States
• Grand Isle, Louisiana, United States
• Great Yarmouth, England
• Hel Peninsula, Poland
• Hilton Head Island, South Carolina, United States
• Lung Kwu Chau, Hong Kong
• Loe Bar, Cornwall, England
• Long Island, New York, United States
• Long Point, Ontario, Canada
• Longboat Key, Florida, United States
• Macao Isthmus, Macao
• Miami Beach, Florida, United States
• Minnesota Point, Duluth, Minnesota, United States
• Ninety Mile Beach, Victoria, Australia
• Ocean City, Maryland, United States
• Outer Banks, North Carolina, United States
• Padre Island, Texas, United States
• Port Said, Egypt
• Ponte Vedra Beach,Florida, United States
• Pui O, Hong Kong
• Qijin Island, Kaohsiung, Taiwan
• Sable Island, Nova Scotia, Canada
• Santa Rosa Island, FL, Florida, United States
• Sandbar Resort, Boquete Island, Puerto Galera, Mindoro, Philippines
• Sha Chau, Hong Kong
• Shek O Headland - Tai Tau Chau, Hong Kong
• Ship Island, Mississippi, United States
• Sriharikota, Andhra Pradesh, India
• Stinson Beach, California, USA
• Talbot Island, Big, Florida, United States
• Talbot Island, Little, Florida, Unites States
• The Coorong, South Australia, Australia
• Twin Lakes, California, United States
• Wadden islands, also known as West Frisian Islands, along the Dutch, German, and Danish coasts. The largest group of barrier islands on Earth.
• Winona, Minnesota, United States
• Yim Tin Tsai - Ma Shi Chau, Hong Kong
• Zingst Peninsula, Germany

Image File history File links Emblem-important. ... Freeway along the Ébrié Lagoon near the Plateau, Abidjans business district and centre of the city. ... Amelia Island is the southernmost of the Sea Islands, a chain of barrier islands stretching from North Carolina to Florida. ... This article is about the U.S. State of Florida. ... Ap Lei Chau (鴨脷洲), or Aberdeen Island, is an island of Hong Kong, located south-west of Hong Kong Island, next to Aberdeen Harbour and Aberdeen Channel, with an area of 1. ... Ap Lei Pai (鴨脷排) is an island linked to the south of Ap Lei Chau in Hong Kong. ... Barnegat Bay is a small brackish arm of the Atlantic Ocean, approximately 30 mi (50 km) long along the coast of Ocean County, New Jersey in the United States. ... This article is about the U.S. state. ... Beecher Island in 1917: the south channel of the Arickaree River has been closed, owing to the sifting sands of the stream. ... Official language(s) English Capital Denver Largest city Denver Largest metro area Denver-Aurora Metro Area Area  Ranked 8th  - Total 104,185 sq mi (269,837 km²)  - Width 280 miles (451 km)  - Length 380 miles (612 km)  - % water 0. ... Brigantine is a city located in Atlantic County, New Jersey. ... This article is about the area of Florida. ... This article is about the U.S. State of Florida. ... A street on Cheung Chau Cheung Chau (Chinese: , Pinyin: Changzhou; lit. ... Cumberland Island is one of the Sea Islands. ... Dauphin Island is a barrier island on the western edge of Mobile Bay. ... This article is about the U.S. State. ... Early morning photograph from the pier tower Port Angeles is a city in Clallam County, Washington, United States. ... Fort George Island State Cultural Site is a Florida State Park located on Fort George Island, about three miles south of Little Talbot Island State Park on SR A1A, and near the 46,000 acre Timucuan Ecological and Historic Preserve. ... This article is about the U.S. State of Florida. ... A map of Galveston Island, a barrier island on the Texas Gulf coast in the United States Galveston Island is a barrier island on the Texas Gulf coast in the United States, about 50 miles (80 kilometers) south of Houston. ... For other uses, see Texas (disambiguation). ... Grand Isle is a town located in Jefferson Parish, Louisiana, on an island of the same name at the mouth of Barataria Bay where it meets the Gulf of Mexico. ... This article is about the U.S. State. ... Great Yarmouth, often known to locals simply as Yarmouth, is an English coastal town in the county of Norfolk. ... For other uses, see England (disambiguation). ... Hel Peninsula as seen from Landsat satellite in 2000 Kitesurfing, Hel Peninsula Hel Peninsula (Polish Mierzeja Helska, Kashubian Hélskô Sztremlëzna, German Halbinsel Hela) is a 35-km-long sand bar peninsula in northern Poland separating the Bay of Puck from the open Baltic Sea. ... Hilton Head Island is a town located in Beaufort County, South Carolina. ... Official language(s) English Capital Columbia Largest city Columbia Largest metro area Columbia Area  Ranked 40th  - Total 34,726 sq mi (82,965 km²)  - Width 200 miles (320 km)  - Length 260 miles (420 km)  - % water 6  - Latitude 32° 2′ N to 35° 13′ N  - Longitude 78° 32′ W to 83... Lung Kwu Chau (龍鼓洲) is an island at the northwest water of Hong Kong. ... Loe Pool. ... For other uses, see Cornwall (disambiguation). ... For other uses, see England (disambiguation). ... This article is about the island in New York State. ... This article is about the state. ... This article is about the Long Point located on the north shore of Lake Erie. ... Motto: Ut Incepit Fidelis Sic Permanet (Latin: Loyal she began, loyal she remains) Capital Toronto Largest city Toronto Official languages English (de facto) Government Lieutenant-Governor David C. Onley Premier Dalton McGuinty (Liberal) Federal representation in Canadian Parliament House seats 107 Senate seats 24 Confederation July 1, 1867 (1st) Area... Longboat Key is a barrier island off of the central western coast of Florida in the United States of America. ... This article is about the U.S. State of Florida. ... Macau Peninsula is the oldest and most populous part of Macau in the Peoples Republic of China. ... Location in Miami-Dade and the state of Florida. ... This article is about the U.S. State of Florida. ... Minnesota Point is a long, narrow peninsula that extends out from the Canal Park area of Duluth, Minnesota, and separating Lake Superior from the St. ... Duluth is the county seat of St. ... False colour NASA landsat image of Ninety Mile Beach and the Gippsland Lakes The Ninety Mile Beach is a sandy stretch of south-eastern coastline of Victoria, Australia which separates the Gippsland Lakes region from Bass Strait. ... VIC redirects here. ... Nickname: Location in Maryland Coordinates: , Country State County Worcester Founded 1875 Incorporated 1880 Government  - Mayor Rick Meehan Area  - Total 36. ... North Carolinas Outer Banks separating the Atlantic Ocean (east) from Albemarle Sound (north) and Pamlico Sound (south). ... Official language(s) English Capital Raleigh Largest city Charlotte Largest metro area Charlotte metro area Area  Ranked 28th  - Total 53,865 sq mi (139,509 km²)  - Width 150 miles (240 km)  - Length 560[1] miles (900 km)  - % water 9. ... Padre Island sand dunes. ... For other uses, see Texas (disambiguation). ... Port Said (postcard around 1915) Port Said (31. ... Ponte Vedra Beach is a seaside village 20 miles south east of Jacksonville, Florida. ... This article is about the U.S. State of Florida. ... Pui O (貝澳, or 杯澳), formerly Lo Pui O (螺杯澳), is an area on Lantau Island in Hong Kong. ... Nickname: Coordinates: , Country Region City seat Lingya District (苓雅區) Government  - Mayor Chen Chu (陳菊) Area  - Total 154 km² (59. ... Sable Island from space, April 1994. ... Motto: Munit Haec et Altera Vincit (Latin: One defends and the other conquers) Capital Halifax Largest city Halifax Regional Municipality Official languages English (de facto) Government Lieutenant-Governor Mayann E. Francis Premier Rodney MacDonald (PC) Federal representation in Canadian Parliament House seats 11 Senate seats 10 Confederation July 1, 1867... There are at least two Santa Rosa Islands: Santa Rosa Island, California is one of the Channel Islands of California. ... This article is about the U.S. State of Florida. ... Beach in Northern Mindoro Mindoro is the seventh-largest island in the Philippines. ... Sha Chau (沙洲) is an island at the northwest water of Hong Kong. ... Shek O - The rocky bay facing the South China Sea Shek O (Traditional Chinese: ) is a beachside town of several villages in the Southern District of Hong Kong, that includes Shek O Country Park, Shek O and Cape DAguilar. ... Ship Island is a famous tourist spot off the Gulf Coast of Mississippi. ... This article is about the U.S. state. ... Sriharikota (also Sriharikote) is a barrier island off the coast of Andhra Pradesh in India. ... Andhra redirects here. ... Stinson Beach Stinson Beach is a census-designated place (CDP) in Marin County, California, United States. ... This article is about the U.S. state. ... This article is about the U.S. State of Florida. ... This article is about the U.S. State of Florida. ... For other uses, see United States (disambiguation) and US (disambiguation). ... Coorong is a national park in South Australia (Australia), 156 km southeast of Adelaide. ... For the song, see South Australia (song). ... Twin Lakes is a census-designated place located in Santa Cruz County, California. ... This article is about the U.S. state. ... The West Frisian Islands (Dutch: Waddeneilanden) are a chain of islands in the North Sea off the Dutch coast. ... The West Frisian Islands (Dutch: Waddeneilanden) are a chain of islands in the North Sea off the Dutch coast. ... Winona is the county seat of Winona County6. ... Ma Shi Chau (馬屎洲 cantonese: ma5 si2 zau1) is one of the 235 islands of Hong Kong, under the administration of Tai Po District. ... Zingst peninsula is the eastern part of the peninsula Fischland Darss Zingst, which is between the cities Rostock and Stralsund at the southern Baltic Sea coast. ...

See also

• Sand spit
• Shingle beach

In geography, a spit is a deposition landform found off coasts. ... A shingle beach is a beach which is armoured with pebbles or small to medium sized cobbles. ...

Line notes

References

• Bascom, W. 1980. Waves and Beaches. Anchor Press/Doubleday, Garden City, New York. 366 p.