Sand bars in the Mississippi River at Arkansas and Mississippi

A bar is a linear shoaling landform feature within a body of water. Bars tend to be long and narrow (linear) and develop where a current (or waves) promote deposition of particles, resulting in localized shallowing (shoaling) of the water. Bars can appear in the sea, in a lake, or in a river. They are typically composed of sand, although could be of any particulate 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 size of the particles 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. A vessel run aground on a bar is arguably worse off than one run aground on stationary rocks, because of the destructive capacity of the shifting action. 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. ... The Mississippi River, derived from the old Ojibwe word misi-ziibi meaning great river (gichi-ziibi big river at its headwaters), is the second-longest river in the United States; the longest is the Missouri River, which flows into the Mississippi. ... Official language(s) English Capital Largest city Little Rock Little Rock Area  Ranked 29th  - Total 53,179 sq mi  (137,732 km²)  - Width 239 miles (385 km)  - Length 261 miles (420 km)  - % water 2. ... Official language(s) English Capital Jackson Largest city Jackson Area  - Total  - Width  - Length  - % water  - Latitude  - Longitude Ranked 32nd 125,443 km² 275 km 545 km 3 30°13N to 35°N 88°7W to 91°41W Population  - Total (2000)  - Density Ranked 31st 2,697,243 23. ... The word linear comes from the Latin word linearis, which means created by lines. ... A shoal is a sandbank or bar creating a shallow. ... A landform comprises a geomorphological unit. ... Water (from the Old English waeter; c. ... A current is a movement or flow of fluids, especially water in a river or ocean. ... Deposition, also known as sedimentation, is the geological process whereby material is added to a landform. ... In physics, a particle is an object, or body, with only a few degrees-of-freedom, including position, and perhaps orientation in space. ... Sunset at sea Look up Sea in Wiktionary, the free dictionary Look up maritime in Wiktionary, the free dictionary. ... A lake is a body of water surrounded by land. ... The Murray River in Australia. ... Patterns in the sand Sand is an example of a class of materials called granular matter. ... Soil is the material on the surface of a lithosphere subject to weathering, and especially the earthy portion of that material. ... Silt refers to soil or rock particles of a certain very small size range (see grain size). ... Gravel being unloaded from a barge Gravel is rock that is of a certain grain size range. ... Cobble is a geologic term for a rock or rock fragment with a grain size with dimensions between 64–256 mm (2. ... The word shingle has several distinct meanings in the English language: Photograph of wood shingles, also called shakes, as used in roofing. ... In geology, a boulder is a rock with grain size of more than 256 mm (10 inches) diameter. ...

The term bar can apply to landform features over a considerable range in size, from just a few meters in a small stream to marine depositions stretching for hundreds of kilometres along a coastline, often called barrier islands. A kilometre (American spelling: kilometer), symbol: km is a unit of length in the metric system equal to 1000 metres (from the Greek words χίλια (khilia) = thousand and μέτρο (metro) = count/measure). ...

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 formation that shallows the entrance to or the course of a river or creek. This article is in need of attention. ... A shoal is a sandbank or bar creating a shallow. ... A reef surrounding an islet. ... There are several traditions of navigation. ... 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. ... Silt refers to soil or rock particles of a certain very small size range (see grain size). ... The Murray River in Australia. ... A running stream. ...

Sandbars and longshore bars

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. 90 mile beach Australia A beach or strand is a geological formation consisting of loose rock particles such as sand, shingle, cobble, or even shell along the shoreline of a body of water. ... A berm is a level space or shelf separating two features. ... The tide is the cyclic rising and falling of Earths ocean surface caused by the tidal forces of the Moon and the Sun acting on the Earth. ... In geology, a trough generally referrs to a depression that extends laterally over a distence, while being less steep than a trench. ...

Bars as geological units

In addition to longshore bars discussed above that are relatively small features of a beach, the term bar 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. 90 mile beach Australia A beach or strand is a geological formation consisting of loose rock particles such as sand, shingle, cobble, or even shell along the shoreline of a body of water. ... In geography, a spit is a deposition landform found off coasts. ... RIA can stand for: Royal Irish Academy Rich Internet Application Research into Ageing Radioimmunoassay Regional Intelligence Analyst Research Institute of America RIA, the National Rail code for Rhoose Cardiff International Airport railway station, Wales. ... Tombolo at Stockton Island, Ashland County, WI A tombolo in Puget Sound A tombolo is a deposition landform such as a spit or bar which forms a narrow piece of land between an island or offshore rock and a mainland shore, or between two islands or offshore rocks. ... The Isthmus of Panama connects North and South America. ... 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 are the barrier islands, such as occur along the East Coast of the United States, as well as along the Gulf coast. Regional definitions vary from source to source. ... Gulf of Mexico in 3D perspective. ...

In places of reentrance 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. In geography, longshore drift (LSD) (shore drift or littoral drift) is a process by which sediments move along a beach shore. ... In geography, 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. ... This article is about marsh, a type of wetland. ...

Examples

• Abidjan, Côte d'Ivoire
• Ap Lei Chau - Ap Lei Pai, Hong Kong
• Barnegat Bay, New Jersey, United States
• Cape Canaveral, Florida, United States
• Cape St. Paul, Ghana
• Chesil Beach, Dorset, United Kingdom
• Cheung Chau, Hong Kong
• Ediz Hook, Port Angeles, Washington, United States
• Galveston Island, Texas, United States
• Great Yarmouth, England
• Lung Kwu Chau, Hong Kong
• Looe Pool, Cornwall, England
• Long Island, New York, 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
• Padre Island, Texas, United States
• Pamlico Sound, North Carolina, United States
• Port Said, Egypt
• Pui O, Hong Kong
• Sable Island, Nova Scotia, Canada
• Santa Rosa Island, FL, Florida, United States
• Sha Chau, Hong Kong
• Shek O Headland - Tai Tau Chau, Hong Kong
• Sriharikota, Andhra Pradesh, India
• Stinson Beach, California, USA
• 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

Abidjan is the largest city and former capital of Côte dIvoire. ... Ap Lei Chau (鴨脷洲) is an island of Hong Kong, located south-west of Hong Kong Island, next to Aberdeen Harbour, 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. ... Official language(s) None, English de facto Capital Largest city Trenton Newark Area  Ranked 47th  - Total 8,729 sq. ... Cape Canaveral from space, August 1991 Cape Canaveral (Cabo Cañaveral in Spanish) is a strip of land in Brevard County, Florida, United States, near the center of that states Atlantic coast. ... Official language(s) English Capital Tallahassee Largest city Jacksonville Area  Ranked 22nd  - Total 65,794 sq. ... Chesil Beach from Fortuneswell Chesil Beach (sometimes called Chesil Bank) is a 18 mile (29km) long, 200 metre wide and 18 metre high shingle tombolo in Dorset, southern England. ... Dorset (pronounced Dorsit, sometimes in the past called Dorsetshire) is a county in the southwest of England, on the English Channel coast. ... Cheung Chau (é•·æ´²; lit. ... Port Angeles is a city located in Clallam County, Washington. ... Galveston redirects here. ... Official language(s) See: Languages of Texas Capital Largest city Austin Houston Area  Ranked 2nd  - Total 268,581 sq. ... Map sources for Great Yarmouth at grid reference TG5207 Great Yarmouth is an English coastal town in the county of Norfolk. ... Royal motto (French): Dieu et mon droit (Translated: God and my right) Englands location (dark green) within the United Kingdom (light green), with the Republic of Ireland (blue) to its west Languages None official English de facto Capital None official London de facto Largest city London Area – Total Ranked... Lung Kwu Chau (龍鼓洲) is an island at the northwest water of Hong Kong. ... Cornwall (Cornish: Kernow) is a county at the extreme South-West of England on the peninsula that lies to the west of the River Tamar. ... Royal motto (French): Dieu et mon droit (Translated: God and my right) Englands location (dark green) within the United Kingdom (light green), with the Republic of Ireland (blue) to its west Languages None official English de facto Capital None official London de facto Largest city London Area – Total Ranked... Mercator projection of Long Island Long Island is an island in New York, USA. At 1,377 square miles (3567 km²) and 7. ... Official language(s) None, English de facto Capital Largest city Albany New York City Area  Ranked 27th  - Total 54,520 sq mi  (141,205 km²)  - Width 285 miles (455 km)  - Length 330 miles (530 km)  - % water 13. ... Macau Peninsula (澳門半島 Pinyin: Aomen Bandao; Portuguese: Península de Macau) is the oldest and most populous part of Macau in the Peoples Republic of China. ... Location of Miami Beach in Miami-Dade County, Florida. ... Official language(s) English Capital Tallahassee Largest city Jacksonville Area  Ranked 22nd  - Total 65,794 sq. ... 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. ... Map Political Statistics Founded 1679 Incorporated 1800s County 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. ... Emblems: Pink heath (floral) helmeted honeyeater (bird) Leadbeaters possum (faunal) Motto: Peace and Prosperity Slogan or Nickname: Garden State, The Place To Be, On The Move Other Australian states and territories Capital Melbourne Government Governor Premier Const. ... Motto: Nickname: The White Marlin Capital Map Political Statistics Founded 1875 Incorporated 1880 Worcester County Mayor James N. Mathias, Jr Geographic Statistics Area  - Total  - Land  - Water 94. ... A map of Padre Island. ... Official language(s) See: Languages of Texas Capital Largest city Austin Houston Area  Ranked 2nd  - Total 268,581 sq. ... Pamlico Sound with the southern Outer Banks. ... Official language(s) English Capital Largest city Raleigh Charlotte Area  Ranked 28th  - Total 53,865 sq. ... Port Said (postcard around 1915) Port Said (31. ... Sable Island is situated 180 km southeast of Nova Scotia, Canada in the Atlantic Ocean. ... Motto: Munit Haec et Altera Vincit (Latin: One defends and the other conquers) Official languages None (English,French,Gaelic) Capital Halifax Largest city Halifax Lieutenant-Governor Myra Freeman Premier Rodney MacDonald (PC) Parliamentary representation  - House seat  - Senate seats 11 10 Area Total  â€¢ Land  â€¢ Water    (% of total)  Ranked 12th 55,283... There are at least two Santa Rosa Islands: Santa Rosa Island, California is one of the Channel Islands of California. ... Official language(s) English Capital Tallahassee Largest city Jacksonville Area  Ranked 22nd  - Total 65,794 sq. ... Sha Chau (沙洲) is an island at the northwest water of Hong Kong. ... Shek O (石澳) is a beachside village in the Southern District, Hong Kong, that includes Shek O Country Park, Shek O and Cape DAguillar (鶴咀). ... Sriharikota (also Sriharikote) is a barrier island off the coast of Andhra Pradesh in India. ... Andhra Pradesh : (ఆంధ్ర ప్రదేశ్; Ä€ndhra Prādesh), is a state in South India. ... Official language(s) English Capital Sacramento Largest city Los Angeles Area  Ranked 3rd  - Total 158,302 sq. ... Coorong is a national park in South Australia (Australia), 156 km southeast of Adelaide. ... Emblems: Hairy Nosed Wombat (faunal); Sturts Desert Pea (floral); Opal (gemstone); Leafy Seadragon (marine) Motto: United for the Common Wealth Slogan or Nickname: Festival State Other Australian states and territories Capital Adelaide Government Governor Premier Const. ... Twin Lakes is a census-designated place located in Santa Cruz County, California. ... Official language(s) English Capital Sacramento Largest city Los Angeles Area  Ranked 3rd  - Total 158,302 sq. ... 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. ...

References

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