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Tombolo
A tombolo is a sandy or shingle isthmus. It is a deposition landform by which an island becomes attached to the mainland by a narrow piece of land such as a spit or bar. Once attached, the island is then known as a tied island. The word ''tombolo'' is from the Italian ', meaning 'pillow' or 'cushion', and sometimes translated incorrectly as '' ayre'' (an ayre is a shingle beach of any kind). Several islands tied together by bars which rise above the water level are called a tombolo cluster. Two or more tombolos may form an enclosure (called a lagoon) that can eventually fill with sediment. Formation The shoreline moves toward the island (or detached breakwater) owing to the accretion of sand in the lee of the island, where wave energy and longshore drift are reduced and therefore deposition of sand occurs. Wave diffraction and refraction True tombolos are formed by wave refraction and diffraction. As waves near an island, they are slowed by the shallow water surroundi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tombolo Paximadhi Eboea
A tombolo is a sandy or shingle isthmus. It is a deposition (sediment), deposition landform by which an island becomes attached to the mainland by a narrow piece of land such as a spit (landform), spit or bar (landform), bar. Once attached, the island is then known as a tied island. The word ''tombolo'' is from the Italian language, Italian ', meaning 'pillow' or 'cushion', and sometimes translated incorrectly as ''Ayre (landform), ayre'' (an ayre is a shingle beach of any kind). Several islands tied together by bars which rise above the water level are called a tombolo cluster. Two or more tombolos may form an enclosure (called a lagoon) that can eventually fill with sediment. Formation The shoreline moves toward the island (or detached breakwater (structure), breakwater) owing to the accretion of sand in the lee of the island, where wave energy and longshore drift are reduced and therefore deposition of sand occurs. Wave diffraction and refraction True tombolos are formed by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tied Island
A tied island or land-tied island is a landform consisting of an island that is connected to the mainland or another island only by a tombolo, which is a spit of beach materials connected to land at both ends. St Ninian's Isle in the Shetland Islands off the north coast of Scotland is an example: it was once an island but is now linked to the mainland. Other examples include Maury Island, Washington in Puget Sound, Coronado, California, and Nahant, Massachusetts in the United States; Paraguana Peninsula in Venezuela; Barrenjoey, New South Wales and Wedge Island, Western Australia; Paratutae Island in New Zealand; Mount Hakodate in Japan, Howth Head in Ireland; Davaar Island, Campbeltown, Scotland; Chefoo island in Yantai, China; and Cheung Chau in Hong Kong. The Isle of Portland, in England, is also described as a tied island, but geographers now believe that Chesil Beach, which connects the island to the mainland, is a barrier beach that has moved eastwards, ra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barrenjoey, New South Wales
Barrenjoey is a locality in the suburb of Palm Beach, New South Wales, Palm Beach, at the most northern tip of Pittwater. The headland is made up primarily of sandstones of the Newport Formation (NSW), Newport Formation, the top third is a cap of Hawkesbury sandstone. Around 10,000 years ago the headland was cut off from the mainland due to the rising sea level; subsequent buildup of a sand spit or tombolo reconnected the island to the mainland (a 'tied island'). It is the location of the Barrenjoey Head Lighthouse, a lighthouse that was first lit in 1881. In 1995 Barrenjoey was gazetted into Ku-ring-gai Chase National Park. History On 2 March 1788, Arthur Phillip named the headland "Barrenjuee" (meaning little kangaroo or wallaby). The name changed its spelling over time, Barrenjoey now being the accepted name since 1966. Since the 1980s it has been featured heavily in the soap opera ''Home and Away'', during both the Credit (creative arts), credits and the show itself. Ecolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aupōuri Peninsula
The Aupōuri Peninsula is a tombolo at the northern tip of the North Island of New Zealand. It projects between the Tasman Sea to the west and the Pacific Ocean to the east. It constitutes the northern part of the Far North District, incorporating North Cape, Houhora and the northern half of Awanui. History The peninsula was an important location for the kauri gum digging trade, which peaked between 1890 and 1935. High quality kauri gum was found around the Parengarenga Harbour in the north, which led to the development of the Parenga Gumfield Company. After 1910, gum digging intensified in the southern half of the peninsula, as the poorer grade gum found in this region greatly increased in value. Overview It is a peninsula on a peninsula, being part of the massive Northland Peninsula (also called the North Auckland Peninsula) which makes up nearly one twelfth of New Zealand's land area. Close to the northern town of Kaitaia, the Northland Peninsula suddenly narrows f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shore
A coast (coastline, shoreline, seashore) is the land next to the sea or the line that forms the boundary between the land and the ocean or a lake. Coasts are influenced by the topography of the surrounding landscape and by aquatic erosion, such as that caused by waves. The geological composition of rock and soil dictates the type of shore that is created. Earth has about of coastline. Coasts are important zones in natural ecosystems, often home to a wide range of biodiversity. On land, they harbor ecosystems, such as freshwater or estuarine wetlands, that are important for birds and other terrestrial animals. In wave-protected areas, coasts harbor salt marshes, mangroves, and seagrasses, all of which can provide nursery habitat for finfish, shellfish, and other aquatic animals. Rocky shores are usually found along exposed coasts and provide habitat for a wide range of sessile animals (e.g. mussels, starfish, barnacles) and various kinds of seaweeds. In physical ocean ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spit (landform)
A spit (cognate with the word for a rotisserie bar) or sandspit is a deposition (geology), deposition shoal, bar or beach landform off coasts or lake shores. It develops in places where re-entrance occurs, such as at a cove's headlands, by the process of longshore drift by longshore currents. The drift occurs due to waves meeting the beach at an oblique angle, moving sediment down the beach in a zigzag pattern. This is complemented by longshore currents, which further sediment transport, transport sediment through the water alongside the beach. These currents are caused by the same waves that cause the drift. Hydrology and geology Where the direction of the shore inland ''re-enters'', or changes direction, for example at a headland, the longshore current spreads out or dissipates. No longer able to carry the full load, much of the sediment is dropped. This is called deposition. This submerged bar of sediment allows longshore drift or littoral drift to continue to transport sed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isle Of Portland
The Isle of Portland is a tied island, long by wide, in the English Channel. The southern tip, Portland Bill, lies south of the resort of Weymouth, Dorset, Weymouth, forming the southernmost point of the county of Dorset, England. A barrier beach called Chesil Beach joins Portland with mainland England. The A354 road passes down the Portland end of the beach and then over the Fleet Lagoon by bridge to the mainland. The population of Portland is 13,417. Portland is a central part of the Jurassic Coast, a World Heritage Site on the Dorset and east Devon coast, important for its geology and landforms. Portland stone, a limestone famous for its use in British and world architecture, including St Paul's Cathedral and the United Nations Headquarters, continues to be quarried here. Portland Harbour, in between Portland and Weymouth, is one of the largest man-made harbours in the world. The harbour was made by the building of stone breakwater (structure), breakwaters between 1848 a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chesil Beach
Chesil Beach (also known as Chesil Bank) in Dorset, England, is one of three major shingle beach structures in Britain.A. P. Carr and M. W. L. Blackley, "Investigations Bearing on the Age and Development of Chesil Beach, Dorset, and the Associated Area" ''Transactions of the Institute of British Geographers'', No. 58 (March 1973) pp. 99-111. Its name is derived from the word '' chessil'' (Old English or ), meaning "gravel" or "shingle". It runs for a length of from West Bay to the Isle of Portland and in places is up to high and wide. Behind the beach is the Fleet, a shallow tidal lagoon. Both are part of the Jurassic Coast and a UNESCO World Heritage Site, and together form a Site of Special Scientific Interest (SSSI) and a Ramsar Site. Owners of the land designated as ''Chesil & The Fleet'' SSSI include the Crown Estate, the Ministry of Defence and the National Trust. The beach is almost entirely made of stone shingle, and the typical size of stones reduces steadi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bar (landform)
In oceanography, geomorphology, and geoscience, a shoal is a natural submerged ridge, bank, or bar that consists of, or is covered by, sand or other unconsolidated material, and rises from the bed of a body of water close to the surface or above it, which poses a danger to navigation. Shoals are also known as sandbanks, sandbars, or gravelbars. Two or more shoals that are either separated by shared troughs or interconnected by past or present sedimentary and hydrographic processes are referred to as a shoal complex.Neuendorf, K.K.E., J.P. Mehl Jr., and J.A. Jackson, eds. (2005) ''Glossary of Geology'' (5th ed.). Alexandria, Virginia, American Geological Institute. 779 pp. The term ''shoal'' is also used in a number of ways that can be either similar to, or quite different from, how it is used in geologic, geomorphic, and oceanographic literature. Sometimes, the term refers to either any relatively shallow place in a stream, lake, sea, or other body of water; a rocky are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spit (landform)
A spit (cognate with the word for a rotisserie bar) or sandspit is a deposition (geology), deposition shoal, bar or beach landform off coasts or lake shores. It develops in places where re-entrance occurs, such as at a cove's headlands, by the process of longshore drift by longshore currents. The drift occurs due to waves meeting the beach at an oblique angle, moving sediment down the beach in a zigzag pattern. This is complemented by longshore currents, which further sediment transport, transport sediment through the water alongside the beach. These currents are caused by the same waves that cause the drift. Hydrology and geology Where the direction of the shore inland ''re-enters'', or changes direction, for example at a headland, the longshore current spreads out or dissipates. No longer able to carry the full load, much of the sediment is dropped. This is called deposition. This submerged bar of sediment allows longshore drift or littoral drift to continue to transport sed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landform
A landform is a land feature on the solid surface of the Earth or other planetary body. They may be natural or may be anthropogenic (caused or influenced by human activity). Landforms together make up a given terrain, and their arrangement in the landscape is known as topography. Landforms include hills, mountains, canyons, and valleys, as well as shoreline features such as bays, peninsulas, and seas, including submerged features such as mid-ocean ridges, volcanoes, and the great oceanic basins. Physical characteristics Landforms are categorized by characteristic physical attributes such as elevation, slope, orientation, structure stratification, rock exposure, and soil type. Gross physical features or landforms include intuitive elements such as berms, cliffs, hills, mounds, peninsulas, ridges, rivers, valleys, volcanoes, and numerous other structural and size-scaled (e.g. ponds vs. lakes, hills vs. mountains) elements including various kinds of inland ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biddeford Pool
Biddeford Pool is a neighborhood within the city of Biddeford, Maine, named for a large tidal pool located off Saco Bay (Maine), Saco Bay south of the mouth of the Saco River. It is approximately southeast of downtown Biddeford, Maine, Biddeford, to which it is connected via State Route 208 (Maine), State Route 208. The center of Kennebunkport, Maine, Kennebunkport is to the southwest, connected via Maine State Route 9, State Route 9. Biddeford Pool has a post office with the ZIP Code 04006. Background Biddeford Pool is the site of Maine's first recorded permanent settlement, then called Winter Harbor (not to be confused with present-day Winter Harbor, Maine). In the winter of 1616-1617, Richard Vines (colonist), Richard Vines, a physician, resided here as part of the colonization efforts of Sir Ferdinando Gorges, lord proprietor of Maine. An early village developed on the north side. In 1688, Fort Mary (Maine), Fort Mary was built near the pool's entrance. The former Fletcher ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
