Sand dune in the context of Aoukar


Sand dune in the context of Aoukar

Sand dune Study page number 1 of 1

Play TriviaQuestions Online!

or

Skip to study material about Sand dune in the context of "Aoukar"


⭐ Core Definition: Sand dune

A dune is a landform composed of wind- or water-driven sand. It typically takes the form of a mound, ridge, or hill. An area with dunes is called a dune system or a dune complex. A large dune complex is called a dune field, while broad, flat regions covered with wind-swept sand or dunes, with little or no vegetation, are called ergs or sand seas. Dunes occur in different shapes and sizes, but most kinds of dunes are longer on the stoss (upflow) side, where the sand is pushed up the dune, and have a shorter slip face in the lee side. The valley or trough between dunes is called a dune slack.

Dunes are most common in desert environments, where the lack of moisture hinders the growth of vegetation that would otherwise interfere with the development of dunes. However, sand deposits are not restricted to deserts, and dunes are also found along sea shores, along streams in semiarid climates, in areas of glacial outwash, and in other areas where poorly cemented sandstone bedrock disintegrates to produce an ample supply of loose sand. Subaqueous dunes can form from the action of water flow (fluvial processes) on sand or gravel beds of rivers, estuaries, and the sea-bed.

↓ Menu
HINT:

👉 Sand dune in the context of Aoukar

Aoukar or Erg Aoukar (Arabic: عوكر) is a geological depression area of south eastern Mauritania. It is located between Kiffa and Néma, south of the Tagant Plateau. The region is also referred to as Hodh or El Hodh (Arabic: الحوض, lit.'the Basin').

The Aoukar basin is a dry natural region of sand dunes and salt pans fringed by escarpments on its northern and eastern sides.

↓ Explore More Topics
In this Dossier

Sand dune in the context of Gulf of Drin

The Gulf of Drin or Bay of Drin (Albanian: Gjiri i Drinit or Pellgu i Drinit) is an ocean basin of the Adriatic Sea within the Mediterranean Sea along the northern coast of Albania. Roughly scythe-shaped, it extends immediately from the Delta of the Buna in the north, across the port city of Shëngjin, to the Cape of Rodon in the south. The shoreline of the gulf is a shallow combination of sandy beaches, sand dunes, capes, salty and fresh water wetlands, estuaries, pine and coastal forests, reed beds and coastal meadows.

The shoreline of the gulf has a length of approximately 60 kilometres and is dotted with cliffs and beaches fed by fluvial imputes. The region is drained by numerous rivers and has formed a characteristic ecosystem and biodiversity. It is named after the Drin River that runs through a mountainous area towards the coast, however, the Ishëm and Mat also drain into the gulf. In consideration to the flat landscape, the gulf's shoreline are dotted with extensive wetlands and lagoons that continuously change in size and shape.

View the full Wikipedia page for Gulf of Drin
↑ Return to Menu

Sand dune in the context of Prevailing winds

In meteorology, prevailing wind in a region of the Earth's surface is a surface wind that blows predominantly from a particular direction. The dominant winds are the trends in direction of wind with the highest speed over a particular point on the Earth's surface at any given time. A region's prevailing and dominant winds are the result of global patterns of movement in the Earth's atmosphere. In general, winds are predominantly easterly at low latitudes globally. In the mid-latitudes, westerly winds are dominant, and their strength is largely determined by the polar cyclone. In areas where winds tend to be light, the sea breeze-land breeze cycle (powered by differential solar heating and night cooling of sea and land) is the most important cause of the prevailing wind. In areas which have variable terrain, mountain and valley breezes dominate the wind pattern. Highly elevated surfaces can induce a thermal low, which then augments the environmental wind flow. Wind direction at any given time is influenced by synoptic-scale and mesoscale weather like pressure systems and fronts. Local wind direction can also be influenced by microscale features like buildings.

Wind roses are tools used to display the history of wind direction and intensity. Knowledge of the prevailing wind allows the development of prevention strategies for wind erosion of agricultural land, such as across the Great Plains. Sand dunes can orient themselves perpendicular to the prevailing wind direction in coastal and desert locations. Insects drift along with the prevailing wind, but the flight of birds is less dependent on it. Prevailing winds in mountain locations can lead to significant rainfall gradients, ranging from wet across windward-facing slopes to desert-like conditions along their lee slopes.

View the full Wikipedia page for Prevailing winds
↑ Return to Menu

Sand dune in the context of Sandboarding

Sandboarding is a boardsport and extreme sport similar to snowboarding that involves riding down a sand dune while standing on a board, with both feet strapped in. Sand sledding can also be practised sitting down or lying on the belly or the back. It typically involves a sand sled, although it is also somewhat possible to use snow sleds or snowboards. The invention of modern sandboarding is largely attributed to Lon Beale, aka 'Doctor Dune', who began sandboarding in 1972 in California's Mojave Desert.

Sandboarding has adherents throughout the world, but is most prevalent in desert areas or coastal areas with beach dunes. It is less popular than snowboarding, partly because it is very difficult to build a mechanised ski lift on a sand dune, meaning participants must climb or ride a dune buggy or all-terrain vehicle back to the top of the dune. On the other hand, dunes are normally available year-round as opposed to ski resorts, which are seasonal.

View the full Wikipedia page for Sandboarding
↑ Return to Menu

Sand dune in the context of Pontine Marshes

The Pontine Marshes (/ˈpɒntn/ PON-tyne, US also /ˈpɒntn/ PON-teen; Italian: Agro Pontino [ˈaːɡro ponˈtiːno], formerly also Paludi Pontine; Latin: Pomptīnus Ager [sg.] by Titus Livius, Pomptīna Palus [sg.] and Pomptīnae Paludes [pl.] by Pliny the Elder) is an approximately quadrangular area of former marshland in the Lazio Region of central Italy, extending along the coast southeast of Rome about 45 km (28 mi) from just east of Anzio to Terracina (ancient Tarracina), varying in distance inland between the Tyrrhenian Sea and the Volscian Mountains (the Monti Lepini in the north, the Monti Ausoni in the center, and the Monti Aurunci in the south) from 15 to 25 km (9+12 to 15+12 mi). The northwestern border runs approximately from the mouth of the river Astura along the river and from its upper reaches to Cori in the Monti Lepini.

The former marsh is a low tract of mainly agricultural reclaimed land created by draining and filling, separated from the sea by sand dunes. The area amounts to about 80,000 hectares (200,000 acres). The Via Appia, a Roman military road constructed in 312 BC, crosses the inland side of the former marsh in a long, straight stretch flanked by trees. Before then, travelers had to use the Via Latina along the flanks of the mountains; Terracina could not be reached across the marsh.

View the full Wikipedia page for Pontine Marshes
↑ Return to Menu

Sand dune in the context of Martian regolith

Martian regolith or areolith is the fine blanket of unconsolidated, loose, heterogeneous superficial deposits covering the surface of Mars. The term Martian soil typically refers to the finer fraction of regolith. So far, no samples have been returned to Earth, the goal of a Mars sample-return mission, but the soil has been studied remotely with the use of Mars rovers and Mars orbiters. Its properties can differ significantly from those of terrestrial soil, including its toxicity due to the presence of perchlorates.

View the full Wikipedia page for Martian regolith
↑ Return to Menu

Sand dune in the context of Murzuk

Murzuk, Murzuq, Murzug or Merzug (Arabic: مرزق) is an oasis town and the capital of the Murzuq District in the Fezzan region of southwest Libya. It lies on the northern edge of the Murzuq Desert, an extremely arid region of ergs or great sand dunes which is part of the greater Sahara Desert.

View the full Wikipedia page for Murzuk
↑ Return to Menu

Sand dune in the context of Walney Island

Walney Island, also known as the Isle of Walney, is an island off the west coast of England, at the western end of Morecambe Bay in the Irish Sea. The island is in Cumbria and is also located within the boundaries of the historic county of Lancashire. It is part of Barrow-in-Furness and is separated from the mainland by Walney Channel, which is spanned by the Jubilee Bridge. Walney is the largest island of the Furness Islands group, both in population and size, as well as the largest English island in the Irish Sea. Its population at the 2011 UK Census was 10,651, distributed evenly across the island's two Wards of Walney North and Walney South.

Walney Island formed during the last glacial period, when the River Duddon was a large glacial lake, depositing till at its mouth, which became Walney. Some evidence of Neolithic inhabitants has been found in the island's sand dunes, though its name is likely of Norse origin. The island remained rural until the growth of Barrow-in-Furness' industries in the nineteenth century. In particular, the development between 1867 and 1881 of docks at Barrow Island, in Walney Channel opposite Walney, encouraged the growth of Walney as a settlement.

View the full Wikipedia page for Walney Island
↑ Return to Menu

Sand dune in the context of Snowdrift

A snowdrift is a deposit of snow sculpted by wind into a mound during a snowstorm. Snowdrifts resemble sand dunes and are formed in a similar manner, namely, by wind moving light snow and depositing it when the wind has virtually stopped, usually against a stationary object. Snow normally crests and slopes off toward the surface on the windward side of a large object. On the leeward side, areas near the object are a bit lower than surrounding areas but are generally flatter.

The impact of snowdrifts on transportation can be more significant than the snowfall itself, such as in the US during the Great Blizzard of 1978. Snowdrifts are usually found at or on roads, as the crest of the roadbed or the furrows along the road create the disruption to the wind needed to shed its carried snow. Snow fences may be employed on the windward side of the road to intentionally create a drift before the snow-laden wind reaches the road.

View the full Wikipedia page for Snowdrift
↑ Return to Menu

Sand dune in the context of Beach wrack

Beach wrack or marine wrack is organic material (e.g. kelp, seagrass, driftwood) and other debris deposited at high tide on beaches and other coastal areas, and may form a wrack line. This material acts as a natural input of marine resources into a terrestrial system, providing food and habitat for a variety of coastal organisms.

View the full Wikipedia page for Beach wrack
↑ Return to Menu

Sand dune in the context of Gibraltar Point, Lincolnshire

Gibraltar Point is a headland on the coast of Lincolnshire, England, 3.5 miles (5.6 km) south of Skegness, where the North Sea coast turns southwest towards Boston and enters The Wash. The point is at the southernmost point of a national nature reserve covering an area of about 4.3 km (1.7 sq mi) .

The reserve is owned by Lincolnshire County Council and East Lindsey District Council and is administered by the Lincolnshire Wildlife Trust. The reserve comprises two parallel ridges of sand dunes—the "east dunes" and the "west dunes"—separated by about half a kilometre (550 yards) of salt marsh; and an area on the seaward side with further salt marsh and sand, shingle and muddy beaches. The reserve extends for a distance of about 5 km (3 mi) along the coast, from the southern end of Skegness to the northern corner of The Wash . A golf course occupies much of the west dunes (the inland side) at the Skegness end of the area. Gibraltar Point is an area of coastal deposition—at the end of the 18th century the west dunes were by the shore, but they are now a kilometre inland.

View the full Wikipedia page for Gibraltar Point, Lincolnshire
↑ Return to Menu

Sand dune in the context of Hoge Veluwe National Park

De Hoge Veluwe National Park (Dutch pronunciation: [də ˈɦoːɣə ˈveːlyʋə]; "The High Veluwe") is a Dutch national park in the province of Gelderland near the cities of Ede, Wageningen, Arnhem and Apeldoorn. It is approximately 55 km (14,000 acres; 21 sq mi) in area, consisting of heathlands, sand dunes, and woodlands. It is situated in the Veluwe, the area of the largest terminal moraine in the Netherlands. Most of the landscape of the park and the Veluwe was created during the last ice age. The alternating sand dune areas and heathlands may have been caused by human utilization of the surrounding lands. The park forms one of the largest continuous nature reserves in the Netherlands.

View the full Wikipedia page for Hoge Veluwe National Park
↑ Return to Menu

Sand dune in the context of Coll

Coll (/ˈkɒl/; Scottish Gaelic: Cola) is an island located west of the Isle of Mull and northeast of Tiree in the Inner Hebrides of Scotland. Coll is known for its sandy beaches, which rise to form large sand dunes, for its corncrakes, and for Breacachadh Castle. It is in the council area of Argyll and Bute. Arinagour is the main settlement on Coll. There is a ferry terminal on the island which connects it with the mainland of Scotland. Coll also has a small airport. The island is rural in nature and has been awarded Dark Sky status.

View the full Wikipedia page for Coll
↑ Return to Menu

Sand dune in the context of Hook of Holland

Hook of Holland (Dutch: Hoek van Holland, pronounced [ˈɦuk fɑn ˈɦɔlɑnt] ) is a coastal village in the southwestern corner of Holland, hence the name; hoek means "corner" and was in use before the word kaap – "cape". The English translation using Hook is a false friend of the Dutch Hoek, but has become commonplace in the Netherlands (in official government records in English, the name tends not to get translated and Hoek van Holland is used). It is located at the mouth of the New Waterway shipping canal into the North Sea. The village is administered as a district of the municipality of Rotterdam. Its district covers an area of 18.53 km, of which 14.19 km is land. On 1 January 2023 it had an estimated population of 10,560.

Settlements near "the Hook" (de Hoek) include the small towns Monster, Naaldwijk and 's-Gravenzande and the city Delft to the northeast, and the town Maassluis to the southeast. On the other side of the river is the harbor Europort and the Maasvlakte. The wide sandy beach, one section of which is designated for use by naturists, runs for approximately 18 kilometres to Scheveningen and for most of this distance is backed by extensive sand dunes through which there are foot and cycle paths. On the north side of the New Waterway, to the west of the village, is a pier, part of which is accessible to pedestrians and cyclists.

View the full Wikipedia page for Hook of Holland
↑ Return to Menu