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A dune is a landform composed of wind- or water-driven sand. It typically takes the form of a mound, ridge, or hill.^[1] An area with dunes is called a dune system^[2]^[3]^[4]^[5] or a dune complex.^[6] A large dune complex is called a dune field,^[7] while broad, flat regions covered with wind-swept sand or dunes, with little or no vegetation, are called ergs or sand seas.^[8]^[9]^[10] 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.^[11] The valley or trough between dunes is called a dune slack.^[12]

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.^[13] Subaqueous dunes can form from the action of water flow (fluvial processes) on sand or gravel beds of rivers, estuaries, and the sea-bed.^[14]^[15]

Some coastal areas have one or more sets of dunes running parallel to the shoreline directly inland from the beach. In most cases, the dunes are important in protecting the land against potential ravages by storm waves from the sea.^[16] Artificial dunes are sometimes constructed to protect coastal areas.^[17]^[18] The dynamic action of wind and water can sometimes cause dunes to drift, which can have serious consequences. For example, the town of Eucla, Western Australia, had to be relocated in the 1890s because of dune drift.^[19]

The modern word "dune" came into English from French around 1790,^[20] which in turn came from Middle Dutch dūne.^[14]

Formation

A universally precise distinction does not exist between ripples, dunes, and draas,^[21] which are all deposits of the same type of materials. Dunes are generally defined as greater than 7 cm tall and may have ripples, while ripples are deposits that are less than 3 cm tall.^[22] A draa is a very large aeolian landform, with a length of several kilometers and a height of tens to hundreds of meters, and which may have superimposed dunes.^[23]

Dunes are made of sand-sized particles, and may consist of quartz, calcium carbonate, snow, gypsum, or other materials. The upwind/upstream/upcurrent side of the dune is called the stoss side; the downflow side is called the lee side. Sand is pushed (creep) or bounces (saltation) up the stoss side, and slides down the lee side. A side of a dune that the sand has slid down is called a slip face (or slipface).

The Bagnold formula gives the speed at which particles can be transported.

Aeolian dunes

Aeolian dune shapes

Five basic dune types are recognized: crescentic, linear, star, dome, and parabolic. Dune areas may occur in three forms: simple (isolated dunes of basic type), compound (larger dunes on which smaller dunes of same type form), and complex (combinations of different types).^[24]

Barchan or crescentic

Barchan dunes are crescent-shaped mounds which are generally wider than they are long. The lee-side slipfaces are on the concave sides of the dunes. These dunes form under winds that blow consistently from one direction (unimodal winds). They form separate crescents when the sand supply is comparatively small. When the sand supply is greater, they may merge into barchanoid ridges, and then transverse dunes (see below).

Some types of crescentic dunes move more quickly over desert surfaces than any other type of dune. A group of dunes moved more than 100 metres per year between 1954 and 1959 in China's Ningxia Province, and similar speeds have been recorded in the Western Desert of Egypt. The largest crescentic dunes on Earth, with mean crest-to-crest widths of more than three kilometres, are in China's Taklamakan Desert.^[24]

Transverse dunes

Abundant barchan dunes may merge into barchanoid ridges, which then grade into linear (or slightly sinuous) transverse dunes, so called because they lie transverse, or across, the wind direction, with the wind blowing perpendicular to the ridge crest.^[25]

Seif or longitudinal dunes

Seif dunes are linear (or slightly sinuous) dunes with two slip faces.^[25] The two slip faces make them sharp-crested. They are called seif dunes after the Arabic word for "sword". They may be more than 160 kilometres (100 miles) long, and thus easily visible in satellite images (see illustrations).

Seif dunes are associated with bidirectional winds. The long axes and ridges of these dunes extend along the resultant direction of sand movement (hence the name "longitudinal").^[26] Some linear dunes merge to form Y-shaped compound dunes.^[24]

Formation is debated. Ralph Bagnold, in The Physics of Blown Sand and Desert Dunes, suggested that some seif dunes form when a barchan dune moves into a bidirectional wind regime, and one arm or wing of the crescent elongates. Others suggest that seif dunes are formed by vortices in a unidirectional wind.^[25] In the sheltered troughs between highly developed seif dunes, barchans may be formed, because the wind is constrained to be unidirectional by the dunes.

Rub' al Khali (Arabian Empty Quarter) sand dunes imaged by Terra (EOS AM-1). Most of these dunes are seif dunes. Their origin from barchans is suggested by the stubby remnant "hooks" seen on many of the dunes. Wind would be from left to right.
Large linear seif dunes in the Great Sand Sea in southwest Egypt, seen from the International Space Station. The distance between each dune is 1.5–2.5 km.
The average-direction-longitudinal model of seif dune formation
By contrast, transverse dunes form with the wind blowing perpendicular to the ridges, and have only one slipface, on the lee side. The stoss side is less steep.
Transverse dunes lie perpendicular to the wind, which moves them forwards, producing the cross-bedding shown here.

Seif dunes are common in the Sahara. They range up to 300 m (980 ft) in height and 300 km (190 mi) in length. In the southern third of the Arabian Peninsula, a vast erg, called the Rub' al Khali or Empty Quarter, contains seif dunes that stretch for almost 200 km (120 mi) and reach heights of over 300 m (980 ft).

Linear loess hills known as pahas are superficially similar. These hills appear to have been formed during the last ice age under permafrost conditions dominated by sparse tundra vegetation.

Star

Star dunes are pyramidal sand mounds with slipfaces on three or more arms that radiate from the high center of the mound. They tend to accumulate in areas with multidirectional wind regimes. Star dunes grow upward rather than laterally. They dominate the Grand Erg Oriental of the Sahara. In other deserts, they occur around the margins of the sand seas, particularly near topographic barriers. In the southeast Badain Jaran Desert of China, the star dunes are up to 500 metres tall and may be the tallest dunes on Earth.

Dome

Oval or circular mounds that generally lack a slipface. Dome dunes are rare and occur at the far upwind margins of sand seas.

Lunettes

Fixed crescentic dunes that form on the leeward margins of playas and river valleys in arid and semiarid regions in response to the direction (s) of prevailing winds, are known as lunettes, source-bordering dunes, bourrelets and clay dunes. They may be composed of clay, silt, sand, or gypsum, eroded from the basin floor or shore, transported up the concave side of the dune, and deposited on the convex side. Examples in Australia are up to 6.5 km long, 1 km wide, and up to 50 metres high. They also occur in southern and West Africa, and in parts of the western United States, especially Texas.^[27]

Parabolic

U-shaped mounds of sand with convex noses trailed by elongated arms are parabolic dunes. These dunes are formed from blowout dunes where the erosion of vegetated sand leads to a U-shaped depression. The elongated arms are held in place by vegetation; the largest arm known on Earth reaches 12 km. Sometimes these dunes are called U-shaped, blowout, or hairpin dunes, and they are well known in coastal deserts. Unlike crescent shaped dunes, their crests point upwind. The bulk of the sand in the dune migrates forward.

In plan view, these are U-shaped or V-shaped mounds of well-sorted, very fine to medium sand with elongated arms that extend upwind behind the central part of the dune. There are slipfaces that often occur on the outer side of the nose and on the outer slopes of the arms.

These dunes often occur in semiarid areas where the precipitation is retained in the lower parts of the dune and underlying soils. The stability of the dunes was once attributed to the vegetative cover but recent research has pointed to water as the main source of parabolic dune stability. The vegetation that covers them—grasses, shrubs, and trees—help anchor the trailing arms. In inland deserts, parabolic dunes commonly originate and extend downwind from blowouts in sand sheets only partly anchored by vegetation. They can also originate from beach sands and extend inland into vegetated areas in coastal zones and on shores of large lakes.

Most parabolic dunes do not reach heights higher than a few tens of metres except at their nose, where vegetation stops or slows the advance of accumulating sand.

Simple parabolic dunes have only one set of arms that trail upwind, behind the leading nose. Compound parabolic dunes are coalesced features with several sets of trailing arms. Complex parabolic dunes include subsidiary superposed or coalesced forms, usually of barchanoid or linear shapes.

Parabolic dunes, like crescent dunes, occur in areas where very strong winds are mostly unidirectional. Although these dunes are found in areas now characterized by variable wind speeds, the effective winds associated with the growth and migration of both the parabolic and crescent dunes probably are the most consistent in wind direction.

The grain size for these well-sorted, very fine to medium sands is about 0.06 to 0.5 mm. Parabolic dunes have loose sand and steep slopes only on their outer flanks. The inner slopes are mostly well packed and anchored by vegetation, as are the corridors between individual dunes. Because all dune arms are oriented in the same direction, and, the inter-dune corridors are generally swept clear of loose sand, the corridors can usually be traversed in between the trailing arms of the dune. However to cross straight over the dune by going over the trailing arms, can be very difficult. Also, traversing the nose is very difficult as well because the nose is usually made up of loose sand without much if any vegetation.

A type of extensive parabolic dune that lacks discernible slipfaces and has mostly coarse grained sand is known as a zibar.^[28] The term zibar comes from the Arabic word to describe "rolling transverse ridges ... with a hard surface".^[29] The dunes are small, have low relief, and can be found in many places across the planet from Wyoming (United States) to Saudi Arabia to Australia.^[30] Spacing between zibars ranges from 50 to 400 metres and they do not become more than 10 metres high.^[31] The dunes form at about ninety degrees to the prevailing wind which blows away the small, fine-grained sand leaving behind the coarser grained sand to form the crest.^[32]

Reversing dunes

Occurring wherever winds periodically reverse direction, reversing dunes are varieties of any of the above shapes. These dunes typically have major and minor slipfaces oriented in opposite directions. The minor slipfaces are usually temporary, as they appear after a reverse wind and are generally destroyed when the wind next blows in the dominant direction.^[25]

Draas

Draas are very large-scale dune bedforms; they may be tens or a few hundreds of metres in height, kilometres wide, and hundreds of kilometres in length.^[25] After a draa has reached a certain size, it generally develops superimposed dune forms.^[33] They are thought to be more ancient and slower-moving than smaller dunes,^[25] and to form by vertical growth of existing dunes. Draas are widespread in sand seas and are well-represented in the geological record.^[33]

Dune complexity

All these dune shapes may occur in three forms: simple (isolated dunes of basic type), compound (larger dunes on which smaller dunes of same type form), and complex (combinations of different types).^[24] Simple dunes are basic forms with the minimum number of slipfaces that define the geometric type. Compound dunes are large dunes on which smaller dunes of similar type and slipface orientation are superimposed. Complex dunes are combinations of two or more dune types. A crescentic dune with a star dune superimposed on its crest is the most common complex dune. Simple dunes represent a wind regime that has not changed in intensity or direction since the formation of the dune, while compound and complex dunes suggest that the intensity and direction of the wind has changed.

Dune movement

The sand mass of dunes can move either windward or leeward, depending on if the wind is making contact with the dune from below or above its apogee. If wind hits from above, the sand particles move leeward; the leeward flux of sand is greater than the windward flux. Conversely, if sand hits from below, sand particles move windward. Further, if the wind is carrying sand particles when it hits the dune, the dune's sand particles will saltate more than if the wind had hit the dune without carrying sand particles.^[34]

Coastal dunes

Newborough Dune Rejuvenation, Wales; video of work done by Natural Resources Wales; 2015

Coastal dunes^[35] form when wet sand is deposited along the coast and dries out and is blown along the beach.^[36] Dunes form where the beach is wide enough to allow for the accumulation of wind-blown sand, and where prevailing onshore winds tend to blow sand inland. The three key ingredients for coastal dune formation are a large sand supply, winds to move said sand supply, and a place for the sand supply to accumulate.^[37] Obstacles—for example, vegetation, pebbles and so on—tend to slow down the wind and lead to the deposition of sand grains.^[38] These small "incipient dunes or "shadow dunes" tend to grow in the vertical direction if the obstacle slowing the wind can also grow vertically (i.e., vegetation). Coastal dunes expand laterally as a result of lateral growth of coastal plants via seed or rhizome.^[39]^[40] Models of coastal dunes suggest that their final equilibrium height is related to the distance between the water line and where vegetation can grow.^[41] Coastal dunes can be classified by where they develop, or begin to take shape. Dunes are commonly grouped into either the Primary Dune Group or the Secondary Dune Group.^[35] Primary dunes gain most of their sand from the beach itself, while secondary dunes gain their sand from the primary dune. Along the Florida Panhandle, most dunes are considered to be foredunes or hummocks.^[42]^[43] Different locations around the globe have dune formations unique to their given coastal profile.

Coastal sand dunes can provide privacy and/or habitats to support local flora and fauna. Animals such as sand snakes, lizards, and rodents can live in coastal sand dunes, along with insects of all types.^[44] Often the vegetation of sand dunes is discussed without acknowledging the importance that coastal dunes have for animals. Further, some animals, such as foxes and feral pigs can use coastal dunes as hunting grounds to find food.^[45] Birds are also known to utilize coastal dunes as nesting grounds. All these species find the coastal environment of the sand dune vital to their species' survival.

Over the course of time coastal dunes may be impacted by tropical cyclones or other intense storm activity, dependent on their location. Recent work has suggested that coastal dunes tend to evolve toward a high or low morphology depending on the growth rate of dunes relative to storm frequency.^[46]^[47] During a storm event, dunes play a significant role in minimizing wave energy as it moves onshore. As a result, coastal dunes, especially those in the foredune area affected by a storm surge, will retreat or erode.^[48] To counteract the damage from tropical activity on coastal dunes, short term post-storm efforts can be made by individual agencies through fencing to help with sand accumulation.^[49]

How much a dune erodes during any storm surge is related to its location on the coastal shoreline and the profile of the beach during a particular season. In those areas with harsher winter weather, during the summer a beach tends to take on more of a convex appearance due to gentler waves, while the same beach in the winter may take on more of a concave appearance. As a result, coastal dunes can get eroded much more quickly in the winter than in the summer. The converse is true in areas with harsher summer weather.^[50]

There are many threats to these coastal communities. Some coastal dunes, for example ones in San Francisco, have been completely altered by urbanization; reshaping the dune for human use. This puts native species at risk. Another danger, in California and places in the UK specifically, is the introduction of invasive species. Plant species, such as Carpobrotus edulis, were introduced from South Africa in an attempt to stabilize the dunes and provide horticultural benefits, but instead spread taking land away from native species. Ammophila arenaria, known as European beachgrass, has a similar story, though it has no horticulture benefits. It has great ground coverage and, as intended, stabilized the dunes but as an unintended side effect prevented native species from thriving in those dunes. One such example is the dune field at Point Reyes, California. There are now efforts to get rid of both of these invasive species.^[51]^[52]

Ecological succession on coastal dunes

As a dune forms, plant succession occurs. The conditions on an embryo dune are harsh, with salt spray from the sea carried on strong winds. The dune is well drained and often dry, and composed of calcium carbonate from seashells. Rotting seaweed, brought in by storm waves adds nutrients to allow pioneer species to colonize the dune. For example, in the United Kingdom these pioneer species are often marram grass, sea wort grass and other sea grasses. These plants are well adapted to the harsh conditions of the foredune, typically having deep roots which reach the water table, root nodules that produce nitrogen compounds, and protected stoma, reducing transpiration. Also, the deep roots bind the sand together, and the dune grows into a foredune as more sand is blown over the grasses. The grasses add nitrogen to the soil, meaning other, less hardy plants can then colonize the dunes. Typically these are heather, heaths and gorses. These too are adapted to the low soil water content and have small, prickly leaves which reduce transpiration. Heather adds humus to the soil and is usually replaced by coniferous trees, which can tolerate low soil pH, caused by the accumulation and decomposition of organic matter with nitrate leaching.^[53] Coniferous forests and heathland are common climax communities for sand dune systems.

Young dunes are called yellow dunes and dunes which have high humus content are called grey dunes. Leaching occurs on the dunes, washing humus into the slacks, and the slacks may be much more developed than the exposed tops of the dunes. It is usually in the slacks that more rare species are developed and there is a tendency for the dune slacks' soil to be waterlogged where only marsh plants can survive. In Europe these plants include: creeping willow, cotton grass, yellow iris, reeds, and rushes. As for vertebrates in European dunes, natterjack toads sometimes breed here.

Coastal dune floral adaptations

Sea dune erosion at Talacre, Wales

Dune ecosystems are extremely difficult places for plants to survive. This is due to a number of pressures related to their proximity to the ocean and confinement to growth on sandy substrates. These include:

Little available soil moisture
Little available soil organic matter/nutrients/water
Harsh winds
Salt spray
Erosion/shifting and sometimes burial or exposure (from shifting)
Tidal influences

Plants have evolved many adaptations to cope with these pressures:

Deep taproot to reach water table (Pink Sand Verbena)
Shallow but extensive root systems
Rhizomes
Prostrate growth form to avoid wind/salt spray (Abronia spp., Beach Primrose)
Krummholz growth form (Monterrey Cypress-not a dune plant but deals with similar pressures)
Thickened cuticle/Succulence to reduce moisture loss and reduce salt uptake (Ambrosia/Abronia spp., Calystegia soldanella)
Pale leaves to reduce insolation (Artemisia/Ambrosia spp.)
Thorny/Spiky seeds to ensure establishment in vicinity of parent, reduces chances of being blown away or swept out to sea (Ambrosia chamissonis)

Gypsum dunes

In deserts where large amounts of limestone mountains surround a closed basin, such as at White Sands National Park in south-central New Mexico, occasional storm runoff transports dissolved limestone and gypsum into a low-lying pan within the basin where the water evaporates, depositing the gypsum and forming crystals known as selenite. The crystals left behind by this process are eroded by the wind and deposited as vast white dune fields that resemble snow-covered landscapes. These types of dune are rare, and only form in closed arid basins that retain the highly soluble gypsum that would otherwise be washed into the sea.^[54]

Nabkha dunes

A nabkha, or coppice dune, is a small dune anchored by vegetation. They usually indicate desertification or soil erosion, and serve as nesting and burrow sites for animals.

Sub-aqueous dunes

Sub-aqueous (underwater) dunes form on a bed of sand or gravel under the actions of water flow. They are ubiquitous in natural channels such as rivers and estuaries, and also form in engineered canals and pipelines.^[55]^[56]^[57] Dunes move downstream as the upstream slope is eroded and the sediment deposited on the downstream or lee slope in typical bedform construction.^[58] In the case of sub-aqueous barchan dunes, sediment is lost by their extremities, known as horns.^[59]^[60]

These dunes most often form as a continuous 'train' of dunes, showing remarkable similarity in wavelength and height. The shape of a dune gives information about its formation environment.^[61] For instance, rivers produce asymmetrical ripples, with the steeper slip face facing downstream. Ripple marks preserved in sedimentary strata in the geological record can be used to determine the direction of current flow, and thus an indication of the source of the sediments.

Dunes on the bed of a channel significantly increase flow resistance, their presence and growth playing a major part in river flooding.

Lithified dunes

A lithified (consolidated) sand dune is a type of sandstone that is formed when a marine or aeolian sand dune becomes compacted and hardened. Once in this form, water passing through the rock can carry and deposit minerals, which can alter the colour of the rock. Cross-bedded layers of stacks of lithified dunes can produce the cross-hatching patterns, such as those seen in Zion National Park in the western United States.

A slang term, used in the southwest US, for consolidated and hardened sand dunes is "slickrock", a name that was introduced by pioneers of the Old West because their steel-rimmed wagon wheels could not gain traction on the rock.^{[citation needed]}

Desertification

Sand dunes can have a negative impact on humans when they encroach on human habitats. Sand dunes move via a few different means, all of them helped along by wind. One way that dunes can move is by saltation, where sand particles skip along the ground like a bouncing ball. When these skipping particles land, they may knock into other particles and cause them to move as well, in a process known as creep. With slightly stronger winds, particles collide in mid-air, causing sheet flows. In a major dust storm, dunes may move tens of metres through such sheet flows. Also as in the case of snow, sand avalanches, falling down the slipface of the dunes—that face away from the winds—also move the dunes forward.

Sand threatens buildings and crops in Africa, the Middle East, and China. Drenching sand dunes with oil stops their migration, but this approach uses a valuable resource and is quite destructive to the dunes' animal habitats. Sand fences might also slow their movement to a crawl, but geologists are still analyzing results for the optimum fence designs.^[62] Preventing sand dunes from overwhelming towns, villages, and agricultural areas has become a priority for the United Nations Environment Programme. Planting dunes with vegetation also helps to stabilise them.

Conservation

Sand blowing off a crest in the Kelso Dunes of the Mojave Desert, California, USA

Dune habitats provide niches for highly specialized plants and animals, including numerous rare species and some endangered species. Due to widespread human population expansion, dunes face destruction through land development and recreational usages, as well as alteration to prevent the encroachment of sand onto inhabited areas. Some countries, notably the United States, Australia, Canada, New Zealand, the United Kingdom, Netherlands, and Sri Lanka have developed significant programs of dune protection through the use of sand dune stabilization. In the U.K., a Biodiversity Action Plan has been developed to assess dunes loss and to prevent future dunes destruction.

Examples

Africa

Alexandria Coastal Dunefields, in the Eastern Cape, South Africa^[63]
Witsand Nature Reserve in the Kalahari Desert, South Africa
The white dunes of De Hoop Nature Reserve, South Africa
The dunes of the Suguta Valley, a desert part of the Great Rift Valley in northwestern Kenya
The dunes of the Danakil Depression, northeastern Ethiopia toward the border with Eritrea
The dunes of Sossusvlei in the greater Namib-Naukluft National Park, Namibia
Chad Basin National Park in northern Nigeria
The coastal dunes of Iona National Park in the southwesternmost part of Angola
Khawa dunes in the Kgalagadi Transfrontier Park, the southwesternmost part of Botswana
La Dune Rose in the city of Gao in northern Mali near the Niger River
Erg Aoukar in southeastern Mauritania extending into Mali
Erg Chech in southwestern Algeria and northern Mali
Erg Chebbi and Erg Chigaga in southern Morocco
Grand Erg Oriental in northeastern Algeria and southern Tunisia
Grand Erg Occidental in western Algeria
The Idehan Ubari and the Idehan Murzuq in southwestern Libya
The Corralejo dunes in the Canary Islands, Spain
The Rebiana Sand Sea in southeastern Libya
The Great Sand Sea in southeastern Libya and southwestern Egypt
The Selima Sand Sheet in northwestern Sudan
The dunes of the Bayuda Desert in northern Sudan
The dunes of the Lompoul Desert in northwestern Senegal
The coastal dunes of Bazaruto Island, Mozambique
Erg du Djourab in northern Chad
The dunes of the Mourdi Depression in northeastern Chad
The dunes of Tin Toumma Desert, in southeastern Niger
Grand Erg de Bilma in the Ténéré, in northern Niger
The dunes of Oursi in the Sahel Region, northern Burkina Faso
Tanzania's Shifting Sands near Olduvai Gorge

Asia

Sunset view dunes in the Alankuda village on Kalpitiya peninsula in Sri Lanka.^[64]
The dunes in the Thar Desert in India and Pakistan
Tottori Sand Dunes, Tottori Prefecture, Japan
Rig-e Jenn in the Central Desert of Iran.
Rig-e Lut in the Southeast of Iran.
The Ilocos Norte Sand Dunes in the Philippines, particularly Paoay Sand Dunes.
Moreeb Dune in Liwa Oasis, United Arab Emirates, used as an arena for drag motor sports and Sandboarding.
Gumuk Pasir Parangkusumo near Parangtritis beach in Yogyakarta, Indonesia.
Mui Ne, Vietnam.
Wahiba Sands, Oman
Teri, red dune complex in southern India
The dunes of the Taklamakan Desert in southwest Xinjiang in Northwest China
Tukulans of the Central Yakutian Lowland, Russia

Oceania

Simpson Desert sand dunes in the Northern Territory, Queensland and South Australia, Australia
Coorong National Park in South Australia, Australia
Lincoln National Park in South Australia, Australia
Coffin Bay National Park in South Australia, Australia
Fraser Island in Queensland, Australia
Cronulla sand dunes in New South Wales, Australia
Stockton Beach in New South Wales, Australia
Lancelin sand dunes in Western Australia, Australia
Te Paki sand dunes near Cape Reinga, New Zealand

World's highest dunes

Note: This table is partially based on estimates and incomplete information.
Dune	Height from Base feet/metres	Height from Sea Level feet/metres	Location	Notes
Duna Federico Kirbus	≈4,035/1,230	≈9,334/2,845	Bolsón de Fiambalá, Fiambalá, Catamarca Province, Argentina	Highest in the world^[73]
Cerro Blanco	≈3,860/1,176	≈6,791/2,080	Nazca Province, Ica Region, Peru 14°52′05″S 74°50′17″W / 14.868°S 74.838°W / -14.868; -74.838 (Cerro Blanco Dune)	Highest in Peru, second highest in the world
Badain Jaran Dunes	≈1,640/500	≈6,640/2,020	Badain Jaran Desert, Alashan Plain, Inner Mongolia, Gobi Desert, China	World's tallest stationary dunes and highest in Asia^[74]
Rig-e Yalan Dune	≈1,542/470	≈3,117/950	Lut Desert, Kerman, Iran	Hottest place on Earth (Gandom Beryan)
Average Highest Area Dunes	1,410/430?	≈6,500/1,980?	Isaouane-n-Tifernine Sand Sea, Algerian Sahara	Highest in Africa
Big Daddy/Dune 7 (Big Mama?)^[75]	1,256/383	≈1,870/570	Sossusvlei Dunes, Namib Desert, Namibia / Near Walvis Bay Namib Desert, Namibia	according to the Namibian Ministry of Environment & Tourism the highest dune in the world
Mount Tempest	≈920/280	≈920/280	Moreton Island, Brisbane, Australia	Highest in Australia
Star Dune	>750/230	≈8,950/2,730	Great Sand Dunes National Park and Preserve, Colorado, USA	Highest in North America
Dune of Pyla	≈345/105	≈699/130	Bay of Arcachon, Aquitaine, France	Highest in Europe
Ming-Sha Dunes	?	5,660/1,725	Dunhuang Oasis, Taklamakan Desert, Gansu, China
Medanoso Dune	≈1805/550	≈5446/1,660	Atacama Desert, Chile	Highest in Chile

Sand dune systems

(coastal dunes featuring succession)

Athabasca Sand Dunes Provincial Park, Alberta and Saskatchewan
Ashdod Sand Dune, Israel
Bamburgh Dunes, Northumberland, England
Bradley Beach, New Jersey
Circeo National Park, a Mediterranean dune area on the southwest coast of the Lazio region of Italy
Cronulla sand dunes, NSW, Australia
Crymlyn Burrows, Wales
Dawlish Warren, Devon, England
Fraser Island, Queensland Australia, largest sand island in the world
Indiana Dunes National Park, Indiana
Kenfig Burrows, Wales
Margam burrows, Wales
Murlough Sand Dunes, Newcastle, Co Down, Northern Ireland
Morfa Harlech sand dunes, Gwynedd, Wales
Newborough Warren, North Wales
Oregon Dunes National Recreation Area, near North Bend, Oregon
Penhale Sands, Cornwall, England
Sleeping Bear Dunes National Lakeshore, Michigan
Sandy Island Beach State Park, Richland, New York
Studland, Dorset, England
Thy National Park, North Denmark Region, Denmark
Winterton, Norfolk, England
Woolacombe, Devon, England
Ynyslas Sand Dunes, Wales

Extraterrestrial dunes

Dunes can likely be found in any environment where there is a substantial atmosphere, winds, and dust to be blown. Dunes are common on Mars and in the equatorial regions of Titan.

Titan's dunes include large expanses with modal lengths of about 20–30 km. The regions are not topographically confined, resembling sand seas. These dunes are interpreted to be longitudinal dunes whose crests are oriented parallel to the dominant wind direction, which generally indicates west-to-east wind flow. The sand is likely composed of hydrocarbon particles, possibly with some water ice mixed in.^[76]

Dunes are a popular theme in science fiction, featuring in depictions of dry Desert planets^[77] appearing as early as the 1956 film Forbidden Planet and Frank Herbert's 1965 novel Dune.^[78]^[79]^[80] The environment of the desert planet Arrakis (also known as Dune) in the Dune franchise^[81] Dune in turn inspired the Star Wars franchise,^[82] which includes prominent theme of dunes on fictional planets such as Tatooine, Geonosis, and Jakku.

Notes

^ Jackson, Julia A., ed. (1997). "Dune [geomorph]". Glossary of geology (Fourth ed.). Alexandria, Virginia: American Geological Institute. ISBN 0922152349.
^ Pavlovic, Noel B. (2005). "Dune system". Encyclopedia of Chicago. Retrieved 15 January 2021.
^ "Sand dunes". Biology fieldwork. Field Studies Council. 2016. Retrieved 15 January 2021.
^ "Dune systems" (PDF). Michigan Department of Environmental Quality. Archived (PDF) from the original on 20 September 2017. Retrieved 15 January 2021.
^ "The dune system". Restoconlife. Parco Nazionale Arcipelago Toscano. 2010. Archived from the original on 25 March 2023. Retrieved 15 January 2021.
^ Jackson 1997, "Dune complex".
^ Jackson 1997, "Dune field".
^ "Erg Landforms". WorldLandForms. Retrieved 13 October 2019.
^ Jackson 1997, "Erg".
^ Jackson 1997, "Sand sea".
^ Jackson 1997, "Slip face".
^ Allaby, Michael, ed. (2008). "Dune slack". A dictionary of geology and earth sciences (Fourth ed.). Oxford: Oxford University Press. ISBN 9780199653065.
^ Thornbury, William D. (1969). Principles of geomorphology (2d ed.). New York: Wiley. pp. 288–302. ISBN 0471861979.
^ ^a ^b Fowler, H.W.; Fowler, F.G. (1984). Sykes, J.B. (ed.). The Concise Oxford Dictionary of Current English (7th ed.). Oxford: Clarendon Press. ISBN 978-0-19-861132-5.
^ Jackson 1997, "Dune [streams]".
^ McClelland, Mac (March 2015). "Slip Sliding Away". Audubon.
^ Rijckaert, Alix (20 November 2009). "Dutch construct dunes against rising seas". The Telegraph. Archived from the original on 11 January 2022. Retrieved 15 January 2021.
^ "Artificial Sand Dunes and Dunes Rehabilitation" (PDF). UNET DTU Partnership. 14 June 2018. Archived (PDF) from the original on 17 November 2019. Retrieved 15 January 2021.
^ The intercolonial telegraph line at Eucla, accessed 1 April 2007.
^ "Dune—Define Dune". Dictionary.com. Dictionary.com, LLC. Retrieved 1 May 2018.
^ M.R. Leeder (6 December 2012). Sedimentology: Process and Product. Springer Science & Business Media. pp. 97–. ISBN 978-94-009-5986-6.
^ F. J. Pettijohn; P. E. Potter; R. Siever (6 December 2012). Sand and Sandstone. Springer Science & Business Media. pp. 346–. ISBN 978-1-4615-9974-6.
^ Jackson 1997, "Draa".
^ ^a ^b ^c ^d "Types of Dunes". U.S. Geological Survey. 29 October 1997. Archived from the original on 14 March 2012. Retrieved 8 March 2012.
^ ^a ^b ^c ^d ^e ^f Mangimeli, John (10 September 2007). "Geology of Sand Dunes". U.S.A. National Park Service. Retrieved 15 January 2021.
^ Radebaugh, Jani; Sharma, Priyanka; Korteniemi, Jarmo; Fitzsimmons, Kathryn E. (2014). "Longitudinal Dunes (or Linear Dunes)". Encyclopedia of Planetary Landforms. pp. 1–11. doi:10.1007/978-1-4614-9213-9_460-2. ISBN 978-1-4614-9213-9.
^ Twidale, C.R. & Campbell, E.M. (2005, revised edition): Australian landforms: understanding a low, flat, arid and old landscape. Rosenberg Publishing. pp. 241–3. ISBN 1 877058 32 7
^ Goudie, Ron Cooke; Andrew Warren; Andrew (1996). Desert geomorphology (2. impr. ed.). London: UCL Press. pp. 395–396. ISBN 978-1-85728-017-3.{{cite book}}: CS1 maint: multiple names: authors list (link)
^ Goudie, Ron Cooke; Andrew Warren; Andrew (1996). Desert geomorphology (2. impr. ed.). London: UCL Press. p. 395. ISBN 978-1-85728-017-3.{{cite book}}: CS1 maint: multiple names: authors list (link)
^ "USGS Landform Glossary" (PDF). United States Geological Survey. Retrieved 3 October 2013.^{[permanent dead link‍]}
^ Warren, A. (December 1971). "Dunes in the Tenere Desert". The Geographical Journal. 137 (4): 458–461. Bibcode:1971GeogJ.137..458W. doi:10.2307/1797141. JSTOR 1797141.
^ Nielson, Jamie; Kocurek, Gary (June 1986). "Climbing Zibars of the Algodones". Sedimentary Geology. 48 (1–2): 1–15. Bibcode:1986SedG...48....1N. doi:10.1016/0037-0738(86)90078-3.
^ ^a ^b Lancaster, N. (1 March 1988). "The development of large aeolian bedforms". Sedimentary Geology. 55 (1–2): 69–89. Bibcode:1988SedG...55...69L. doi:10.1016/0037-0738(88)90090-5.
^ Jiang, Hong; Dun, Hongchao; Tong, Ding; Huang, Ning (15 April 2017). "Sand transportation and reverse patterns over leeward face of sand dune". Geomorphology. 283: 41–47. Bibcode:2017Geomo.283...41J. doi:10.1016/j.geomorph.2016.12.030.
^ ^a ^b Sloss, C. R.; Shepherd, M.; Hesp, P (2012). "Coastal Dunes: Geomorphology". Nature Education Knowledge. 3 (10): 2. Retrieved 15 January 2021.
^ Bird, ECF (1976). Coasts: an introduction to systematic geomorphology. Canberra, Australia: Australian National University Press. ASIN B004750SVK.
^ Goldsmith, Victor (1978). "Coastal Dunes". Coastal Sedimentary Environments. pp. 171–235. doi:10.1007/978-1-4684-0056-4_5. ISBN 978-1-4684-0058-8.
^ Hesp, P. (1989). "A review of biological and geomorphological processes involved in the initiation and development of incipient foredunes". Proceedings of the Royal Society of Edinburgh, Section B: Biological Sciences. 96: 181–201. doi:10.1017/S0269727000010927.
^ Godfrey, P. J. (1 September 1977). "Climate, plant response and development of dunes on barrier beaches along the U.S. east coast". International Journal of Biometeorology. 21 (3): 203–216. Bibcode:1977IJBm...21..203G. doi:10.1007/BF01552874. ISSN 0020-7128. S2CID 85391018.
^ Goldstein, Evan B.; Moore, Laura J.; Vinent, Orencio Durán (8 August 2017). "Lateral vegetation growth rates exert control on coastal foredune "hummockiness" and coalescing time". Earth Surface Dynamics. 5 (3): 417–427. doi:10.5194/esurf-5-417-2017. ISSN 2196-6311.
^ Durán, O.; Moore, L. J. (2013). "Vegetation controls on the maximum size of coastal dunes". Proceedings of the National Academy of Sciences. 110 (43): 17217–17222. Bibcode:2013PNAS..11017217D. doi:10.1073/pnas.1307580110. PMC 3808624. PMID 24101481.
^ Houser, C; Hapke, C; Hamilton, S (15 August 2008). "Controls on coastal dune morphology, shoreline erosion and barrier island response to extreme storms". Geomorphology. 100 (3–4): 223–40. Bibcode:2008Geomo.100..223H. doi:10.1016/j.geomorph.2007.12.007.
^ Claudino-Sales, V; Wang, P; Horwitz, MH (15 March 2008). "Factors controlling the survival of coastal dunes during multiple hurricane impacts in 2004 and 2005: Santa Rosa Barrier Island, Florida". Geomorphology. 95 (3–4): 295–315. Bibcode:2008Geomo..95..295C. doi:10.1016/j.geomorph.2007.06.004.
^ Ronica, D (27 October 2008). "How sand dunes work". HowStuffWorks. Retrieved 4 December 2018.
^ Hill, K. "Dune Habitats". Smithsonian Marine Station. Retrieved 4 December 2018.
^ Durán Vinent, Orencio; Moore, Laura (February 2015). "Barrier island bistability induced by biophysical interactions". Nature Climate Change. 5 (2): 158–162. Bibcode:2015NatCC...5..158D. doi:10.1038/nclimate2474. ISSN 1758-6798.
^ Goldstein, Evan B.; Moore, Laura J. (2016). "Stability and bistability in a one-dimensional model of coastal foredune height". Journal of Geophysical Research: Earth Surface. 121 (5): 964–977. Bibcode:2016JGRF..121..964G. doi:10.1002/2015JF003783. ISSN 2169-9011.
^ Morton, RA (1 May 1976). "Effects of Hurricane Eloise on beach and coastal structures, Florida Panhandle". Geology. 4 (5): 277–80. Bibcode:1976Geo.....4..277M. doi:10.1130/0091-7613(1976)4<277:EOHEOB>2.0.CO;2.
^ Charbonneau, B; Wnek, JP (24 September 2018). "Reactionary fence installation for post-Superstorm Sandy dune recovery". Eartharxiv ePrints. Bibcode:2018EaArX....NTJSCC. doi:10.31223/osf.io/ntjsc. Archived from the original on 30 July 2020. Retrieved 4 December 2018.
^ Maine Sea Grant. "Seasonal changes". Maine Sea Grant College Program. Archived from the original on 5 December 2018. Retrieved 4 December 2018.
^ "Large-scale removal of beachgrass leads to new life for endangered coastal lupine | The Source | Washington University in St. Louis". The Source. 6 February 2018. Retrieved 9 June 2020.
^ "Hottentot Fig Removal & Control | IWS Ltd". Invasive Weed Solutions UK. Retrieved 9 June 2020.
^ Miles, J. (1985). "The pedogenic effects of different species and vegetation types and the implications of succession". European Journal of Soil Science. 36 (4): 571–584. doi:10.1111/j.1365-2389.1985.tb00359.x.
^ "Geology of White Sands". United States National Park Service. Retrieved 20 January 2021.
^ Franklin, E.M.; Charru, F. (2009). "Morphology and displacement of dunes in a closed-conduit flow". Powder Technology. 190 (1–2): 247–251. arXiv:1608.07729. doi:10.1016/j.powtec.2008.04.065. S2CID 93576651.
^ Franklin, E. M.; Charru, F. (2011). "Subaqueous barchan dunes in turbulent shear flow. Part 1. Dune motion". Journal of Fluid Mechanics. 675: 199–222. Bibcode:2011JFM...675..199F. doi:10.1017/S0022112011000139. S2CID 51792324.
^ Cardona Florez, Jorge Eduar; Franklin, Erick de Moraes (2016). "The formation and migration of sand ripples in closed conduits: Experiments with turbulent water flows". Experimental Thermal and Fluid Science. 71: 95–102. arXiv:1608.04792. Bibcode:2016ETFS...71...95C. doi:10.1016/j.expthermflusci.2015.10.017. S2CID 119268350.
^ Prothero, D. R. and Schwab, F., 1996, Sedimentary Geology, pg. 45–49, ISBN 0-7167-2726-9
^ Alvarez, Carlos A.; Franklin, Erick M. (18 December 2017). "Birth of a subaqueous barchan dune". Physical Review E. 96 (6): 062906. arXiv:1712.07162. Bibcode:2017PhRvE..96f2906A. doi:10.1103/PhysRevE.96.062906. PMID 29347350. S2CID 25558699.
^ Alvarez, Carlos A.; Franklin, Erick M. (19 October 2018). "Role of Transverse Displacements in the Formation of Subaqueous Barchan Dunes". Physical Review Letters. 121 (16): 164503. arXiv:1810.11074. Bibcode:2018PhRvL.121p4503A. doi:10.1103/PhysRevLett.121.164503. PMID 30387641. S2CID 53231618.
^ "Ripples". Archived from the original on 1 May 2018. Retrieved 11 January 2018.
^ Grafals-Soto, Rosana (2012). "Effects of sand fences on coastal dune vegetation distribution". Geomorphology. 145–146: 45–55. Bibcode:2012Geomo.145...45G. doi:10.1016/j.geomorph.2011.12.004.
^ "Alexandria Coastal Dunefields". UNESCO World Heritage. Archived from the original on 18 November 2009. Retrieved 11 January 2010.
^ "Sand Dune · 3PF5+CXG, Etalai, Sri Lanka". Sand Dune · 3PF5+CXG, Etalai, Sri Lanka. Retrieved 19 February 2024.
^ "Herring Cove Beach – Cape Cod National Seashore (U.S. National Park Service)". www.nps.gov. Retrieved 29 July 2018.
^ "Race Point Beach – Cape Cod National Seashore (U.S. National Park Service)". www.nps.gov. Retrieved 29 July 2018.
^ "Province Lands Bike Trail – Cape Cod National Seashore (U.S. National Park Service)". www.nps.gov. Retrieved 29 July 2018.
^ Mann, D. H.; Heiser, P. A.; Finney, B. P. (2002). "Holocene history of the Great Kobuk Sand Dunes, Northwestern Alaska" (PDF). Quaternary Science Reviews. 21 (4): 709–731. Bibcode:2002QSRv...21..709M. CiteSeerX 10.1.1.419.8948. doi:10.1016/S0277-3791(01)00120-2. Archived from the original (PDF) on 19 September 2015.
^ Smith, S. & Mark, S. (2006). Alice Gray, Dorothy Buell, and Naomi Svihla: "Preservationists of Ogden Dunes". The South Shore Journal, 1. "Account Suspended". Archived from the original on 13 September 2012. Retrieved 11 June 2012.
^ Smith, S. & Mark, S. (2009). "The Historical Roots of the Nature Conservancy in the Northwest Indiana/Chicagoland Region: From Science to Preservation". The South Shore Journal, 3. "Account Suspended". Archived from the original on 1 January 2016. Retrieved 22 November 2015.
^ Blvd, Mailing Address: 111 E. Kellogg; Paul, Suite 105 Saint; Us, MN 55101 Phone: 651-293-0200 This is the general phone line at the Mississippi River Visitor Center Contact. "Grey Cloud Dunes Scientific and Natural Area - Mississippi National River & Recreation Area (U.S. National Park Service)". www.nps.gov. Retrieved 21 April 2023.{{cite web}}: CS1 maint: numeric names: authors list (link)
^ Rozell, Ned (22 September 2022). "Alaska sand dunes hint at ancient past". University of Alaska Fairbanks. Archived from the original on 7 October 2022. Retrieved 27 July 2024.
^ "Tallest Sand Dunes in the World". Surf the Sand. 9 December 2020. Retrieved 9 December 2020.
^ "Mystery of world's tallest sand dunes solved"—24 November 2004—New Scientist Archived 26 October 2008 at the Wayback Machine
^ Big Mama highest dune Archived 2 September 2009 at the Wayback Machine
^ Peeking Through the Haze: Titan's Surface, part II—The Planetary Society Blog | The Planetary Society Archived 28 April 2007 at the Wayback Machine
^ Touponce, William F. (1988). "Intellectual Background". Frank Herbert. Boston: Twayne Publishers imprint, G. K. Hall & Co. p. 119. ISBN 978-0-8057-7514-3.
^ Wright, Les. "Forbidden Planet (1956)". Culturevulture.net (Internet Archive). Archived from the original on 7 May 2006. Retrieved 7 May 2006.
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^ Michaud, Jon (12 July 2013). "Dune Endures". The New Yorker. Retrieved 27 November 2013.
^ Lynch, Tom; Glotfelty, Cheryll; Armbruster, Karla (2012). The Bioregional Imagination: Literature, Ecology, and Place. University of Georgia Press. p. 230. ISBN 9780820343679.
^ "Star Wars is Dune". D. A. Houdek. Archived from the original on 8 October 2006. Retrieved 1 October 2006.

References

Bagnold, Ralph (2012) [1941]. The Physics of Blown Sand and Desert Dunes. Courier Dover Publications. ISBN 978-0-486-14119-0.

External links

[AGI-dune-1] Jackson, Julia A., ed. (1997). "Dune [geomorph]". Glossary of geology (Fourth ed.). Alexandria, Virginia: American Geological Institute. ISBN 0922152349.

[2] Pavlovic, Noel B. (2005). "Dune system". Encyclopedia of Chicago. Retrieved 15 January 2021.

[3] "Sand dunes". Biology fieldwork. Field Studies Council. 2016. Retrieved 15 January 2021.

[4] "Dune systems" (PDF). Michigan Department of Environmental Quality. Archived (PDF) from the original on 20 September 2017. Retrieved 15 January 2021.

[5] "The dune system". Restoconlife. Parco Nazionale Arcipelago Toscano. 2010. Archived from the original on 25 March 2023. Retrieved 15 January 2021.

[FOOTNOTEJackson1997"Dune_complex"-6] Jackson 1997, "Dune complex".

[FOOTNOTEJackson1997"Dune_field"-7] Jackson 1997, "Dune field".

[8] "Erg Landforms". WorldLandForms. Retrieved 13 October 2019.

[FOOTNOTEJackson1997"Erg"-9] Jackson 1997, "Erg".

[FOOTNOTEJackson1997"Sand_sea"-10] Jackson 1997, "Sand sea".

[FOOTNOTEJackson1997"Slip_face"-11] Jackson 1997, "Slip face".

[12] Allaby, Michael, ed. (2008). "Dune slack". A dictionary of geology and earth sciences (Fourth ed.). Oxford: Oxford University Press. ISBN 9780199653065.

[thornbury-1969-13] Thornbury, William D. (1969). Principles of geomorphology (2d ed.). New York: Wiley. pp. 288–302. ISBN 0471861979.

[oxford-14] Fowler, H.W.; Fowler, F.G. (1984). Sykes, J.B. (ed.). The Concise Oxford Dictionary of Current English (7th ed.). Oxford: Clarendon Press. ISBN 978-0-19-861132-5.

[FOOTNOTEJackson1997"Dune_[streams]"-15] Jackson 1997, "Dune [streams]".

[16] McClelland, Mac (March 2015). "Slip Sliding Away". Audubon.

[17] Rijckaert, Alix (20 November 2009). "Dutch construct dunes against rising seas". The Telegraph. Archived from the original on 11 January 2022. Retrieved 15 January 2021.

[18] "Artificial Sand Dunes and Dunes Rehabilitation" (PDF). UNET DTU Partnership. 14 June 2018. Archived (PDF) from the original on 17 November 2019. Retrieved 15 January 2021.

[19] The intercolonial telegraph line at Eucla, accessed 1 April 2007.

[20] "Dune—Define Dune". Dictionary.com. Dictionary.com, LLC. Retrieved 1 May 2018.

[Leeder2012-21] M.R. Leeder (6 December 2012). Sedimentology: Process and Product. Springer Science & Business Media. pp. 97–. ISBN 978-94-009-5986-6.

[PettijohnPotter2012-22] F. J. Pettijohn; P. E. Potter; R. Siever (6 December 2012). Sand and Sandstone. Springer Science & Business Media. pp. 346–. ISBN 978-1-4615-9974-6.

[FOOTNOTEJackson1997"Draa"-23] Jackson 1997, "Draa".

[USG_Types_of_Dunes-24] "Types of Dunes". U.S. Geological Survey. 29 October 1997. Archived from the original on 14 March 2012. Retrieved 8 March 2012.

[Mangimeli-25] ^ ^a ^b ^c ^d ^e ^f Mangimeli, John (10 September 2007). "Geology of Sand Dunes". U.S.A. National Park Service. Retrieved 15 January 2021.

[seif_terminology-26] Radebaugh, Jani; Sharma, Priyanka; Korteniemi, Jarmo; Fitzsimmons, Kathryn E. (2014). "Longitudinal Dunes (or Linear Dunes)". Encyclopedia of Planetary Landforms. pp. 1–11. doi:10.1007/978-1-4614-9213-9_460-2. ISBN 978-1-4614-9213-9.

[27] Twidale, C.R. & Campbell, E.M. (2005, revised edition): Australian landforms: understanding a low, flat, arid and old landscape. Rosenberg Publishing. pp. 241–3. ISBN 1 877058 32 7

[28] Goudie, Ron Cooke; Andrew Warren; Andrew (1996). Desert geomorphology (2. impr. ed.). London: UCL Press. pp. 395–396. ISBN 978-1-85728-017-3.{{cite book}}: CS1 maint: multiple names: authors list (link)

[29] Goudie, Ron Cooke; Andrew Warren; Andrew (1996). Desert geomorphology (2. impr. ed.). London: UCL Press. p. 395. ISBN 978-1-85728-017-3.{{cite book}}: CS1 maint: multiple names: authors list (link)

[30] "USGS Landform Glossary" (PDF). United States Geological Survey. Retrieved 3 October 2013.^{[permanent dead link‍]}

[31] Warren, A. (December 1971). "Dunes in the Tenere Desert". The Geographical Journal. 137 (4): 458–461. Bibcode:1971GeogJ.137..458W. doi:10.2307/1797141. JSTOR 1797141.

[32] Nielson, Jamie; Kocurek, Gary (June 1986). "Climbing Zibars of the Algodones". Sedimentary Geology. 48 (1–2): 1–15. Bibcode:1986SedG...48....1N. doi:10.1016/0037-0738(86)90078-3.

[Lancaster-33] Lancaster, N. (1 March 1988). "The development of large aeolian bedforms". Sedimentary Geology. 55 (1–2): 69–89. Bibcode:1988SedG...55...69L. doi:10.1016/0037-0738(88)90090-5.

[34] Jiang, Hong; Dun, Hongchao; Tong, Ding; Huang, Ning (15 April 2017). "Sand transportation and reverse patterns over leeward face of sand dune". Geomorphology. 283: 41–47. Bibcode:2017Geomo.283...41J. doi:10.1016/j.geomorph.2016.12.030.

[sloss-etal-2012-35] Sloss, C. R.; Shepherd, M.; Hesp, P (2012). "Coastal Dunes: Geomorphology". Nature Education Knowledge. 3 (10): 2. Retrieved 15 January 2021.

[36] Bird, ECF (1976). Coasts: an introduction to systematic geomorphology. Canberra, Australia: Australian National University Press. ASIN B004750SVK.

[37] Goldsmith, Victor (1978). "Coastal Dunes". Coastal Sedimentary Environments. pp. 171–235. doi:10.1007/978-1-4684-0056-4_5. ISBN 978-1-4684-0058-8.

[Hesp1989-38] Hesp, P. (1989). "A review of biological and geomorphological processes involved in the initiation and development of incipient foredunes". Proceedings of the Royal Society of Edinburgh, Section B: Biological Sciences. 96: 181–201. doi:10.1017/S0269727000010927.

[39] Godfrey, P. J. (1 September 1977). "Climate, plant response and development of dunes on barrier beaches along the U.S. east coast". International Journal of Biometeorology. 21 (3): 203–216. Bibcode:1977IJBm...21..203G. doi:10.1007/BF01552874. ISSN 0020-7128. S2CID 85391018.

[40] Goldstein, Evan B.; Moore, Laura J.; Vinent, Orencio Durán (8 August 2017). "Lateral vegetation growth rates exert control on coastal foredune "hummockiness" and coalescing time". Earth Surface Dynamics. 5 (3): 417–427. doi:10.5194/esurf-5-417-2017. ISSN 2196-6311.

[DuranMoore2013-41] Durán, O.; Moore, L. J. (2013). "Vegetation controls on the maximum size of coastal dunes". Proceedings of the National Academy of Sciences. 110 (43): 17217–17222. Bibcode:2013PNAS..11017217D. doi:10.1073/pnas.1307580110. PMC 3808624. PMID 24101481.

[42] Houser, C; Hapke, C; Hamilton, S (15 August 2008). "Controls on coastal dune morphology, shoreline erosion and barrier island response to extreme storms". Geomorphology. 100 (3–4): 223–40. Bibcode:2008Geomo.100..223H. doi:10.1016/j.geomorph.2007.12.007.

[43] Claudino-Sales, V; Wang, P; Horwitz, MH (15 March 2008). "Factors controlling the survival of coastal dunes during multiple hurricane impacts in 2004 and 2005: Santa Rosa Barrier Island, Florida". Geomorphology. 95 (3–4): 295–315. Bibcode:2008Geomo..95..295C. doi:10.1016/j.geomorph.2007.06.004.

[44] Ronica, D (27 October 2008). "How sand dunes work". HowStuffWorks. Retrieved 4 December 2018.

[45] Hill, K. "Dune Habitats". Smithsonian Marine Station. Retrieved 4 December 2018.

[46] Durán Vinent, Orencio; Moore, Laura (February 2015). "Barrier island bistability induced by biophysical interactions". Nature Climate Change. 5 (2): 158–162. Bibcode:2015NatCC...5..158D. doi:10.1038/nclimate2474. ISSN 1758-6798.

[47] Goldstein, Evan B.; Moore, Laura J. (2016). "Stability and bistability in a one-dimensional model of coastal foredune height". Journal of Geophysical Research: Earth Surface. 121 (5): 964–977. Bibcode:2016JGRF..121..964G. doi:10.1002/2015JF003783. ISSN 2169-9011.

[48] Morton, RA (1 May 1976). "Effects of Hurricane Eloise on beach and coastal structures, Florida Panhandle". Geology. 4 (5): 277–80. Bibcode:1976Geo.....4..277M. doi:10.1130/0091-7613(1976)4<277:EOHEOB>2.0.CO;2.

[49] Charbonneau, B; Wnek, JP (24 September 2018). "Reactionary fence installation for post-Superstorm Sandy dune recovery". Eartharxiv ePrints. Bibcode:2018EaArX....NTJSCC. doi:10.31223/osf.io/ntjsc. Archived from the original on 30 July 2020. Retrieved 4 December 2018.

[50] Maine Sea Grant. "Seasonal changes". Maine Sea Grant College Program. Archived from the original on 5 December 2018. Retrieved 4 December 2018.

[51] "Large-scale removal of beachgrass leads to new life for endangered coastal lupine | The Source | Washington University in St. Louis". The Source. 6 February 2018. Retrieved 9 June 2020.

[52] "Hottentot Fig Removal & Control | IWS Ltd". Invasive Weed Solutions UK. Retrieved 9 June 2020.

[Miles1985-53] Miles, J. (1985). "The pedogenic effects of different species and vegetation types and the implications of succession". European Journal of Soil Science. 36 (4): 571–584. doi:10.1111/j.1365-2389.1985.tb00359.x.

[54] "Geology of White Sands". United States National Park Service. Retrieved 20 January 2021.

[55] Franklin, E.M.; Charru, F. (2009). "Morphology and displacement of dunes in a closed-conduit flow". Powder Technology. 190 (1–2): 247–251. arXiv:1608.07729. doi:10.1016/j.powtec.2008.04.065. S2CID 93576651.

[56] Franklin, E. M.; Charru, F. (2011). "Subaqueous barchan dunes in turbulent shear flow. Part 1. Dune motion". Journal of Fluid Mechanics. 675: 199–222. Bibcode:2011JFM...675..199F. doi:10.1017/S0022112011000139. S2CID 51792324.

[57] Cardona Florez, Jorge Eduar; Franklin, Erick de Moraes (2016). "The formation and migration of sand ripples in closed conduits: Experiments with turbulent water flows". Experimental Thermal and Fluid Science. 71: 95–102. arXiv:1608.04792. Bibcode:2016ETFS...71...95C. doi:10.1016/j.expthermflusci.2015.10.017. S2CID 119268350.

[58] Prothero, D. R. and Schwab, F., 1996, Sedimentary Geology, pg. 45–49, ISBN 0-7167-2726-9

[59] Alvarez, Carlos A.; Franklin, Erick M. (18 December 2017). "Birth of a subaqueous barchan dune". Physical Review E. 96 (6): 062906. arXiv:1712.07162. Bibcode:2017PhRvE..96f2906A. doi:10.1103/PhysRevE.96.062906. PMID 29347350. S2CID 25558699.

[60] Alvarez, Carlos A.; Franklin, Erick M. (19 October 2018). "Role of Transverse Displacements in the Formation of Subaqueous Barchan Dunes". Physical Review Letters. 121 (16): 164503. arXiv:1810.11074. Bibcode:2018PhRvL.121p4503A. doi:10.1103/PhysRevLett.121.164503. PMID 30387641. S2CID 53231618.

[61] "Ripples". Archived from the original on 1 May 2018. Retrieved 11 January 2018.

[62] Grafals-Soto, Rosana (2012). "Effects of sand fences on coastal dune vegetation distribution". Geomorphology. 145–146: 45–55. Bibcode:2012Geomo.145...45G. doi:10.1016/j.geomorph.2011.12.004.

[unesco-alexandriadunes-63] "Alexandria Coastal Dunefields". UNESCO World Heritage. Archived from the original on 18 November 2009. Retrieved 11 January 2010.

[64] "Sand Dune · 3PF5+CXG, Etalai, Sri Lanka". Sand Dune · 3PF5+CXG, Etalai, Sri Lanka. Retrieved 19 February 2024.

[65] "Herring Cove Beach – Cape Cod National Seashore (U.S. National Park Service)". www.nps.gov. Retrieved 29 July 2018.

[66] "Race Point Beach – Cape Cod National Seashore (U.S. National Park Service)". www.nps.gov. Retrieved 29 July 2018.

[67] "Province Lands Bike Trail – Cape Cod National Seashore (U.S. National Park Service)". www.nps.gov. Retrieved 29 July 2018.

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v t e River morphology
Large-scale features	Alluvial plain Drainage basin Drainage system (geomorphology) Estuary Strahler number (stream order) River valley River delta River sinuosity
Alluvial rivers	Anabranch Avulsion (river) Bar (river morphology) Braided river Channel pattern Cut bank Floodplain Meander Meander cutoff Mouth bar Oxbow lake Point bar Riffle Rapids Riparian zone River bifurcation River channel migration River mouth Slip-off slope Stream pool Thalweg
Bedrock river	Canyon Knickpoint Plunge pool
Bedforms	Ait Antidune Dune Current ripple
Regional processes	Aggradation Base level Degradation (geology) Erosion and tectonics River rejuvenation
Mechanics	Deposition (geology) Water erosion Exner equation Hack's law Helicoidal flow Playfair's law Sediment transport List of rivers that have reversed direction
Category

v t e Coastal geography
Landforms	Anchialine pool Archipelago Atoll Avulsion Ayre Barrier island Bay Bight Bodden Brackish marsh Cape Channel Cliff Coast Coastal plain Coastal waterfall Continental margin Continental shelf Coral reef Cove Dune cliff-top Estuary Firth Fjard Fjord Freshwater marsh Fundus Gat Geo Gulf Gut Hapua Headland Inlet Intertidal wetland Island Islet Isthmus Lagoon Machair Mudflat Natural arch Peninsula Reef Ria Salt marsh Shoal Skerry Sound Spit Stack Strait Strand plain Submarine canyon Tidal island Tidal marsh Tide pool Tied island Tombolo Waituna Windwatt
Beaches	Beach cusps Beach evolution Beach ridge Beach wrack Beaches in estuaries and bays Beachrock Coastal morphodynamics Pocket beach Raised beach Recession Shell beach Shingle beach Storm beach Wash margin
River mouths	Debouch Mouth bar River delta mega regressive
Processes	Blowhole Cliffed coast Coastal biogeomorphology Coastal erosion Concordant coastline Current Cuspate foreland Discordant coastline Emergent coastline Feeder bluff Flat coast Graded shoreline Ingression coast Large-scale coastal behaviour Longshore drift Marine regression Marine transgression Raised shoreline Rip current Rocky shore Sea cave Sea foam Shoal peresyp Steep coast Submergent coastline Surf break Surf zone Surge channel Swash Undertow Volcanic arc Wave-cut platform Wave shoaling Wind fetch Wind wave
Management	Accretion Coastal management Integrated coastal zone management Submersion
Related	Bulkhead line Coastal engineering Grain size boulder clay cobble granule gravel pebble sand shingle silt Intertidal zone Littoral zone Physical oceanography Region of freshwater influence River plume
Category

v t e Patterns in nature
Patterns	Crack Dune Foam Meander Parastichy Phyllotaxis Soap bubble Symmetry in crystals Quasicrystals in flowers in biology Tessellation Vortex street Wave Widmanstätten pattern
Causes	Pattern formation Biology Natural selection Camouflage Mimicry Sexual selection Mathematics Chaos theory Fractal Logarithmic spiral Physics Crystal Fluid dynamics Plateau's laws Self-organization
People	Plato Pythagoras Empedocles Fibonacci Liber Abaci Adolf Zeising Ernst Haeckel Joseph Plateau Wilson Bentley D'Arcy Wentworth Thompson On Growth and Form Alan Turing The Chemical Basis of Morphogenesis Aristid Lindenmayer Benoît Mandelbrot How Long Is the Coast of Britain? Statistical Self-Similarity and Fractional Dimension
Related	Pattern recognition Emergence Mathematics and art

v t e Sediment transport
Water	Armored mud ball Coastal sediment transport Fluvial processes Bed load Suspended load Bed material load
Glacial	Glacial flour Glacial outwash Braided river Moraine Esker Drumlin
Hillslope	Soil creep Landslide
Aeolian	Dune