FACTOID # 20: Statistically, Delaware bears more cost of the US Military than any other state.
 
 Home   Encyclopedia   Statistics   States A-Z   Flags   Maps   FAQ   About 
 
WHAT'S NEW
RELATED ARTICLES
People who viewed "Dune" also viewed:
 

SEARCH ALL

FACTS & STATISTICS    Advanced view

Search encyclopedia, statistics and forums:

 

 

(* = Graphable)

 

 


Encyclopedia > Dune

In physical geography, a dune is a hill of sand built by aeolian processes. Dunes are subject to different forms and sizes based on their interaction with the wind. Most kinds of dune are longer on the windward side where the sand is pushed up the dune, and a shorter "slip face" in the lee of the wind. The "valley" or trough between dunes is called a slack. A "dune field" is an area covered by extensive sand dunes. Large dune fields are known as ergs. Dune has several meanings: Dune, a sand formation. ... Hills redirects here. ... For other uses, see Sand (disambiguation). ... Issaouane Erg, Algeria. ...


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. Although the most widely distributed dunes are those associated with coastal regions, the largest complexes of dunes are found inland in dry regions and associated with ancient lake or sea beds. For other uses, see Beach (disambiguation). ... This article is about the body of water. ... For other uses, see Lake (disambiguation). ... This article is about the body of water. ...


Dunes also form under the action of water flow (alluvial processes), on sand or gravel beds of rivers, estuaries and the sea-bed. Alluvium is soil land deposited by a river or other running water. ... Gravel (largest fragment in this photo is about 4 cm) Gravel is rock that is of a certain particle size range. ... For other uses, see River (disambiguation). ... For other meanings, see Estuary (disambiguation) Río de la Plata estuary An estuary is a semi-enclosed coastal body of water with one or more rivers or streams flowing into it, and with a free connection to the open sea. ...


The modern word "dune" came into English from French circa 1790 but it's an old Indo-European word that's found in most of the Slavic languages as well as the Germanic and Latin languages. In ancient times words cognate to "dune" probably had the meaning of a citadel or built-up hill fortification.[1] For other uses, see Indo-European. ...

Contents

Conservation

Dune habitats provide niches for highly specialized plants and animals, including numerous rare and endangered species. Due to human population expansion dunes face destruction through recreation and land development, as well as alteration to prevent encroachment on inhabited areas. Some countries, notably the U.S., New Zealand, Great Britain, Australia, Canada and the Netherlands have developed extensive programs of dune protection. In the UK, a Biodiversity Action Plan has been developed to assess dunes loss and prevent future dunes destruction. Rare species is an organism which is very uncommon or scarce. ... The Siberian Tiger is a subspecies of tiger that are critically endangered. ... Map of countries by population density (See List of countries by population density. ... For other uses of terms redirecting here, see US (disambiguation), USA (disambiguation), and United States (disambiguation) Motto In God We Trust(since 1956) (From Many, One; Latin, traditional) Anthem The Star-Spangled Banner Capital Washington, D.C. Largest city New York City National language English (de facto)1 Demonym American... Diademed Sifaka, an endangered primate of Madagascar Biodiversity Action Plan (BAP) is a an internationally recognized programme addressing threatened species or habitats, which is designed to protect and restore biological systems. ...


Dune shapes

Crescentic

Crescent-shaped mounds are generally wider than they are long. The slipface is on the dune's concave side. These dunes form under winds that blow from one direction, and they also are known as barchans, or transverse dunes. Some types of crescentic dunes move faster over desert surfaces than any other type of dune. A group of dunes moved more than 100 meters per year between 1954 and 1959 in the People's Republic of China's Ningxia Province; similar rates have been recorded in the Western Desert of Egypt. The largest crescentic dunes on Earth, with mean crest-to-crest widths of more than 3 kilometers, are in China's Taklamakan Desert. A barchan dune is an arc-shaped sand ridge, comprised of well-sorted sand. ... This article is about arid terrain. ... Dust storm in Taklamakan from space, June 25, 2005 The Taklamakan (also Taklimakan) is a desert of Central Asia, in the Xinjiang Uighur Autonomous Region of the Peoples Republic of China. ...


Linear

Straight or slightly sinuous sand ridges typically much longer than they are wide are known as linear dunes. They may be more than 160 kilometers long. Linear dunes may occur as isolated ridges, but they generally form sets of parallel ridges separated by miles of sand, gravel, or rocky interdune corridors. Some linear dunes merge to form Y-shaped compound dunes. Many form in bidirectional wind regimes. The long axes of these dunes extend in the resultant direction of sand movement.


Star

Radially symmetrical, 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 meters tall and may be the tallest dunes on Earth. The Grand Erg Oriental (also known as the Great Eastern Erg) is an erg in Algeria. ... Issaouane Erg, Algeria. ... The Badain Jaran Desert can be found in western Inner Mongolia. ...


Dome

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


Parabolic

U-shaped mounds of sand with convex noses trailed by elongated arms are parabolic dunes. 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 elongated arms of parabolic dunes follow rather than lead because they have been fixed by vegetation, while the bulk of the sand in the dune migrates forward. Blowouts are sandy depressions caused by removal of material by wind. ...


Longitudinal (Seif) and transverse dunes

Seif dunes.

Longitudinal dunes (also called Seif dunes, after the Arabic word for "sword"), elongate parallel to the prevailing wind, possibly caused by a larger dune having its smaller sides blown away. Seif dunes are sharp-crested and are common in the Sahara. They range up to 300 m (900 ft) in height and 300 km (200 mi) in length. In the southern third of the Arabian Peninsula, a region called the Empty Quarter because of its total lack of populatation, a vast erg called Rub al Khali conatins seif dunes that stretch for almost 200 km and reach heights of over 300m. Image File history File links Seif. ... Image File history File links Seif. ...


Seif dunes are thought to develop from barchans if a change of wind direction occurs. The new wind direction will lead to the development of a new wing and the over development of one of the original wings. If the prevailing wind then becomes dominant for a lengthy period of time the dune will revert to its barchan form, with one exaggerated wing. Should the strong wind then return the exaggerated wing will further extend so that eventually it will be supplied with sand when the prevailing wind returns. The wing will continue to grow under both wind conditions, thus producing a seif dune. On a seif dune the slip face develops on the side facing away from the strong wind, while the slip face of a barchan faces the direction of movement. In the sheltered troughs between highly developed seif dunes barchans may be formed because the wind is unidirectional.


A transverse dune is perpendicular to the prevailing wind, probably caused by a steady buildup of sand on an already existing minuscule mound.


Reversing dunes

Complex dune: Dune 7 in the Namib desert, one of the tallest in the world.
Complex dune: Dune 7 in the Namib desert, one of the tallest in the world.

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. Image File history File links Dune_7_in_the_Namib_Desert. ... Image File history File links Dune_7_in_the_Namib_Desert. ... Dune 7, one of the highest sand dunes in the world (ca. ...


All these dune shapes may occur in three forms: simple, compound, and complex. Simple dunes are basic forms with a 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, and 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 types

The Great Dune of Pyla is the largest dune in Europe.
The Great Dune of Pyla is the largest dune in Europe.

Image File history File linksMetadata Size of this preview: 800 × 600 pixelsFull resolution (1280 × 960 pixel, file size: 320 KB, MIME type: image/jpeg) La Dune du Pyla, à La Teste de Buch dans les Landes de Gascogne, été 2005. ... Image File history File linksMetadata Size of this preview: 800 × 600 pixelsFull resolution (1280 × 960 pixel, file size: 320 KB, MIME type: image/jpeg) La Dune du Pyla, à La Teste de Buch dans les Landes de Gascogne, été 2005. ... Great Dune of Pyla Aerial view of the Great Dune of Pyla The Great Dune of Pyla (French: la dune du Pyla) is the largest sand dune in Europe. ...

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. Dunes move downstream as the upstream slope is eroded and the sediment deposited on the downstream or lee slope. For other uses, see Underwater (disambiguation). ... In physical geography, a channel is the physical confine of a river, slough or ocean strait consisting of a bed and banks. ... For other uses, see Canal (disambiguation). ...


These dunes most often form as a continuous 'train' of dunes, showing remarkable similarity in wavelength and height. For other uses, see Wavelength (disambiguation). ...


Dunes on the bed of a channel significantly increase flow resistance, their presence and growth playing a major part in river flooding. A flood (in Old English flod, a word common to Teutonic languages; compare German Flut, Dutch vloed from the same root as is seen in flow, float) is an overflow of water, an expanse of water submerging land, a deluge. ...


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 hue 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. Lithification (from the Greek word lithos meaning rock and the Latin-derived suffix -ific) is the process whereby sediments compact under pressure, expel connate fluids, and gradually become solid rock. ... This article is about the geological formation. ... Zion Canyon as seen from the top of Angels Landing at sunset Zion National Park is a United States National Park located in the Southwestern United States, near Springdale, Utah. ...


A local slang term used for these consolidated dunes is "slickrock", a name that was introduced by pioneers of the old west because their steel-rimmed wagon wheels could not gain purchase on the rock.


Coastal dunes

Coastal dunes in Curonian spit.
Coastal dunes in Curonian spit.
The fore dune and first yellow dune at Studland, England.

Dunes form where constructive waves encourage the accumulation of sand, and where prevailing onshore winds blow this sand inland. There needs to be obstacles e.g. vegetation, pebbles etc. to trap the moving sand grains. As the sand grains get trapped they start to accumulate, this is the start of dune formation. The wind then starts to affect the mound of sand by eroding sand particles from the windward side and depositing them on the leeward side. Gradually this action causes the dune to “migrate” inland, as it does so it accumulates more and more sand. Dunes provide privacy and shelter from the wind. Image File history File links Download high resolution version (1000x687, 45 KB) The Curonia Spit between Pervalka and Juodkrane. ... Image File history File links Download high resolution version (1000x687, 45 KB) The Curonia Spit between Pervalka and Juodkrane. ... Curonian Spit and Lagoon The Curonian Spit (Lithuanian: KurÅ¡ių Nerija, Russian: Куршская коса, German: Kurische Nehrung) is a 98 km long, thin, curved sand dune peninsula that separates the Curonian Lagoon from the Baltic Sea. ... The 1 and 0 dunes at Studland, Dorset. ... The 1 and 0 dunes at Studland, Dorset. ... Studland is a small village on the Isle of Purbeck in the English county of Dorset. ... For other uses, see England (disambiguation). ... Privacy is the ability of an individual or group to control the flow of information about themselves and thereby reveal themselves selectively. ... For other uses, see Wind (disambiguation). ...


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. These pioneer species are marram grass, sea wort grass and other sea grasses in the UK. These plants are well adapted to the harsh conditions of the fore-dune 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 fore dune 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 heathers and gorses. These too are adapted to the low soil water content and have small, prickly leaves which reduce transpiration. Heathers add humus to the soil, but have a pH of lower than 7, so make the soil slightly acidic. Heathers are usually replaced by coniferous trees which can tolerate the low pH. Coniferous forests and heathland are common climax communities for sand dune systems. Succession is the act or process of pooing or of following in order or sequence. ... A spray of water originating from ocean waves. ... Ascophyllum nodosum exposed to the sun in Nova Scotia, Canada Dead Mans Fingers (Codium fragile) off Massachusetts coast For the band, see; Seaweed (band) For the rock musician, see; Seaweed (musician) Seaweeds are any of a large number of marine benthic algae. ... A pioneer species is a species which colonizes previously uncolonized land, usually leading to ecological succession. ... Species Ammophila arenaria Ammophila breviligulata Marram Grass or Beach Grass is a genus of two species of grass growing almost exclusively on coastal sand dunes, where rhizomes on its extensive root system allow it to survive in a very harsh and windswept ecosystem. ... Cross section showing the water table varying with surface topography as well as a perched water table The water table or phreatic surface is the surface where the water pressure is equal to atmospheric pressure. ... Root nodules occur on the roots of plants that associate with symbiotic bacteria. ... General Name, symbol, number nitrogen, N, 7 Chemical series nonmetals Group, period, block 15, 2, p Appearance colorless gas Standard atomic weight 14. ... Stoma of a leaf under a microscope. ... Transpiration is the evaporation of excess water from aerial parts and of plants, especially leaves but also stems, flowers and fruits. ... General Name, symbol, number nitrogen, N, 7 Chemical series nonmetals Group, period, block 15, 2, p Appearance colorless gas Standard atomic weight 14. ... Heather may be: In botany, the plant Calluna vulgaris, or, more loosely, various species of the closely related genera Erica and Cassiope, low evergreen shrubs (also called heaths). The term is also used to describe land which is vegetated with these plants; In apparel or textiles, interwoven yarns with a... Species Ulex argenteus Ulex boivinii Ulex borgiae Ulex cantabricus Ulex densus Ulex europaeus - Common Gorse Ulex gallii - Dwarf Furze or Furse Ulex genistoides Ulex micranthus Ulex minor - Dwarf Gorse Ulex parviflorus Ref: ILDIS Version 6. ... -1... For other uses, see PH (disambiguation). ... For alternative meanings see acid (disambiguation). ... Orders & Families Cordaitales † Pinales   Pinaceae - Pine family   Araucariaceae - Araucaria family   Podocarpaceae - Yellow-wood family   Sciadopityaceae - Umbrella-pine family   Cupressaceae - Cypress family   Cephalotaxaceae - Plum-yew family   Taxaceae - Yew family Vojnovskyales † Voltziales † The conifers, division Pinophyta, are one of 13 or 14 division level taxa within the Kingdom Plantae. ... For other uses, see PH (disambiguation). ... Heaths are anthropogenic habitats found primarily in northern and western Europe, where they have been created by thousands of years of human clearance of natural forest vegetation by grazing and burning on mainly infertile acidic soils. ... The term climax community, also described as a climatic climax community, is a largely obsolete ecological term for a biological community of plants and animals which, through the process of ecological succession - the development of vegetation in an area over time - has reached a steady state. ...


Young dunes are called yellow dunes, 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 and where only marsh plants can survive. These plants would include: creeping willow, cotton grass, yellow ins, reeds, and rushes. As for the species, there is a tendency for natterjack toads to breed here. Yellow dunes are the dunes that are created after the first set of embryo dunes appear. ... The introduction of this article does not provide enough context for readers unfamiliar with the subject. ...


Desertification

Main article: Desertification
One way of preventing sand from accumulating in roadways is planting trees and vegetation along the road.
One way of preventing sand from accumulating in roadways is planting trees and vegetation along the road.

One of the biggest problems posed by sand dunes is their encroachment on human habitats. Sand dunes move through a few different means, all of them helped along by wind. One way that dunes can move is through saltation, where sand particles skip along the ground like a rock thrown across a pond might skip across the water's surface. When these skipping particles land, they may knock into other particles and cause them to skip as well. With slightly stronger winds, particles collide in mid-air, causing sheet flows. In a major dust storm, dunes may move tens of meters through such sheet flows. And like snow, sand avalanches, falling down the steep slopes of the dunes that face away from the winds, also moving the dunes forward. For the labor union vitiation procedure, see NLRB election procedures#Decertification elections. ... Image File history File linksMetadata No higher resolution available. ... Image File history File linksMetadata No higher resolution available. ... In geology, saltation (from Latin, saltus, leap) refers to a bouncing-like motion when alluvium is dislodged from the streambed, travels in a parabolic path through the stream water, and then impacts back on to the bed. ... “Sandstorm” redirects here. ... A Himalayan avalanche near Mount Everest. ...


Sand threatens buildings and crops in Africa, the Middle East and China. Drenching sand dunes with oil stops their migration, but this approach is highly destructive to the dunes habitat and uses a finite resource. Sand fences might also work, but researchers are still analyzing optimum fence designs. Preventing sand dunes from overwhelming cities and agricultural areas has become a priority for the United Nations Environment Programme. Klaus Töpfer, former UNEP Exec. ...


Examples

Sand dunes of Khongoryn Els, Gurvansaikhan NP, Mongolia.
Sand dunes of Khongoryn Els, Gurvansaikhan NP, Mongolia.

Image File history File links Size of this preview: 800 × 533 pixel Image in higher resolution (1703 × 1135 pixel, file size: 359 KB, MIME type: image/jpeg) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Dune Gobi Gurvansaikhan... Image File history File links Size of this preview: 800 × 533 pixel Image in higher resolution (1703 × 1135 pixel, file size: 359 KB, MIME type: image/jpeg) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Dune Gobi Gurvansaikhan... A ger with the Gurvansaikhan Mountains behind Gobi Gurvansaikhan National Park is a national park in southern Mongolia. ... This article is about Faerûn, a fictional continent, the primary setting of Forgotten Realms Official Material Brief description by Ed Greenwood Categories: Forgotten Realms stubs | Forgotten Realms places ... , Rājasthān (DevanāgarÄ«: राजस्थान, IPA: )   is the largest state of the Republic of India in terms of area. ... Tottori Sand Dunes The Tottori Sand Dunes ) are unique sand dunes located near Tottori City in Tottori Prefecture, HonshÅ«, Japan. ... The Tottori Sand Dunes. ... Kelso Dunes at Mojave National Preserve. ... For the indigenous American tribe, see Mohave. ... This article is about the U.S. state. ... The Sands of Forvie is a designated as a Special Protection Area for wildlife conservation purposes in Aberdeenshire in the North East of Scotland. ... Mid to upper reach of the Ythan Estuary The Ythan Estuary (57 20 30 N, 01 57 30 W) is the tidal component of the Ythan River, emptying into the North Sea approximately 19 kilometers north of Aberdeen, Scotland. ... Logo of Aberdeenshire Council Aberdeenshire (Siorrachd Obar Dheathain in Gaelic) is one of the 32 unitary council areas in Scotland. ... This article is about the country. ... Great Sand Dunes National Park and Preserve became a United States national park on September 13, 2004. ... Official language(s) English Demonym Coloradan Capital Denver Largest city Denver Largest metro area Denver-Aurora Metro Area Area  Ranked 8th in the US  - Total 104,185 sq mi (269,837 km²)  - Width 280 miles (451 km)  - Length 380 miles (612 km)  - % water 0. ... White Sands National Monument is well-known for its fields of white sand dunes composed of gypsum crystals. ... The Rig-e Jenn is a vast area of sand dunes in the middle of Dasht-e Kavir, Irans central desert in the border region of the Semnan and Isfahan provinces. ... Indiana Dunes National Lakeshore, a U.S. national lakeshore, a type of national park, authorized by Congress in 1966, is located in Northwest Indiana. ... Sleeping Bear Dunes National Lakeshore is a U.S. national lakeshore located on the little finger of the lower peninsula of Michigan in Leelanau County and Benzie County. ... Lake Michigan is one of the five Great Lakes of North America, and the only one located entirely within the United States. ... Algodones Dunes The Algodones Dunes are located southeast of the Salton Sea in southern California at the border with Arizona and Baja California, Mexico. ... Brawley is a city located in Imperial County, California. ... The Guadalupe-Nipomo Dunes is the largest remaining dune system south of San Francisco and the second largest in the state of California. ... The Lençóis Maranhenses National Park (Parque Nacional dos Lençóis Maranhenses) is located in Maranhão state, in northeastern Brazil, just east of the Baia de São José, between 02º19’—02º45’ S and 42º44’—43º29’ W. It is an area of low, flat, occasionally... Maranhão is one of the states of Brazil in the north-eastern region. ... Nickname: Location within the state of Texas Country State County Ector Government  - Mayor Larry Melton Area  - City 36. ... Winterton Dunes is an extensive dune system on the east coast of Norfolk, England, which has been designated as a National Nature Reserve. ... Norfolk (pronounced ) is a low-lying county in East Anglia in the east of southern England. ... For other uses, see England (disambiguation). ...

World's highest dunes

Note: This table is based on estimates and incomplete information.
Dune Height from Base feet/meters Height from Sea Level feet/meters Location Notes
Badain Jaran Dunes ~1640/500 ~6640/2,020 Badain Jaran Desert, Alashan Plain, Inner Mongolia, Gobi Desert, China World's Tallest Stationary Dunes [2]
Average Highest Area Dunes 1,526/465? ~6,500/~1,980? Isaouane-n-Tifernine Sand Sea, Algerian Sahara Highest in Africa
Big Daddy/Dune 7 1,256/383  ? Sossusvlei Dunes, Namib Desert, Namibia / Near Walvis Bay Namib Desert, Namibia
Mount Tempest ~920/280 ~920/280 Moreton Bay, 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  ? 4,921/1,500 or 7,923/2,415? Atacama Desert, Chile Highest in South America?

The Badain Jaran Desert can be found in western Inner Mongolia. ... This page contains special characters. ... Dune 7, one of the highest sand dunes in the world (ca. ... Dune 7, one of the highest sand dunes in the world (ca. ... The foreshore at Manly. ... For other uses, see Brisbane (disambiguation). ... Great Sand Dunes National Park and Preserve became a United States National Park by an act of Congress on September 13, 2004. ... Arcachon is a resort town on the Atlantic coast of southwest France. ... Location of Dunhuang Dunhuang (Chinese: , also written as 燉煌 till early Qing Dynasty; Pinyin: ) is a city in Jiuquan, Gansu province, China. ... Atacama redirects here; for the political-administrative region of Chile, see Atacama Region. ...

Sand dune systems

An example of fencing at Studland
(coastal dunes featuring succession)

Image File history File links Gnome-globe. ... Image File history File linksMetadata Size of this preview: 800 × 600 pixelsFull resolution (2048 × 1536 pixel, file size: 1. ... Image File history File linksMetadata Size of this preview: 800 × 600 pixelsFull resolution (2048 × 1536 pixel, file size: 1. ... Ashdod Nitzanim Sand Dune Park is a psammosere ecosystem located close to the city of Ashdod on the Israeli Coastal Plain near the Mediterranean sea. ... Kenfig (Welsh: ) is a village, in former times a municipal borough, lying on Swansea Bay north of Porthcawl, south Wales. ... Approximate extent of South East Wales. ... Approximate extent of South East Wales. ... Studland is a small village on the Isle of Purbeck in the English county of Dorset. ... Dorset (pronounced DOR-sit or [dÉ”.sÉ™t], and sometimes in the past called Dorsetshire) is a county in the south-west of England, on the English Channel coast. ... For other uses, see England (disambiguation). ... WGS-84 (GPS) Coordinates: , Statistics Province: Ulster County: District: Down UK Parliament: South Down European Parliament: Northern Ireland Dialling Code: 028, +437 Post Town: Newcastle Postal District(s): BT33 Population (2001) 7,444 View from main street in Newcastle towards Slieve Donard, the highest peak of the Mourne Mountains. ... Statistics Province: Ulster County Town: Downpatrick Area: 2,448 km² Population (est. ... Northern Ireland (Irish: , Ulster Scots: Norlin Airlann) is a constituent country of the United Kingdom lying in the northeast of the island of Ireland, covering 5,459 square miles (14,139 km², about a sixth of the islands total area). ... The Dune systems at Morfa Harlech, Wales, U.K. have formed relatively recently - in the last 800 years or so, as when Harlech Castle was built it was on the coast. ... This article is about the county of Wales. ... Approximate extent of North Wales North Wales (known in some archaic texts as Northgalis) is the northernmost unofficial region of Wales, bordered to the south by Mid Wales. ... Approximate extent of North Wales North Wales (known in some archaic texts as Northgalis) is the northernmost unofficial region of Wales, bordered to the south by Mid Wales. ... Bamburgh Dunes are an region of coastal sand dunes with an area of of over 40 hectares situated around the village of Bamburgh in Northumberland, England at grid reference NU188350. ... Northumberland is a county in the North East of England. ... The Oregon Dunes National Recreation Area (or NRA) is located on the Oregon Coast of the Coos River, ranging along approximately 40 miles from North Bend, OR, to the Siuslaw River, in Florence, OR. The dunes are within Honeyman State Park. ... North Bend is the name of several places in the United States of America: North Bend, Ohio North Bend, Oregon North Bend, Washington This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... This article is about the U.S. state. ... For the football club, see S.S. Lazio Lazio (Latium in Latin) is a regione of central Italy, bordered by Tuscany, Umbria, Abruzzi, Marche, Molise, Campania and the Tyrrhenian Sea. ... Norfolk (pronounced ) is a low-lying county in East Anglia in the east of southern England. ... For other uses, see England (disambiguation). ... This article is about the country. ... Sleeping Bear Dunes National Lakeshore is a U.S. national lakeshore located on the little finger of the lower peninsula of Michigan in Leelanau County and Benzie County. ... This article is about the U.S. State. ...

Extraterrestrial dunes

See also: List of extraterrestrial dune fields

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 have also been observed in the equatorial regions of Titan by the Cassini probe's radar. This is a list of dune fields not on Earth which have been given official names by the International Astronomical Union. ... Mars is the fourth planet from the Sun in the solar system, named after the Roman god of war (the counterpart of the Greek Ares), on account of its blood red color as viewed in the night sky. ... Titan (, from Ancient Greek Τῑτάν) or Saturn VI is the largest moon of Saturn and the only moon known to have a dense atmosphere. ... This is an artists concept of Cassini during the Saturn Orbit Insertion (SOI) maneuver, just after the main engine has begun firing. ...


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.[1]


Images

References

The Physics of Blown Sand (1941) is a non-fiction book, written by Ralph A. Bagnold, which discusses sand dunes in the Libyan Desert. ... Ralph A. Bagnold (April 3, 1896 - May 28, 1990), during World War II, was the founder and first commander of the British Armys Long Range Desert Group. ... NASA Earth Observatory is an online publication of NASA where the public can access satellite imagery and scientific information about our planet for free. ... Year 2006 (MMVI) was a common year starting on Sunday of the Gregorian calendar. ... is the 118th day of the year (119th in leap years) in the Gregorian calendar. ...

Footnotes

External links

See also

Wikimedia Commons has media related to:
Dune
A barchan dune is an arc-shaped sand ridge, comprised of well-sorted sand. ... Earth science (also known as geoscience, the geosciences or the Earth Sciences), is an all-embracing term for the sciences related to the planet Earth. ... A landform comprises a geomorphological unit. ... The machair on Berneray, Outer Hebrides The Scottish Gaelic word machair or machar refers to a fertile low-lying raised beach found on the coasts of Ireland and Scotland, in particular the Outer Hebrides. ... Masseira is a unique form of traditional farming technique practised in the parishes of Estela and Aguçadoura in the north of Póvoa de Varzim in Portugal, and in the neighbouring parish of Apúlia in Esposende. ... A sandhill is an ecological community type found in the southeastern coastal plain of North America. ... There are very few or no other articles that link to this one. ... Singing sand dunes, an example of the phenomenon of musical sand, produce a sound described as roaring, booming, squeaking, or the Song of Dunes. ...

  Results from FactBites:
 
Classic Dune (85 words)
Frank Herbert's Dune series is one of the grandest epics in the annals of imaginative literature.
DUNE and the additional five novels will also be reissued in paperback, with a distinctive and "upscale" new look.
To learn about the origins of Dune, read Dune Genesis by Frank Herbert.
Dune (novel) - Wikipedia, the free encyclopedia (4580 words)
Dune is a science fiction novel written by Frank Herbert and published in 1965.
Dune spawned five sequels written by Herbert, and inspired a film adaptation by David Lynch, a mini-series made by the Sci Fi Channel (United States), computer games, and a series of prequels co-written by Brian Herbert, the author's son, and Kevin J. Anderson.
Dune is set far in the future amidst a sprawling feudal intergalactic empire where planetary fiefdoms are controlled by noble Houses that owe allegiance to the Imperial House Corrino.
  More results at FactBites »

 
 

COMMENTARY     


Share your thoughts, questions and commentary here
Your name
Your comments

Want to know more?
Search encyclopedia, statistics and forums:

 


Press Releases |  Feeds | Contact
The Wikipedia article included on this page is licensed under the GFDL.
Images may be subject to relevant owners' copyright.
All other elements are (c) copyright NationMaster.com 2003-5. All Rights Reserved.
Usage implies agreement with terms, 1022, m