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dune

From The Columbia Encyclopedia
mound or ridge of wind-blown sand formed in arid regions and along coasts. Dunes are common in most of the great deserts of the world. Often a dune begins to form because material is deposited by the wind as it encounters a bush, a rock, or other obstacle to impede its flow. Dunes that are not stabilized by vegetation have a tendency to migrate, driven by the prevailing wind. These free-moving dunes are of two main kinds, transverse and longitudinal, and the characteristic form is maintained in migration. Transverse dunes usually form where wind blows quite constantly from one direction across expanses of loose sand; the windward slope is typically gentle, and the lee side, where the sand blown over the crest seeks its natural angle of repose, is steep. Such dune ridges have a tendency, especially with increasing distance from the source of sand, to break up into individual small hills. One of the commonest forms of these hills is the symmetrical, crescent-shaped, transverse dune…
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Full text Article Dune

From The Encyclopedia of Tourism and Recreation in Marine Environments
Dunes are topographic features in the form of hills or ridges of unconsolidated granular material (usually sand) created by a wind-controlled system. Dunes form wherever conditions for wind erosion and deposition occur and a suitable supply of sediment is available. Virtually all coastal dune…
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Full text Article dune

From The Columbia Encyclopedia
mound or ridge of wind-blown sand formed in arid regions and along coasts. Dunes are common in most of the great deserts of the world. Often a dune begins to form because material is deposited by the wind as it encounters a bush, a rock, or other obstacle to impede its flow. Dunes that are not…
| 378 words
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Full text Article dune

From The Hutchinson Unabridged Encyclopedia with Atlas and Weather Guide
Mound or ridge of wind-drifted sand, common on coasts and in deserts. Loose sand is blown and bounced along by the wind, up the windward side of a dune ( saltation ). The sand particles then fall to rest on the lee side, while more are blown up from the windward side. In this way a dune moves…
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Full text Article Oregon Dune Mushers' Mail Run

From Cultural Studies: Holidays Around the World
The Oregon Dune Mushers' Mail Run takes place every year, with teams of 4 to 12 dogs in different class groups completing a 75-mile course between North Bend and Florence, OR. Traveling through the Oregon Dunes National Recreation Area, about 15-20 teams take two to three days to complete the run. …
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Full text Article Indiana Dunes

From Britannica Concise Encyclopedia
State park and national lakeshore, southern shore of Lake Michigan , northern Indiana, U.S. The state park (founded 1925) comprises 2,182 acres (883 hectares) of shoreline, marshland, dunes, and forests. At the Big Blowout in the eastern end of the park, lake winds drift sands over a wooded area, …
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Full text Article Dune Pool, 1912 (oil on canvas)

From Bridgeman Images: Christies Collection
Dune Pool, 1912 (oil on canvas)
Artist: Hassam, Childe (1859-1935) Location: Private Collection Credit: Dune Pool, 1912 (oil on canvas), Hassam, Childe (1859-1935) / Private Collection / Photo © Christie's Images / The Bridgeman Art Library Dimensions: 58.5x73.3 Date: 1912 Medium: oil on canvas Description: Dune Pool. Frederick…
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Full text Article Deauville, Les Dunes, (oil on canvas)

From Bridgeman Images: Christies Collection
Deauville, Les Dunes, (oil on canvas)
Artist: Boudin, Eugene Louis (1824-98) Location: Private Collection Credit: Deauville, Les Dunes, (oil on canvas), Boudin, Eugene Louis (1824-98) / Private Collection / Photo © Christie's Images / The Bridgeman Art Library Dimensions: 35.5x58 Medium: oil on canvas Description: Deauville, Les Dunes. …
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Full text Article dune

From The Hutchinson Unabridged Encyclopedia with Atlas and Weather Guide
dune
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Full text Article dune

From The American Heritage Student Science Dictionary
dune
top: sandstone cliff formed from the sand of...
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Full text Article dune

From The American Heritage(R) Dictionary of the English Language
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