Environmental Studies

A Dictionary of Ecology A Dictionary of Earth Sciences Further reading

draa

A Dictionary of Ecology | 2004 | | Copyright

draa A high (more than 300 m) sand ridge or chain of dunes in the Sahara, lying about 0.5–5 km from its nearest neighbour and moving at 2–5 cm per year. It is the largest land-form of the erg or sand desert. A star-shaped dune, or ‘rhourd’, is developed at the site where two draa chains cross.

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MICHAEL ALLABY. "draa." A Dictionary of Ecology. 2004. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "draa." A Dictionary of Ecology. 2004. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1O14-draa.html

MICHAEL ALLABY. "draa." A Dictionary of Ecology. 2004. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-draa.html

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draa

A Dictionary of Earth Sciences | 1999 | | Copyright

draa High (more than 300 m) sand ridge or chain of dunes in the Sahara, lying about 0.5–5 km from its nearest neighbour and moving at 2–5 cm per year. It is the largest land-form of the erg, or sand desert. A star-shaped dune, or ‘rhourd’, is developed at the site where two draa chains cross.

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Pick a style below, and copy the text for your bibliography.

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AILSA ALLABY and MICHAEL ALLABY. "draa." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "draa." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1O13-draa.html

AILSA ALLABY and MICHAEL ALLABY. "draa." A Dictionary of Earth Sciences. 1999. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-draa.html

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