oasis

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oasis

oasis , an area within a desert where the water table reaches the surface, with enough moisture to permit the growth of vegetation. The water may come up to the surface in springs, or it may collect in mountain hollows. In deserts such as the Sahara, artificial oases have been successfully created by using tube wells, which tap deep sources of groundwater. Oases vary in size, ranging from a pond with a group of date palms to the oasis cities of the deserts of Arabia with extended agricultural cultivation. The ice-free dry valleys of Antarctica are also called oases because they support life surrounded by a barren ice desert.

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"oasis." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. 21 Dec. 2009 <http://www.encyclopedia.com>.

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oasis

A Dictionary of Earth Sciences | 1999 | | Â© A Dictionary of Earth Sciences 1999, originally published by Oxford University Press 1999. (Hide copyright information) Copyright

oasis A fertile spot in the desert, the basis of which is a supply of water that is available throughout the year and which normally originates as groundwater.

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AILSA ALLABY and MICHAEL ALLABY. "oasis." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 21 Dec. 2009 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "oasis." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (December 21, 2009). http://www.encyclopedia.com/doc/1O13-oasis.html

AILSA ALLABY and MICHAEL ALLABY. "oasis." A Dictionary of Earth Sciences. 1999. Retrieved December 21, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-oasis.html

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The Concise Oxford Dictionary of English Etymology | 1996 | | Â© The Concise Oxford Dictionary of English Etymology 1996, originally published by Oxford University Press 1996. (Hide copyright information) Copyright

oasis XVII. — late L. — Gr. óasis, presumably of Egyptian orig.; cf. Coptic ouahe dwelling-place, oasis, f. ouih dwell.

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T. F. HOAD. "oasis." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. 21 Dec. 2009 <http://www.encyclopedia.com>.

T. F. HOAD. "oasis." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. (December 21, 2009). http://www.encyclopedia.com/doc/1O27-oasis.html

T. F. HOAD. "oasis." The Concise Oxford Dictionary of English Etymology. 1996. Retrieved December 21, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O27-oasis.html

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