A hamada (Arabic, حمادة "ḥammāda") is a type of
desertlandscape consisting of largely barren, hard, rocky plateaus, with very little sand. [ [http://www2.wwnorton.com/college/geo/earth2/glossary/h.htm#8 Geological dictionary] , definition of a "hamada".] A hamada may sometimes also be called a reg (Pronounced "rej)", though this more properly refers to a stony plain rather than a highland. [ [http://www2.wwnorton.com/college/geo/earth2/glossary/r.htm#21 Geological dictionary] , definition of "reg".]
Hamadas exist in contrast to ergs, which are large areas of shifting
sand dunes. [ [http://www2.wwnorton.com/college/geo/earth2/glossary/e.htm#34 Geological dictionary] , definition of "erg".]
The world's largest hamada is the "Hamada du Draa"Fact|date=March 2007, in the north-west
Sahara desert, between Morocco, Algeriaand Western Sahara. Hamada areas forms 70% of the Sahara desert.Fact|date=March 2007
McKnight, Tom L. and Darrel Hess. "Physical Geography: A Landscape Appreciation", 8th ed., pp. 495-6. Upper Saddle River, NJ: Pearson Education, Inc. 2005. (ISBN 0-13-145139-1)
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