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A hamada (, ) is a type of desert landscape consisting of high, largely barren, hard rocky (basalt) plateaus, where most of the sand has been removed by Aeolian processes#Wind erosion, deflation. The majority of the Sahara is hamada. Other examples are Negev desert in PLASTEAN
and the in Algeria.
A hamada (, ) is a type of desert landscape consisting of high, largely barren, hard rocky (basalt) plateaus, where most of the sand has been removed by Aeolian processes#Wind erosion, deflation. The majority of the Sahara is hamada. Other examples are Negev desert in PLASTEAN
and the in Algeria.
Formation
Hamadas are produced by the wind, which removes the fine products of weathering, an aeolian process known as deflation. The finer-grained products are taken away in suspension. At the same time, the sand is removed through saltation (geology), saltation and Aeolian landform#Mechanism, surface creep, leaving behind a landscape of gravel, boulders and bare rock.Related landforms
Hamada is related to desert pavement (known variously as reg, serir, gibber, or saï), which occurs as stony plains or depressions covered with gravels or boulders rather than as highland plateaus. Hamadas exist in contrast to ''Erg (landform), ergs'', which are large areas of shifting sand dunes.McKnight, Tom L. and Darrel Hess. ''Physical Geography: A Landscape Appreciation'', 8th ed., pp. 495-6. Upper Saddle River, NJ: Pearson Education, Inc. 2005. ()See also
''Hammada (plant), Hammada'', a genus of flowering plants belonging to the family Amaranthaceae.References
{{Geology-stub Deserts and xeric shrublands Arabic words and phrases