Eolian dust in the coastal desert of the sudan: Aggregates cemented by evaporites

Abstract

Eolian dusts collected after dust storms contain aggregates that are cesmutted by evaporitic salts, mainly halite. They vary in shape, fabrics, and t,:~ ace roughness Aggregation changes grainshape density and size dis--uuti0n ,c ~ ' ' . tran ,,, aust particles (i.e., characteristics determining erosion and inteSp°rt); on deposition in the sea, cements dissolve and aggregates disra:_ grate, leaving the resultant eolo-marine sediment component with a fr~eadlng paleo-climatic record. The eolian transport of salts with dust m the arid coastal plain to the sea constitutes a portion of anticyclic salt movement and probably plays a role in the geochemical balance of the OCeans.

Environmental Characterization of Global Sources of Atmospheric Soil Dust Identified With the Nimbus 7 Total Ozone Mapping Spectrometer (Toms) Absorbing Aerosol Product

“…This wadi is the frequent source of spectacular dust storms. Satellite images (especially SeaWiFS) often show large, intense dust plumes jetting out of the wadi and over the Red Sea (at ∼18.5°N, 38°E) [ Schroeder , 1985]. The dust is generally swept to the south, passing through the narrow straits between Eritrea and Somalia to the west and Yemen to the east into the Gulf of Aden (see section 4.1.5).…”

Aeolian Prokaryotic Communities of the Global Dust Belt Over the Red Sea

“…The Red Sea, the only body of seawater fully contained within the global dust belt region, receives an estimated 6 Mt of dust annually ( Prakash et al, 2015 ) as a consequence of its location between North Africa and the Arabian Peninsula. The intense and periodic dust cover originating in the drylands ( Schroeder, 1985 ) implies that the Red Sea is a major sink for dust and associated aeolian biota suspended within the global dust belt ( Prakash et al, 2015 ). However, it remains unclear what influence – if any – the APC has on the pelagic microbiome of the Red Sea.…”

Arid geomorphology

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The last year has seen the appearance of some important papers on dust (Chester et al, 1985;Foda et al, 1985;Middleton, 1985), salt (Sperling and Cooke, 1985), pans (Lowenstein and Hardie,1985;Goudie and Thomas, 1985) and the Quaternary (Pokras and Mix, 1985;Schroeder, 1985;Wright et al, (1985) in arid lands. This review, however, will concentrate upon dune studies and duricrusts, as a range of significant findings have appeared in these areas.

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Dunes .

When is a linear dune not a longitudinal dune?

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