Contemporary evolution of the natural environment of the region between Antiatlas and Sahara (Morocco)
Skiba S., Krzemień K. (red.), 2008, Contemporary evolution of the natural environment of the region between Antiatlas and Sahara (Morocco), Prace Geograficzne, z. 118.
Język publikacji: angielski
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Morphostructural and geomorphological outline of Morocco
Recent erosion measurements in Morocco
Physical geography of the Coude du Dra region
Soils of the southern part of Morocco
Properties of the desert soils of the Mhamid area
Reasons for development of the dune fields in the Coude du Dra region
Extorted forms of aeolian accumulation in the Coude du Dra region
The source of the Aeolian sediments in the Coude du Dra region
Surface features of sand grains from the Coude du Dra region (Morocco)
Summary: The analysis of grain surface character, especially of quartz grains, allows to obtain precious information on environmental conditions which shaped the grains and thus can inform about the sediment source. Results of such an analysis performed on grains from the dunes of the Coude du Dra erg showed that the grains underwent heavy chemical weathering processes such as dissolution and re-precipitation of silica on the grain surfaces. This is inferred from intensive crusting of the grains. Only limited amount of the grains exhibits effects of aeolian abrasion. Majority of the grains is angular or sub-angular and only few grains are well or very well rounded. This shows that the sediment was not transported for a long distance and the sediment source for this growing erg is local. Only very few grains which are very well rounded can represent another sediment source.
Słowa kluczowe (w języku angielskim): dune sediments, grain surface character, surface crusting.
Prace Geograficzne, 2008, z. 118, s. 93-102.
Instytut Geografii i Gospodarki Przestrzennej UJ
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Ostatnia aktualizacja: 2017-12-08