Le matériel de deux édifices dunaires postérieurs au dernier Pluvial (Nord du Mali et Sud-Ouest du Maroc)(Post late-pluvial aeolian dunes in Mali and Morocco)
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1982
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Mots-clés
Sahara ; Quaternaire ; dunesSujets proches
République du Mali Soudan français Soudan français (1890-1902;1920-1959) République soudanaise (1960) Republic of MaliCiter ce document
Geneviève Coudé-Gaussen et al., « Le matériel de deux édifices dunaires postérieurs au dernier Pluvial (Nord du Mali et Sud-Ouest du Maroc)(Post late-pluvial aeolian dunes in Mali and Morocco) », Bulletin de l'Association de Géographes Français, ID : 10.3406/bagf.1982.5304
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Résumé
Aeolian sands were analyzed from km to km along the In Kous- samene erg (Mali) and the Cap Sim (Morocco). They show that. 1 ° With an increase in transport distance from a common source area, the ratio of quartz to shelly limes tone, or quartz to gypsum and clay increases. 2° A part of silt is formed by mechanical reduction of sand-sized marine organisms, clay and gypsum particles during aeolian transport. 3° The setting in motion of dust is very active near the source area of the aeolian sands.