| Titre | Formes et processus géomorphologiques dans le Haut-Atlas marocain | |
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| Auteur | Michel Chardon, Jean Riser | |
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Revue | Revue de Géographie Alpine |
| Numéro | vol. 96, no 4, 1981 | |
| Page | 22 pages | |
| Résumé anglais |
Abstract. — The valley of the oued Ighyghayene (High Atlas, Morocco) offers a wide range of wurmian glacial patterns of a semi- arid mountain. The traces of the wurmian maximum as well as two stages of retreat can be found there. All three are materialised by morainic deposits. Downstream the oued is bordered by two principal levels of terraces of a heavy heterogeneous material. Nevertheless the most original phenomenon is the late-wurmian rock glacier of Aremd. The importance of the accumulation is linked up with the particularly favourable supplying conditions. As a matter of fact, it is situated at the foot of the Northern wall of the Aksoual Mountain with a drop of 2000 m. In the later Pleistocene, the evolution of the slopes is also caracterised by large peri-glacial screes and landslips. At present in the Toubkal Mountain, there is a rock-glacier and many active screes. The action of frost-cracking is particularly vigourous. Source : Éditeur (via Persée) |
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| Article en ligne | https://www.persee.fr/doc/rga_0035-1121_1981_num_69_4_2480 |
