| Titre | L'évolution tardiglaciaire et holocène des glaciers et de la végétation autour de l'Alpe d'Huez (Oisans, Alpes Françaises) | |
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| Auteur | Michel Chardon | |
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Revue | Revue de Géographie Alpine |
| Numéro | vol. 79, no 2, 1991 | |
| Page | 15 pages | |
| Résumé anglais |
Tardiglacial and Holocène evolution of glaciers and vegetation in the Alpe d'Huez area (Oisans, French Alps) The limited glaciation of the Rousses massif in the French northern Alps (lat. 45°N) may be explained in terms of the physical parameters of this mountain environment, the highest peak of which is the Pic Bayle (3465 m). Along its southwestern slopes, below the forward ice margins of the present glaciers, can be found several accumulations of glacial moraine. Through the study of pollens found in two post-glacial bogs and carbon 14 dating, it is possible to ascribe them to Tardiglacial and Holocène fluctuations. Since 14 000 BP, the main valleys in this part of the Alps have been free of ice. With the first temperate phases of the Tardiglacial period, alpine grasslands and trees appeared on the slopes between 1800 and 2000 m. During the Atlantic stage, a forest of birches and alders grew on the site of Alpe d'Huez, constituting a transitional belt between the coniferous sub- alpine forest and alpine grasslands. During the Roman period, about 2000 years ago, the forest was destroyed by man and the present land-scape of treeless grasslands became established. Over the past 2000 years, man's impact has been so great that today only the periglacial and glacial areas can be considered as true natural mountain environments. For this reason, the author suggests establishing a nature reserve in the north of the massif. Source : Éditeur (via Persée) |
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| Article en ligne | https://www.persee.fr/doc/rga_0035-1121_1991_num_79_2_3599 |
