Solifluction in the mountains of central Asia: distribution, morphology, processes

Aldar P. Gorbunov and Edward V. Seversky

Permafrost and Periglacial Processes, 1999, vol. 10, issue 1, 81-89

Abstract: The solifluction belt in the Tien Shan and Pamir–Alai varies in width from 900 to 1400 m ASL. Its lower limit lies at about 2500 m in the north and 3800 m in the south. Solifluction processes produce a variety of landforms ranging from large (sheets, streams, terraces) to small (stripes, turf‐banked steps) forms. Movement rates vary from 1–2 mm/a to 300 mm/a. Three mechanisms of movement are distinguished according to the predominance of frost creep, flow or massive sliding. Present‐day, Holocene and Pleistocene solifluction features are recognized. Copyright © 1999 John Wiley & Sons, Ltd. La zone de solifluxion dans le Tien Shan et le Pamir‐Alai est comprise entre 900 et 1400 m d'altitude. Sa limite inférieure se trouve à environ 2500 m dans le nord et 3800 m dans le sud. La solifluxion produit des grandes forme (nappes, coulées, terrasses) et des formes plus petites (stries, banquettes contrôlées par la végétation). Les vitesses des mouvements varient de 1 à 2 mm jusqu'à 300 m par an. Trois mécanismes responsables des mouvements sont distingués à savoir le frost creep, le fluage et les glissements de masse. Des formes dues à la solifluxion actuelle, holocène et pleistocène ont été reconnues. Copyright © 1999 John Wiley & Sons, Ltd.

Date: 1999
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https://doi.org/10.1002/(SICI)1099-1530(199901/03)10:13.0.CO;2-3

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