Abstract
Abstract. The origin and classification of landforms denominated as "protalus ramparts" in the scientific literature is a problem that is far from being resolved. The main objective of this contribution is to support a permafrost-related definition of protalus ramparts. If we consider the Alpine framework, protalus ramparts are generally very rare landforms; by contrast, the Alpine periglacial belt is characterised by a large diffusion of talus slopes and talus rock glaciers. The investigations carried out in six sites of the Valais Alps (Switzerland) allow eight major "diagnostic criteria" to be presented that help to define protalus ramparts in Alpine environments and that support the permafrost-related genesis of most of them. The major source of controversy is related to the use of the term protalus rampart to designate both a nivo-gravitational landform (also called "pronival ramparts") and a permafrost-related landform. All the considerations presented here allow an active protalus rampart to be defined simply as a (small) active talus rock glacier.
Subject
Earth-Surface Processes,Anthropology,Geography, Planning and Development,Global and Planetary Change
Reference28 articles.
1. Ballantyne, C. K.: Some observations on the morphology and sedimentology of two active protalus ramparts, Lyngen, northern Norway, Arctic Alpine Res., 19, 167–174, 1987.
2. Ballantyne, C. K.: The Conachair protalus rampart, St Kilda, Scott. Geogr. J., 118, 343–350, https://doi.org/10.1080/00369220218737156, 2002.
3. Ballantyne, C. K. and Benn, D. I.: Glaciological constraints on protalus rampart development, Permafrost Periglac., 5, 145–153, https://doi.org/10.1002/ppp.3430050304, 1994.
4. Barsch, D.: Permafrost in der oberen subnivalen Stufe der Alpen, Geogr. Helv., 24, 10–12, https://doi.org/10.5194/gh-24-10-1969, 1969.
5. Barsch, D.: Schneehaldenmoränen (protalus ramparts), Würzburger Geographische Arbeiten, 87, 257–267, 1993.
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