Le role des processus morphogeniques contemporains dans le modelage de massif volcanique des Monts Dore (Massif Central)

• Autorzy: Kazimierz Krzemień , Krzysztof Sobiecki

Warianty tytułu

The Role of Contemporary Morphogenetic Processes in Shaping of the Monts Dore Volcanic Massif in the Massif Central, France

• Języki publikacji: FR

Abstrakty

EN

The paper presents results of the research on contemporary morphogenetic processes in the Monts Dore massif in the French Massif Central. Materials on the topic have been gradually collected and processed since 1985, thanks to direct cooperation between the Jagiellonian University's Institute of Geography and Spatial Economy and the Institute of Geography of the University Blaise Pascal of Clermont-Ferrand. The research area is a typical high-mountain géomorphologie system reaching :he altitude of 1886 m and meeting the criteria of Alpine type mountains by C. Troll (1973). This paper aims to define the role of contemporary morphogenetic processes in shaping of high-mountain glacier-free les Monts Dore massif located in the temperate zone and marine climate. Along a number of subsequent generations of old relief forms discerned in the topography of the Monts Dore, made stable by vegetation, there are some fresh ones, such as niches, chutes and rubble-flow spouts. The main groups of those forms originated at some stage of the Holocene age and have continued to develop until the present time. The morphodynamic role of certain processes may, however, increased as a result of human activity. At the crio-nival stage of the Monts Dore, the principal process is that of nivation processes linked to long-lasting patches of snow. Secondary are cryogenic processes and deflation. Pipkrakes (ice-fibres) plays a particularly important role. And finally, runoff in the form of rill-wash and rouble-wash plays a part too. In recent years, the role of all these natural processes increased due to a deterioration of the vegetation cover. Following géomorphologie mapping of the summit part of the massif it can be ascertained that the periglacial morphogenesis of the area during late Glacial Age was the most effective. Later, during the Holocene Age, the area was shaped by nivation and runoff. During the last 30 years, the area experienced a period of extensive transformation as a result of human activity, as well as erosion and deposition. This period is comparable in terms of scale to the periglacial morphogenetic stage. Nival niches were found to be the dominant land feature of various relief generations. Since these forms are of varied size, the nivation processes seem to have played a very important role in the shaping of the locarmorphology. It can therefore be said that the Monts Dore is a typical high-mountain area with nival morphology dominant above the tree line. This morphology type could be named after the massif the Monts Dore Type. This type could complement the various high-mountain morphology classifications proposed by other geomorphologists. The "Monts Dore" land relief can also be found elsewhere in the other parts of Massif Central, e.g. at Cantal and Mezanc, as well as in Scotland (Cairngorm). (original abstract)

Słowa kluczowe

EN

Geomorphology; Geology; Regional geography

PL

Geomorfologia; Geologia; Geografia regionalna

• Czasopismo: Prace Geograficzne / Instytut Geografii i Gospodarki Przestrzennej Uniwersytetu Jagiellońskiego
• Rocznik: 2004
• Numer: z. 113 Les transformations du milieu montagnard-Carpates, Massif central et autres montagnes d'Europe
• Strony: 11--25

Twórcy

autor

Kazimierz Krzemień

• Jagiellonian University in Krakow, Poland

autor

Krzysztof Sobiecki

• Jagiellonian University in Krakow, Poland

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