Podrobnosti záznamu

    Relict rock glaciers in the Central European Mid-Mountains. State-of-the-art
Údaj o odpovědnosti
    Roman Zurawek
Další názvy
    Periglacial Environments: Past, Present and Future, Lódz periglacial symposium, 24-30 September 1999 (Variant.)
    Zurawek, Roman
Zdrojový dokument - seriál
    Biuletyn peryglacjalny
    Vol. 38
    p. 163-192
    4 obr., 9 fot., 1 tab.
    Obsahuje bibliografické odkazy
    Zkr. název ser.: Biul. peryglac.
Předmětová skupina
    glaciální modelace
    kvartér Českého masivu
    ledovec skalní
    periglaciální jevy
    suťový svah
Geografické jméno
    Česká republika
    Hrubý Jeseník
    Polsko - jihozápad
Klíčové slovo
Abstrakt (anglicky)
   Landforms in Central European Mid-Mountains, which already have been defined as relict rock glaciers or, at least, have been suggested to be ones, have been revisited. Following locations have been taken into acount: Mt. Meissner (Germany), Karkonosze Mts. (Czech Republic and Poland), Hrubý Jeseník Mts. (Czech Republic), Sleza Massif (Poland) and Bernese Jura. All these landfroms have been examined for their morphological and, where possible, sedimentological features, which were defined by Barsch (1996b) as diagnostic for relict rock galciers. The comparison shows that none of these landforms fulfill all the criteria required and that there is no single geomorphic characteristic common to all of them. However, they undoubtedly have developed due to slow downslope movement of regolith. The basic question about the role of interstitial ice in their evolution cannot be answered definitively in the light of available sedimentological data.
   On the contrary, micromorphology and dimensions, as well as their geomorphological context to show that most of them required interstitial ice to form and hence, may indeed be called rock glaciers. According to morphology and inferred origin the landforms can be classified into four groups: (1) tongue-shaped rock glaciers, showing relatively distinct morphology that resembles relief of active rock glaciers, (2) embryonic, lobate talus rock glaciers, (3) features, which have possibly developed due to deformation of ice accumulated between blocks and hence, can be called rock glaciers, but do not show any distinct relief; they resemble the "kurum-glaciers" known from Siberia and (4) other landforms, which could be called rock glaciers only if their structure would confirm importance of interstitial ice in their development.
   All the features occur on slopes efficiently remodelled by periglacial processes as testified by distinct microrelief of block covers, or tors or cryoplanation terraces, and have either talus or scree as a source of debris
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
Datum vložení
    11. 6. 2007
Datum importu
    8. 8. 2012