The problem of the identification of relict rock glaciers on sedimentological evidence

• Autorzy: Żurawek R.
• Języki publikacji: EN

Abstrakty

EN

In order to establish sedimentological criteria for the identification of relict rock glaciers, a study of published information about the internal structure of both active and relict rock glaciers has been carried out. The literature survey revealed that there is no single lithological feature which could independently serve as a proof of the decisive role of ground ice for the transport of rock debris. However, a sequence of a bouldery mantle and a core composed of diamict, together with a layering which dips steeply up-slope are the strongest premises for the elimination of any process other than that associated with a cold environment. Certainly, in attempting to distinguish between a moraine and relict rock glacier, the geo-morphological setting must be taken into account and, notwithstanding this, an effective differentiation is often virtually impossible. Sedimentological parameters such as grain size distribution, sorting and grain morphology are largely controlled by the properties of the source rock and, as such, they are of no value in attempts to identify relict rock glaciers.

Słowa kluczowe

EN

sediments; ground ice; relict rock glaciers

• Wydawca: Stowarzyszenie Geomorfologów Polskich
• Czasopismo: Landform Analysis
• Rocznik: 2003
• Tom: Vol. 4
• Strony: 7--15
• Opis fizyczny: Bibliogr. 60 poz., rys.

Twórcy

autor

Żurawek R.

• University of Wrocław, Geographical Institute PL Uniwersytecki 1, 50-137 Wroclaw 56, Poland

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