Podrobnosti záznamu

    Petrology, provenance and shape of clasts in the glaciofluvial sediments of the Mníšek member, northern Bohemia, Czechia
Další názvy
    Petrologie, provenience and tvary klastů glacifluviálních sedimentů mníšeckého členu, severní Čechy, Česko
    Hoare, Peter
    Nývlt, Daniel
Typ dokumentu
    článek v periodiku
Zdrojový dokument - seriál
    Sborník geologických věd. Antropozoikum
    Roč. 27, č. podzim
Výraz tezauru
    Glaciofluvial sediments, clast petrology and provenance, clast shape, northern Bohemia, Czechia
Klíčové slovo
Abstrakt (anglicky)
   Clast petrology, provenance and shape data for the Middle Pleistocene glaciofluvial sand and gravel of the Mníšek member are presented and discussed. The results are compared with those for in situ weathered bedrock debris and recent fluvial sediments from the same area. Clast form is influenced by the petrological and mineralogical properties of the material; the degree of rounding is controlled by length, energy and mode of transport. These findings are at variance with other recent studies. The covariant plot of RA index versus C40 index is the most appropriate tool for the differentiation of glaciofluvial sediments. However, a combination of this type of plot, other covariant plots and linear diagrams yielded good results. The appropriateness of the C40 index for differentiation of actively glacially transported material is illustrated in this study. This work reinforces the need, in studies of the impact of environment on clast shape, to examine resistant and isotropic materials.
    Česká geologická služba
Kód přispěvatele
    ČGS (RIV)
Zdrojový formát
Datum importu
    15. 10. 2014