Mikrofazies, Stratigraphie und Bewertung von Massenbewegungen der Mittel – bis Ober – Jura – Sedimente im Gebiet Wurzerkampl – Rote Wand – Mitterberg (Oberösterreich, Österreich)

Translated title of the contribution: Microfacies, stratigraphy and mass movements of jurassic sediments in the area Mount Wurzerkampl - Mount Rote Wand - Mount Mitterberg (Uppper Austria, Austria)

Reinhold Hiebl

    Research output: ThesisMaster's Thesis

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    Despite a long examination history which can be traced back into the 19. Century the area north to Pyhrnpass (Upper Austria, Austria) was not studied modern except for one work made in 1990 (OTTNER 1990). The area between Mount Wurzerkampl and Mount Rote Wand was mapped once again and the microfacies were analyzed. Some parts of the area had to be interpreted totally new. It was proved that the lagoonal Dachstein limestone is overlaid by an allochthonous unit. The footwall of this unit is represented by a part of a radiolaritic basin of Callovian to Oxfordian age. With the evaporites and siliciclastic sediments on top they were part of the Hallstatt Mélange. This unit is overlaid by gypsum-dominated evaporites which have relevance as raw material. It was mined since 1978. The evaporites are overlaid by the hemipelagic Kimmeridgian to Tithonian Saccocoma-Formation. The succession on Mount Wurzerkampl can be related to the Sandlingalm-Basin. This fact reveals a long-distance-transport of the whole succession. The sediments on Mount Rote Wand and Mount Mitterberg are part of the Plassen-Carbonate-Platform (sensu lato) of Kimmeridgian to Tithonian times. From a sedimentological point of view they are different to the sediments in the type locality because they miss the initial phase of a carbonate platform and the drowning which was dated on Mount Plassen as Berrias. The block is allochthounos. It overthrusted the lagoonal Dachstein Limestone, the Adnet-Formation and maybe parts of the Hallstatt Mélange. The palaogeographic position was in the south of the Plassen-Carbonate-Platform (sensu stricto) or the perhaps Lärchberg Carbonate Platform. The shallow-water sediments on Mount Rote Wand are not related to the sediments on Mount Wurzerkampl. This can be proved by the different components in the sediments and the distinct sediment successions late Late Jurassic. Mass movements can be related to a high angle dipping because of diapirs on Mount Wurzerkampl. This type of massmovements is called rocksplitting. Mass movements are activated by other mechanisms on Mount Rote Wand. They are based on preexistent fault zones combined with a steep morphology and a slope parallel bedding. Big blocks are relieved at the ridges which have a low hazard potential. From a hydrogeological point of view the siliciclastic sediments on top of the Hallstatt Mélange have big relevance in this area. They represent the sealing unit under the raised bog and result in the formation of fountains on the southern slope of Mount Rote Wand. The subsurface drainage is orientated along the general dipping of the layers. Young carstification takes place in the area near to the fault zone on Mount Mitterberg.
    Translated title of the contributionMicrofacies, stratigraphy and mass movements of jurassic sediments in the area Mount Wurzerkampl - Mount Rote Wand - Mount Mitterberg (Uppper Austria, Austria)
    Original languageGerman
    • Gawlick, Hans-Jürgen, Supervisor (internal)
    Award date1 Jul 2011
    Publication statusPublished - 2011

    Bibliographical note

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    • Northern Calcareous Alps
    • Alpine Haselgebirge
    • Stratigraphy
    • Upper Austria

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