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Browsing by Subject "stratigraphic study"

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    Item type:Article, Access status: Open Access ,
    Stratygrafia kredy jeziornej ze złoża węgla brunatnego »Szczerców«
    (Wydawnictwa AGH, 2007) Wagner, Marian; Matl, Kazimierz
    Two continuous lacustrine chalk horizons of different age with the total thickness around 90 m were distinguished in the »Szczerców« lignite deposit. The older level (II) occurs in the western part of deposit, particularly in the lower part of a coal complex. The younger level (I and la) is observed in the upper part of the coal complex. The levels are separated by lignite series that is several dozen meters thick. The analysis of malacofauna and palynology confirmed stratigraphic differentiation of the distinguished lacustrine chalk horizons. The older level was described as Lower Miocene that corresponds with Ottnangian and Carpathian in the marine Miocene scheme of Parathetys. Therefore, it is an equivalent to the III-Rawicz Lignite Main Group. The younger level of lacustrine chalk horizons (I) was classified to Middle Miocene and the local upper part of it was assigned to breaching of Middle and Upper Miocene (biostratigraphic zone MN 5-6 that corresponds with Badenian and MN 7-8 that is assigned to Sarmatian). Presumably, it is comparable to the II-Łużyce Lignite Main Group from Polish Lowland.