Podrobnosti záznamu

    Zur Stratigraphie und Fazies autochtoner und allochtoner Tertiär-Ablagerungen im Raum Schirnding (Oberpfalz)
Údaj o odpovědnosti
    Harald G. Dill
    Dill, Harald G.
Zdrojový dokument - seriál
    Geologische Blätter für Nordost-Bayern
    Jg. 48, Nr. 1-3
    4 obr., 1 tab., 1 pl., 2 s.bibl.
    Anglické resumé
    Zkr. název ser.: Geol. Bl. Nord-Ost Bayern.
Předmětová skupina
    alkalický bazalt
    chebská pánev
    sedimentace fluviální
    uhlí hnědé
Geografické jméno
    Schirnding (SRN-Bayern)
Klíčové slovo
Abstrakt (anglicky)
   Lignite-bearing tertiary sediments are very widespread in the northern part of the Czech Republic and extend across the border into NE Bavaria. In the environs of Schirnding claystones and limestones and lignites of these Tertiary series are currently quarried, forming the basis for the production of ceramics. The graben containing these late Tertiary sediments subsided into crystalline rocks, which were pervasivley altered during the early Tertiary. Siallitic weathering gave rise to a saprolite as much as 60 m thick, which based upon its phyllosilicate assemblage may be subdivided into a lower section with dominantly white mica and an upper section with kaolinite and illite-muscovite. Part of the "Pre-Lignite Beds" resting unconformably upon this weathering loam originated from reworking of the upper saprolite. Another part of this series is made up of gravelly channel deposits gullying into the loamy substrate.
   The "Lignite Beds" reflect deposition in an environment along a transect from mudflats at the basin edge through coal swamps into combustible shales deposited most basinward. Based upon palynological studies a lower to middle Miocene age of formation may be assigned to the coal bogs in the area under study. The passage from the the "Lignite Beds" up into the "Post-Lignite Beds" mirrors a transition from a wet into a dry fan with mudflats and minor fluvial deposits. Notably, volcaniclastic interbeds and altered fragments of alkali-olivine basalts are very widespread in the upper Miocene sedimentary rocks. The sequence of late Tertiary sedimentary rocks records aprograding fan with an intervening period of deposition under more quiescent conditions
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
Datum vložení
    28. 3. 2008
Datum importu
    8. 8. 2012