Record details

    Cave fill in the Črnotice Quarry, SW Slovenia: palaeomagnetic, mineralogical and geochemical study
Statement of responsibility
    Pavel Bosák, Andrej Mihevc, Petr Pruner, Karel Melka, Daniela Venhodová, Anna Langrová
Other titles
    Paleomagnetne, mineralošske in geokemične analize jamskih sedimentov v kamnolomu Črnotiče
    Papers presented at 7th International Karstological School "Roofless Caves", Postojna, 1999 (Variant.)
    Bosák, Pavel, 1951-
    Langrová, Anna
    Melka, Karel
    Mihevc, Andrej
    Pruner, Petr
    Venhodová, Daniela
Source title - serial
    Acta carsologica
    Vol. 28, no. 2
    p. 15-39
    10 obr., 2 fot., 5 tab., 17 bibl.
    Zkr. název ser.: Acta carsol. (Ljubljana)
Subject group
    terra rossa
Geographical name
Abstract (in english)
   A fossil cave, filled with cave sediments was open in the Črnotiče Quarry. An about 1.75 m high section was analysed. Profile consists of banded carbonate rocks interelated by red clays which was deposited on corroded/eorded surface of older speleothems. Banded and laminated carbonate rocks are composed of recrystallized calcilutite resemble freshwater limestones. Characteristics lamination could indicate its origin from organic-rich films. Red clays are composed of quartz, smectite, vermiculite, gibbsite, pM kaolinite, goethite, anatase, rutile, haematite, calcite, micas and feldspar. They contain pellets with Mn hydroxyoxides. That red clays are weathering products redeposited in water-saturated environment. Samples are characterised by intermediate up to high magnetic values of Jn which is caused by the presence of high amount of Fe-minerals.
   Mean paleomagnetic directions are for the group of noraml polarity equal to D=10.6°; I=55.0°, and for the group of reverse polarity than D=173.0°; I=-31.3°. The top part of the profile shows reverse palaeomagnetic direction interrupted by two normal magnetised zones. According to the arrangement of individual magnetozones we assume, that the top of the highest normal polarised magnetozone could be correlated with the Olduvai event (1.76/1.79 Ma) as the youngest possibility, and therefore the rest of profile must be older
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    28. 3. 2008
Import date
    8. 8. 2012