Record details

    Palaeomagnetic research of a fossil cave in the highway construction at Kozina, SW Slovenia
Statement of responsibility
    Pavel Bosák, Martin Knez, Dana Otrubová, Petr Pruner, Tadej Slabe, Daniela Venhodová
Other titles
    Paleomagnetne raziskave stare jame brez stropa na gradbišču avtoceste pri Kozini (JV Slovenia)
    Papers presented at 8th International Karstological School "CLASSICAL KARST - COLLAPSE DOLINES", Postojna, June 26-29th, 2000 (Variant.)
    Bosák, Pavel, 1951-
    Knez, Martin
    Otrubová, Dana
    Pruner, Petr
    Slabe, Tadej
    Venhodová, Daniela
Source title - serial
    Acta carsologica
    Vol. 29, no. 2
    p. 15-33
    8 obr., 1 fot., 2 tab., 4 s.bibl.
    Zkr. název ser.: Acta carsol. (Ljubljana)
Subject group
    krasová výplň
Geographical name
Abstract (in english)
   A fossil channel was filled by sandy sediments of light brown to ochreous color with dynamic structures and textures (lower sequence) unconformably overlain by remains of collapsed roof with brown and ochreous matrix (upper sequence). The sedimentary profile was about 5 m high. In all 38 samples taken from the profile, only one was cemented. Samples were demagnetised by alternating field (AF) at 10 to 1,000 Oe. The profile, only one was demagnetised by gradual thermal process from 80 to 560°C in the MAVACS apparatus. Detected remannent magnetisation in a natural state varied between 95 and 36,470 pT, values of volume magnetic susceptibility are from 55 to 998 x 10-6 SI. Rocks showed low or medium magnetisation and resulting polarity could not be stated in samples with expressive viscose component (up to 90%).
   According to arrangement of individual magnetozone, it can be stated that sediments are older than the top of Olduvai chron (1.77 Ma), as the magnetostratigraphic profile at Kozina terminated by reverse polarised magnetozone and contain two normal polarised zones. The profile can be correlated with the Divača profile, not only from the palaeomagnetic point of view, but also from a lithological point of view. We suppose, as in Divača, that the cave is a result of the Messinian speleogenetic epoch and its fossilization was connected with rapid base level uplift after refilling of the Mediterranean basin by water. If this hypothesis is close to reality, the fossilization process can be dated from about 5.2 Ma up
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    16. 8. 2007
Import date
    8. 8. 2012