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Publication Date
4-1999
Publication Title
Acta Carsologica
Volume Number
28
Issue Number
2
Abstract
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 intercalated by red clays which was deposited on cor- roded/eroded surface of older speleothems. Banded and laminated carbonate rocks are composed of recrystal- lized calcilutite resemble freshwater limestones. Characteristics of 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 in- termediate up to high magnetic values of J n which is caused by the presence of high amount of Fe-minerals. Mean palaeomagnetic directions are for the group of normal palaeomagnetic 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
Keywords
Magnetostratigraphy, Fossil cave, Terra rossa, Speleothem, Kras, Slovenia
Geographic Subject
Kras (Slovenia)
Document Type
Article
Language
English and Slovenian
Identifier
K26-00139
Recommended Citation
Bosak, Pavel; Mihevc, Andrej; and Pruner, Petr, "Cave Fill in the Črnotiče Quarry, SW Slovenia: Palaeomagnetic, Mineralogical and Geochemical Study" (1999). KIP Articles. 29.
https://digitalcommons.usf.edu/kip_articles/29
