The aim of the master's thesis was the stratigraphic and sedimentological description
of two sedimentary outcrops of Upper Triassic Amphiclina beds located in the
Western Pre-Alpine Mountains. The Martinj Vrh outcrop is located south of Železniki
and is part of the Škofjeloško Hills. The Poče outcrop is located on the northern slope
above the village of Poče and is part of the Cerkljansko Hills. The Martinj Vrh outcrop
is located in the southernmost partof the Rut Subnappe, and the Poče outcrop is
located within the Podmelec Subnappe, which are both part of the larger Tolmin
Nappe. In total 50.5 m of the rock sequence were studied in detail in the Martinj Vrh
section and 39 m in the Poče section. The macroscopic and microscopic
sedimentological characteristics of the rock sequence were determined. Siliciclastic
and carbonate rocks alternate in different ratios in the sections. The outcrops differ in
the grain size of the siliciclastic horizons. The mixed sequence indicates carbonate
hemipelagic sedimentation, while the siliciclastic and calcarenitic layers indicate
sedimentation by gravity currents. Synsedimentary faults and folds in the outcrops
are the result of slumping of partially consolidated material from the shelf slope into
the basin environment. The minerals that form the claystones are quartz, orthoclase,
muscovite, illite, albite, kaolinite, calcite and dolomite. Elemental analysis shows that
silicon, aluminium and calcium are the main elements within the rock, followed by
potassium, sodium, magnesium, iron and titanium. Sulfur, phosphorus and
manganese occur in minor amounts. Nine carbonate microfacies and six siliciclastic
microfacies were determined by microfacies analysis. Comparison and correlation
were made with previously published work on the Amphiclina beds and with
siliciclastic rocks deposited on the south-lying Dinaric Carbonate Platform. A number
of
diagenetic changes have been observed within the microfacies groups:
micritization, silicification, carbonatization and the formation of different carbonate
cements, compaction, dolomitization and dedolomitization.
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