Tectonic and hydrogeological interpretation of the eastern branch of the Ljubljanica river. New approach to understanding underground water flow in karstic rocks during the transition between prekarstic and karstic phase. Analysis of late Cenozoic tectonic deformation in central Slovenia and its role in post-collisional processes between the Adriatic microplate and the Eurasian plate. New determination of the age of bone beds in Potočka zijalka cave, hypotesis about the existence of at least two late Pleistocene subspecies of the cave bear. Determinations of age and facial characteristics of strata with nanoplankton. Determination of geochemical properties of rocks during the weathering process and determining properties of source rocks from the geochemical composition of the soil. Research of composition, morphology and genesis of minerals, determinations of their formation temperatures, and of the influence of chemical composition and conditions of formation on crystall morphology.