Permian-Triassic mass extinction event took place about 252Ma ago and caused extinction of more than 90% of fauna and flora. Probable triggers were global tectonic events that caused a very strong volcanism in the Siberian Traps area, which in turn has led to a series of other changes that had an impact on the environment, and thus also on the flora and fauna. The thesis comprises fieldwork on the profile Košutnik creek section in the Southern Karavanke. On our profile there are upper Permian gray dolomites and lower Triassic colorful clastic rocks. With X-ray fluorescence (XRF) we determined the variability of individual elements selected at the time of disposal terrigenous sedimentary sequence at the end of the Permian and beginning of Trias. Similar trends showed up in content of silica, aluminum, potassium and titanium, which we can link with increase input of terrigenous material from land to marine sedimentary environment. We've defined exact colors after Munsell for all samples in that profile. Differences in hue are result of digenetic changes that have an influence on both elemental as well as mineral composition of rocks. Hematite gives us reddish hue. By analyzing the X-ray powder diffraction (XRD), we determined both qualitative as well as quantitative mineral for four meters of our profile. Minerals that occur are: calcite, dolomite, quartz, muscovite, and minor levels of potassium feldspar, manganese oxide, hematite and pyrite. The results obtained will be useful for further research of similar sequences in the southern Karavanke (Brsnina) and elsewhere in Slovenia (Idrijca, Masore, Skopačnik...) as well as the correlation of these profiles with each other, as far as detail has not yet been done. The purpose of this research is linking global changes to local trends in layers of upper Permian and lower Triassic age.