Facies and chemostratigraphic characteristic of the transitional Permian and Triassic interval were differentiated by investigating dolomites near the village Brušane (Velebit Mts.) along the road-cut south from Brušane village. Investigated section “Brušane Sy” represents a continuous deposition of carbonates at the P/T boundary interval. All deposits in the vertical column are determined as dolostones. Related to their main micropetrographic features a deposition in a shallow part of carbonate platform was discerned – in subtidal, intertidal and supratidal zones. The sedimentation is characterized by the prevalence of micritic component, the presence of microbial (cyanobacterial) interlayers and fairly preserved fossils: foraminifers, green algae and their spores, gastropods and ostracods. The Upper Permian age of the lower part of the section “Brušane Sy” is confirmed by Permian foraminifers genera. Occasional emerging of the subtidal/intertidal deposits to supratidal condition occurred that has resulted partially with the desiccation and local resedimentation of desiccated lime-mud fragments to subtidal zone. A significant process related to the deposition in the supratidal zone was vadose diagenesis observed in many Permian dolostones. The periodic emergence of the platform was interpreted due to sea-level oscillation. The values of the δ13C, δ18O isotope content resulted in the isotope curve that was compared to the P/TB isotope curve from several world known P/TB localities. A composite isotope curve from Brušane (“Brušane Sy” and “Brušane 2” sections) is missing the extreme negative values pointing to an exact position of P/TB. This can be interpreted as a consequence of the vadose diagenesis observed along almost entire “Brušane Sy” section.