Methodical approaches and results of fluorescent macro and micropetrography of rocks are generalised. It is known that the fluorescence of minerals is caused not by their macroelements, but by impurities (activators). As a result, it is not possible to use fluorescence to identify minerals from different deposits, as activators are different in this case. However, within one deposit, fluorescence is a reliable typomorphic feature, since minerals with these fluorescent characteristics have a single source of formation. The methodical approach discussed is based on a combination of epifluorescent microscopy and multifocal petrography of rocks. Ultraviolet study in reflection mode has a number of advantages, especially when studying disperse sedimentary rocks: improving the resolution of microphotographs, the absence of overlap of microparticles inside the grinding when studying it “for a lumen”. Unlike classical petrography, which uses light from a light source, in ultraviolet petrography, fluorescent minerals themselves emit light, which also increases the resolution of this method. Ultraviolet studies carried out on samples of rocks of supersalt Upper Devonskaya strata of Starobinskoye potassium salt deposit reveal polygenic processes of formation of these rocks. In the composition of terrigenic material of alevrite dimension, minerals with a small and large fluorescence yield are distinguished, which entered the sedimentation pool from different sources. The bulk of mergels, consisting of dispersed calcite and clay minerals, in ultraviolet light demonstrates structures invisible to other methods of sedimentation research — collomorphic aggregate structure, zones of low-temperature metasomatic substitution of margel aggregates associated with the rock fracture system. The fluorescent properties of hydrothermal and chemogenic minerals make it possible to effectively detect these minerals as part of normal sedimentary rocks. An example is borats in salts of evaporite formations. However, a comprehensive approach using X-ray fluorescence and diffractometric analysis is required to determine the mineral variety of such formations.