In the Carpathian Flysch, coal is present either as exotics of Carboniferous coal deposits or as autochthonous, thin layers of lustrous coal, This paper present the results of the studies of coal-bearing rocks that are coeval with the enclosing flysch sediments. These coals form lenses up to 0.15 m thick. Their morphology precludes an exotic origin. The main petrographic component is collinite with admixtures of poorly fluorescing telinite. Minor components are: exudatinite, sporinite, fusinite, micrinite and sclerotinite. Mineral matter consists of framboidal pyrite clay minerals and quartz. The random reflectance of telocollinite varies from 0.38% to 0.72%, which corresponds to subbituminous and bituminous ranks. Correlation between chemical analysis, coking properties and reflectance measurements, leads to the conclusion that boundary between subbituminous and bituminous coals should be defined by the following values: C = 80wt%; volatiles = 43wt%; calorific value = 32.3 MJ/kg; and R degrees = 0.56-0.57%. Atypical properties, such as: upper C value (75-80wt%); high volatile matter contents (over 43wt%) and low random reflectance (R degrees about 0.38-0.57%) in subbituminous coals; low C value (about 80-82wt%); low reflectance (0.56-0.72%); and good coking properties, of the bituminous coals are attributed to quick coalification during increasing temperature as a result of tectonic stress.