Effect of relative lake-level changes in mire-lake system on the petrographic and floristic compositions of a coal seam, in the Most Basin (Miocene), Czech Republic

► Co-existing lacustrine delta-mire system affected by lake level oscillations ► Progradation of delta mouth bars during low lake level ► Regression of delta mouth bars during lake level rise ► Lake level rise affects ash yield, maceral composition and sporomorphs spectrum. ► Testing of maceral-based facies indices