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The author investigates the possibility of recognizing cyclic stratification with different caprock conditions. The investigations have been carried out using two-dimensional physical models with seismic parameters reflecting those of Ruhr coal seams. Thin, alternating strata raise special seismic problems due to interferences between the primary reflections of the strata boundaries and the short term multiples within and between the strata. Transit time, amplitude, and frequency studies have been carried out on interference signals of single seams and stratified seams with homogeneous caprock. The thickness also of very thin seams can be determined from the amplitudes only in case of single seams. (ERA citation 08:031105)