The aim of the dissertation has been the correlation of the Lower Muschelkalk in the middle and eastern part of the German Basin. The dissertation contents detailed description of the litological sections derived from 6th regions (~600 m thickness). Moreover, it is included interpreted geophysics data of the 16th wells, also. It has been presented, based on a sedimentological cycles in small scale, the new boundaries of the formations common for Polish and German stratigraphy of the Lower Muschelkalk. The method of the handy measure of the natural gamma ray was used during the field works for more detailed interpretation and correlation of the cycles through the whole basin. This method can be use as a control tool as well. The data obtained during the field works was compared with geophysics data from the wells. Author established the 21 cycles in the regions with the different facies development. The cycles can be correlated with each other. The full cycle consists of two semicycles. The lower semicycle represent deepening upward facies, and upper, consequently, shallowing upward. Depends on position within the German Basin one part of the cycle may be missed (full or partly). Thanks to such model it has been able to interpret every cycle in the every regions of the German Basin. Based on precise analysis of the cycles in small scale it was done correlation between the Myophoria Beds and the Gogolin Beds. Mentioned cycles may be interpreted as the high-frequencies sequences or as the parasequences controlled by eustatic changes of the sea level. In the Parasequences Sets was set up some semicycles that build up the full sequences. Within the region of the works was noticed the two full sequences. Moreover, the parts of the next two sequences were recognised in the Myophoria Beds (lower Gogolin Beds) and in the Schaumkalk (Karchowice Beds). Every of established sequences represents around 1 My. It may indicate of sequences of third order.