 Along the Early Jurassic, there was a mostly marginal-marine (mainly mesohaline), deltaic and continental sedimentation that prevailed in the area of Poland.The Marine of Polyhaline character conditions occurred mainly in the Pliensbachian,due to a flooding of the Polish Basin.due to that, Pliensbachian sedimentation in Pomerania developed in a shelf basin
that attained depths of about 100 m, below the storm wave base.