 The Main Boreholes show eustatic changes on the marine conditions, with a retreat of the sea level, leading to the appearance of vegetation and abundant pollen on the uppermost parts of the formation.The regressive phase of sea level is represented by the Komorowo Beds and
Upper Slawecin Beds along with the Drzewica Formation.As the level of the sea recovered on the Toarcian, mostly of the setting turn out to be a bathial marine bottom.