The Germanic Basin (German: Germanisches Becken) is a large region of sedimentation in Western and Central Europe that, during the Permian and Triassic periods, extended from England in the west to the eastern border of Poland in the east.
To the south it is bounded by the Vindelician Ridge (Vindelizische Schwelle) and, to the west and northwest, by the Armorican and London-Brabant Massifs.
But even in these rocks the perimeter regions have marine influences, short incursions of the sea also reached the centre of the basin in northern Germany.
During the Zechstein the sea ingressed from the Arctic Ocean to the north into the basin.
During the Rhaetian stage, new inlets formed in the northwest of the basin through the former highlands in Ireland and Scotland, which came from the Atlantic Ocean which was now opening up.