Lower Jura base (Lias) in the duck beak

The base surface of the Keuper runs at depths between 1600-6 400 m. The largest depth is measured, in the John Basin, at the border with the Danish North Sea sector. The flattest spot is located directly on the flanks of the salt structure Bruni. The outcrop of the Keuper is determined by a discordance at the base of the Upper Jurassic. In the northwest and in the central area of the duck beak as well as on the Schillgrund-Hoch, the Keuper is not preserved extensively.