Keuper is a sedimentary rock consisting of clays interspersed with fine and thicker gypsum veins. It was formed about 235-231 million years ago. At that time, the Triassic Sea in the Germanic Basin retreated and silted up. Brackish water areas and shallow inland waters formed extensive river systems and alluvial zones. The high CO2 content of the air led to a rich flora and fauna in which dinosaurs roamed. In the dry, warm climate, extensive clay and evaporite pans developed in the interplay between water and desert. Sulphate minerals, the later gypsum, were deposited by circulating supersaturated salt water on layered surfaces and in cracks in the mudstones. The alternating sequence of coloured clay and sulphate rocks formed over millions of years solidified under the pressure of overlying rocks.
Keuper wines have power and fullness, like the opulent marshlands in which the rock was formed. The older the vines, the better this so-called “terroir” can be tasted: subtle fruity notes, a spicy, herbaceous aroma and a full, powerful, mineral taste that lasts a long time.