noun[mass noun] Geology
- A European series of sedimentary rocks of Upper Triassic age, represented in England chiefly by marls and sandstones: [as modifier]: the red Keuper marlsMore example sentences
- These are the Bunter, Muschelkalk and Keuper formations, which he grouped into the Trias, and today this is called the Triassic System.
- The basins that contain the Keuper formed in part of the Atlantic rift system, where it extends into Europe.
- Well crystallized illite, and chlorite are the most predominant clay minerals in the Keuper rocks, followed in amount by very well crystallized kaolinite, and palygorskite.
mid 19th century (originally a miners' term): German.