单词	Keuper
释义	Keuper /ˈkɔɪpə / 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 marls... 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. Origin Mid 19th century (originally a miners' term): German.
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