Keuper
/ˈkɔɪpə(r)/noun
mass noun
- Geology a European series of sedimentary rocks of Upper Triassic age, represented in England chiefly by marls and sandstones【地质】考依波（阶）：
as modifier the red Keuper marls.红色考依波泥灰岩。
词源
mid 19th cent. （originally a miners' term）： German.