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Definition of rauhwacke in English:

rauhwacke

Pronunciation /ˈraʊvakə/

noun

(also rauchwacke)
Geology

  • A dolomitic limestone of the Upper Permian or Zechstein group in Germany, corresponding to the magnesian limestone of England; (more generally) a magnesian limestone thought to resemble this.

Origin

Early 19th century; earliest use found in Annals of Philosophy. From German Rauhwacke from rauh (now rau) rough + Wacke.