Meaning & use
Wacke
Last updated
A dark, impure type of sandstone containing a significant amount of clay-sized material.
See it in a sentence
Geologists classified the outcrop as wacke because of its poorly sorted grains.
The old quarry produced blocks of gray wacke used in early stone foundations.
A note on using this word
Borrowed from German mining terminology; it survives in English mainly in the compound 'graywacke'.
Words with a similar meaning
graywacke
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