GREYWACKE


Meaning of GREYWACKE in English

[ 'greɪwakə ]

( US graywacke )

■ noun Geology a dark coarse-grained sandstone containing more than 15 per cent clay.

Origin

C18 (as grauwacke ): from Ger. Grauwacke , from grau 'grey' + wacke .

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.