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How to Pronounce Graywacke: Learn how to pronounce Graywacke in English correctly

Learn how to say Graywacke correctly in English with this tutorial pronunciation video.

Oxford dictionary definition of the word greywacke:

[mass noun] Geology
a dark coarse-grained sandstone containing more than 15 per cent clay:
a 120-foot pyramid of battered greywacke a quarter mile offshore
[count noun]:
the shales and greywackes of the Skiddaw Group
late 18th century (as grauwacke): from German Grauwacke, from grau ‘grey’ + wacke. The anglicized form dates from the early 19th century