greywacke

/ ˈɡreɪˌwækə /

noun

1. any dark sandstone or grit having a matrix of clay minerals

Word History and Origins

Origin of greywacke¹

C19: partial translation of German Grauwacke; see wacke

Example Sentences

Further research revealed that Mr. Greer had worked as a laborer at the fort, and that the slab on his grave was made from greywacke, the same material used in its construction.

From New York Times

Show me an unusual piece of greywacke or a handsome chunk of gabbro and I will regard it with respect and listen politely to what you have to say, but it won’t actually mean anything to me.

From Literature

In Marlborough too, wineries such as Greywacke, Te Whare Ra, Dog Point and Fromm have chipped away at the mold, producing dramatically distinct Sauvignon Blancs that hint at the regional style before departing from it — even Cloudy Bay makes a rich, oak-inflected Sauvignon called Te Koko that bears little resemblance to the wine that launched the region onto the international stage.

From Los Angeles Times

Winemaker Kevin Judd, formerly of Cloudy Bay winery, now makes Sauvignon Blanc under his own Greywacke label.

From Wall Street Journal

It was re-erected on Greywacke Knoll in Central Park in 1881.

From New York Times