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wacke

American  
[wak-uh] / ˈwæk ə /

noun

  1. a poorly sorted sandstone containing fragments of rock and minerals in a clayey matrix.


wacke British  
/ ˈwækə /

noun

  1. obsolete any of various soft earthy rocks that resemble or are derived from basaltic rocks

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of wacke

1795–1805; < German: a kind of stone

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

The terms quartz wacke, lithic wacke, and feldspathic wacke are used.

From Textbooks Jan. 1, 2015

Another name for a lithic wacke is greywacke.

From Textbooks Jan. 1, 2015

The quartz arenite and arkose have relatively little silt-clay matrix, while the lithic wacke has abundant matrix.

From Textbooks Jan. 1, 2015

These banks rise in some instances to hills of firm rock, generally wacke.

From The Highlands of Ethiopia by William Cornwallis Harris

In other places the banks are covered by the debris of a slate-clay slightly bituminous, resembling wacke in its mode of disintegrating.

From Narrative of a Second Expedition to the Shores of the Polar Sea by John Franklin

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