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

From Textbooks Jan. 1, 2015

Another name for a lithic wacke is greywacke.

From Textbooks Jan. 1, 2015

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

From Textbooks Jan. 1, 2015

Yet it is by no means apparent that these alone have contributed to form the present surface, the south-eastern side of the field terminating in much older formation of wacke.

From The Highlands of Ethiopia by Harris, William Cornwallis

Passing along the face of the murderous hill, which is of wacke formation, the road descended by several sloping terraces, to the level valley through which the river winds.

From The Highlands of Ethiopia by Harris, William Cornwallis

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