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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.

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

Huge heaps of lava, having been apparently in strife with the opposite element, are erected on the banks over wacke, or in other cases over a finely-grained soft mart.

From The Highlands of Ethiopia by Harris, William Cornwallis

The newest of these, connected with the higher series of coal- measures, is well exhibited along the shores of the Forth, in Fifeshire, where they consist of basalt with olivine, amygdaloid, greenstone, wacke, and tuff.

From The Student's Elements of Geology by Lyell, Charles, Sir

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.