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subgraywacke. In DICTIOUS you will not only get to know all the dictionary meanings for the word
subgraywacke, but we will also tell you about its etymology, its characteristics and you will know how to say
subgraywacke in singular and plural. Everything you need to know about the word
subgraywacke you have here. The definition of the word
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English
Etymology
From sub- + graywacke.
Noun
subgraywacke (countable and uncountable, plural subgraywackes)
- (mineralogy) The most common type of sandstone, intermediate in composition between orthoquartzite and graywacke, typically composed of 30% to 65% quartz and chert, less than 15% clay matrix, more than 25% unstable materials such as feldspar grains and rock fragments, and voids or mineral cement exceeding the amount of clay matrix, and being lighter colored and better sorted, and with less matrix, than graywacke.
References
- United States Bureau of Mines, Dictionary of Mining, Mineral, and Related Terms (1996).