Definition, Meaning & Synonyms

graywacke

Noun

/ˈɡreɪˌwæk/

Definition

A type of coarse-grained sandstone containing a mix of minerals and rock fragments.

Examples

Graywacke is often found in mountainous regions.
The geologist explained how graywacke forms under high-pressure conditions.
In our field trip, we collected samples of graywacke to analyze its mineral composition.

Meaning

Graywacke is a sedimentary rock that typically has a composition of quartz, feldspar, and lithic fragments, characterized by its dark color and coarse texture.