Skip to main content
Glite Dictionary
graywacke

graywacke

1 9.9
A dark, grainy rock made of sand and small stones
  • noun
  • /ˈɡreɪˌwɑːk/
  • Specialized
: graywacke
  • Layers of graywacke can be seen in the exposed rock formations along the coast.

Examples

  • The geologist collected samples of graywacke from the riverbed for analysis.

  • The graywacke was used in the construction of ancient buildings.

  • Many ancient mountain ranges are composed largely of graywacke and other sedimentary rocks.

  • Many geologists study graywackes to understand sedimentary processes.

  • The geologist collected samples of graywacke from the riverbed for analysis.

  • Layers of graywacke can be seen in the exposed rock formations along the coast.

  • Many ancient mountain ranges are composed largely of graywacke and other sedimentary rocks.

Surface Forms

graywacke singular
graywackes plural

Etymology

The word graywacke comes from German Grau- 'gray' and -wacke a name for a mixed, crumbly rock. So, graywacke literally means a 'gray mixed rock', which fits its dark, coarse mix of small rock pieces and sand.