graywacke
pronunciation
How to pronounce graywacke in British English:
UK ['greɪwæk]
How to pronounce graywacke in American English:
US ['greɪˌwæk]
Word Origin
- graywacke (n.)
- also greywacke, 1806, partial translation of German grauwacke; see gray (adj.) + wacke.
Example
- 1. Petrographic and geochemical characteristics of low-pressure granulite-facies gneisses from the western awulale mountains ( in the western tianshan mountains ) indicate that the protolith was a graywacke , which is featured by proximity of its origin and rapid deposition .