greywacke en · NOUN
Pronunciation
- /ˈɡɹeɪ.wæk/ GS
- /ˈɡɹeɪ.wak.ə/ (UK)
- (Southern-England) audio
Etymology
Anglicised form of grauwacke.
Meanings
-
(countable, uncountable) A hard dark sandstone with poorly sorted angular grains of quartz, feldspar, and small rock fragments in a compact, clay-fine matrix.
Endless bleak, rounded hills composed of shales and ribs of tough ‘greywackes’ make up the Southern Uplands – all of such rocks were originally deposited under marine conditions.
2004, Richard Fortey, The Earth, Folio Society, published 2011, page 177:
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| graywacke | alternative | lexicographic | |
| greywackes | Number=Plur | lexicographic |
Deriveds
metagreywacke · metagraywacke · subgreywacke
Translations (5)
mi whatuaho (hard dark sandstone) · pl szarogłaz (hard dark sandstone) · fi grauvakka (hard dark sandstone) · cs droba (hard dark sandstone) · ru граува́кка (hard dark sandstone)