Graowacke or Grauwacke: How To spell?
The word Graowacke is misspelled against Grauwacke, a noun meaning "Graywacke."
Word contains consecutive vowels 'AU' in between alphabets gr & wacke is misspelled as 'AO'Wrong Spelling:  gr-ao-wacke  Correct Spelling:  gr-au-wacke 
Find more incorrect spellings of Grauwacke to spell right way.