“Greywacke is an old term still sometimes used for a particular type of wacke especially in grey-coloured turbidite sequences.”
“The Annascaul Formation is at least 500 m thick, and is dominated by mudrocks with subordinate quartz wacke sandstones, tuffaceous fine conglomerates and melange.”
“The material of the rock here is wacke, in which there are many flints.”