"DUSP"@en . "Drawn at base of meta-spilite of the Dunrossness Spilitic Formation where it rests conformably on pelitic wacke interpreted to belong to the Dunrossness Phyllitic (Formation)."@en . "541.0"^^ . . "Dunrossness Spilitic Group [Obsolete: use DUSP]"@en . . . . . "stable"@en . "Approximately 1000 m."@en . . "Metamorphic rock with subsidiary chert and quartzite and trace graphitic pelite, metalava and metatuff. Stratified bedrock. Occurs onshore. Deposited during the Neoproterozoic Era (Precambrian) (1000-541 Ma BP)."@en . "Dunrossness Spilitic Formation"@en . "Metamorphosed lavas and pyroclastic rocks. The spilites are intercalated with metasediments, mainly graphitic phyllites, quartzites and cherts."@en . . . "1000.0"^^ . "Drawn at unconformable upward passage from meta-spilite of the Dunrossness Spilitic Formation to the Old Red Sandstone."@en . "Dunrossness Spilitic Formation"@en . .