. "In part tectonic against underlying gneissose psammites and semipelites of Dava Succession - not seen."@en . "1000.0"^^ . . . "stable"@en . "Calcsilicate-rock, gneissose semipelite, pelite, psammite and semipelite with subsidiary calcareous pelite and metacarbonate-rock and trace amphibolite and quartzite. Stratified bedrock. Occurs onshore. Deposited during the Neoproterozoic Era (Precambrian) (1000-541 Ma BP)."@en . "Grantown Formation"@en . "max. 500m"@en . "GTWN"@en . "Weakly gneissose semipelite and subsidiary psammite beds, calc-silicate and metacarbonate rocks."@en . "Grantown Formation"@en . . "541.0"^^ . . "Transitional, with increasing sandy content, up into psammites of the Nethybridge Formation, but contact relations not well exposed."@en . . . .