"Herma Ness Gneiss Member"@en . . . "1000.0"^^ . "Gneissose psammite."@en . . "Herma Ness Gneiss Member"@en . . "stable"@en . "Gneissose psammite. Stratified bedrock. Occurs onshore. Deposited during the Neoproterozoic Era (Precambrian) (1000-541 Ma BP)."@en . "HENG"@en . . . . "541.0"^^ . .