"541.0"^^ . . "Variable, ranges from c.100 to 20m, depending on the structural setting."@en . . "Beinn Udlaidh Quartzite Formation"@en . . "A white to grey quartzite, locally feldspathic. Pebbly beds with clasts up to several centimetres across, are rare. Cross-lamination is only preserved in areas of low strain."@en . . . . "Change from grey to white quartzite upwards to pelite and semipelite of the Leven Schist Formation."@en . "1000.0"^^ . "stable"@en . . . "First occurance of white to grey quartzite feldspathic quartzite above banded to laminated psammite."@en . "BUDQ"@en . "Quartzite with subsidiary feldspathic quartzite. Stratified bedrock. Occurs onshore. Deposited during the Neoproterozoic Era (Precambrian) (1000-541 Ma BP)."@en . "Beinn Udlaidh Quartzite Formation"@en .