. "Glen Lethnot Grit Formation"@en . . . "GLGT"@en . "At least 3000m indicated in Glen Esk; tectonic thickening probably less than in Glen Effock Schist Formation."@en . "Not seen: faulted against Highland Border Complex."@en . "Mixed psammite, semipelite and pelite. Psammites typically gritty. Pelites include types rich in staurolite and muscovite, and some are also kyanite-bearing. Schists rich in iron-ore minerals form mappable units in places. Beds of quartzite with specks of green mica occur rarely near the base of the Formation. "@en . "Pelite, psammite and semipelite with subsidiary schist and trace gritty psammite, mica schist and quartzite. Stratified bedrock. Occurs onshore. Deposited during the Neoproterozoic Era (Precambrian) (1000-541 Ma BP)."@en . "Gradational transition from Glen Effock Schist Formation marked by incoming of silvery muscovite-rich pelite, increase in proportion of gritty psammite and decrease in proportion of green feldspathic semipelite."@en . "Glen Lethnot (Grit) Group [Obsolete: use GLGT]"@en . . . "Glen Lethnot Grits [Obsolete: use GLGT]"@en . . "541.0"^^ . . . . . "1000.0"^^ . "Glen Lethnot Grit Formation"@en . "stable"@en .