. . . . . . . "Alternating units of psammite to quartzite and semipelite to pelite; in places becoming calcareous near the top of the Subgroup. Many of the finer-grained lithologies are flaggy, but in some places this may be a tectonic effect. Succession from Grampian Group into Lochaber Subgroup continuous in some areas, e.g. Schiehallion, Banffshire, but in Glen Spean there may be a tectonically modified unconformity at the base of the Leven Schist."@en . . . . "Incoming of more calcareous sediment, and more graphite in the pelitic and semipelitic rocks, indicating a decrease in the amount of input clastic material."@en . "Variable locally 1500m where untectonised (Lochaber, Banffshire); in Schiehallion district thickness reduced to about 80m, but full succession can still be recognised."@en . . . "Pelite, psammite, quartzite and semipelite and trace calcareous pelite and calcsilicate-rock. Stratified bedrock. Occurs onshore. Deposited during the Neoproterozoic Era (Precambrian) (1000-541 Ma BP)."@en . . . "stable"@en . "Lochaber (Transition) Subgroup [Obsolete: use DALO]"@en . . . . . . . . "Lochaber Subgroup"@en . "DALO"@en . . . . "1000.0"^^ . "Eilde, Binnein and Glen Coe Quartzites [Obsolete: use DALO]"@en . . . . . "Lochaber Subgroup"@en . . . . . . . "Generally sharp transition from underlying Grampian Group, from monotonous psammites, generally flaggy, with thin quartzite and semipelite units to better sorted psammite or quartzite and semipelite or pelite."@en . . . "541.0"^^ .