. . . "298.9"^^ . "Central Scotland Late Carboniferous Tholeiitic Dyke Swarm"@en . . . "stable"@en . . "330.3"^^ . . . . . "Central Scotland Late Carboniferous Tholeiitic Dyke Swarm"@en . . "CSTD"@en . "Quartz-microgabbro and trace basalt, camptonite, dolerite, microgabbro, microgabbroic-rock, monchiquite, olivine-basalt and olivine-microgabbro. Igneous intrusive bedrock. Occurs both onshore and offshore. Emplaced during the Late Mississippian Epoch - to - Late Pennsylvanian Epoch (Carboniferous Period) (330.3-298.9 Ma BP)."@en . . . . . . "North Britain Late-Carboniferous Tholeiitic Dyke Swarm [Obsolete: use CSTD, NETD]"@en .