Basalts Borehole sections Carboniferous Cenozoic Copper Dinantian Dolostone deposits Economic geologic map Economic geology Economic geology maps Energy sources Engineering properties Eocene Erlend Complex Exploration Faeroe-Shetland Escarpment Geochemistry Geophysical methods Geophysical surveys Gravity anomalies Gravity methods Holocene Igneous rocks Industrial minerals maps Intrusions Lead Limestone deposits Mafic composition Magnetic anomalies Major elements