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Geology

Select geology ... Agglomerate in neck Andesitic & basaltic lavas & tuffs, undifferentiated Andesitic lava & tuff, undifferentiated Andesitic tuff Anorthosite Ashgill & Caradoc (includes small inliers of Arenig-Llandeilo in Scotland) Basal Conglomerate (including possible Devonian) Basalt Basalt & spilite Basalt & spilite Basalt & spilite Basalt, dolerite, camptonite & allied types Basalt, spilite, hyaloclastic & related tuffs Basaltic tuff Black shale with chert (Upper Dalradian) Boulder bed and conglomerate Contains elements of 72, 73 & 74 Contains elements of 75 & 77 Contains elements of 75 & 77 Contains elements of 75, 77 & 78 Contains elements of 77 & 78 Contains elements of 91, 92 & 93 Contains elements of 94-5 & 96 Cornbrash Diorite & allied intermediate types Durness Limestone (partly Cambrian) Epidiorite, hornblende-schist & allied types Epidote-chlorite-schist, commonly hornblendic-Green beds Epidote-chlorite-schist,commonly hornblendic-Green beds (Upper Dalradian) Foliated granite, syenite & allied types Gabbro & allied types Gneissose granite, granite & pegmatite Granite, syenite, granophyre & allied types Granitic gneiss Graphitic schist & slate Gravel Great & Inferior Oolite including Great Estuarine Series of Scotland Greensand Inter-lava beds Intermediate & basic rock Kimmeridge Clay, Corallian, Oxford Clay & Kellaways Beds Limestone Limestone (Upper Dalradian) Llandovery Llanvirn & Arenig Lough Neagh Clays Lower Lias Lower Old Red Sandstone, including Downtonian Lower Old Red Sandstone, including Downtonian Ludlow Magnesian Limestone (Permian) Marble Metasediments Mica-schist, semi-peltic schist & mixed schists Mica-schist, semi-peltic schist & mixed schists Middle Lias Middle Old Red Sandstone Middle Old Red Sandstone Namurian ("Millstone Grit Series") Permian & Triassic sandstones, undifferentiated, including "Bunter & Keuper" Permian basal breccias, sandstones & mudstones Permian mudstones (including Middle & Upper Marls, Eden & St Bees shales) Pipe-Rock & Basal Quartzite Porphyrite, lamprophyre & allied types Quartz-fledspar-granulite Quartz-mica-schist, grit, slate & phyllite (Upper Dalradian) Quartzite Quartzite grit, interstratified quartzose-mica-schist Quartzose-mica-schist Rhyolite, trachyte & allied types Rhyolite, trachyte & allied types Rhyolite, trachyte & allied types Rhyolite, trachyte, felsite, elvans & allied types Rhyolitic lava Sandstone & grit Serpentine Serpulite Grite & Fucoid Beds Slate, phyllite & mica-schist Slate, phyllite & mica-schist (Upper Dalradian) Tournasian & Visean ("Carboniferous Limestone Series") Triassic mudstones (including "Keuper Marl", Dolomitic Conglomerate & Rhaetic) Tuff (including ignimbrite) Tuff, undifferentiated Tuff, undifferentiated, mainly andesitic Tuff, undifferentiated, mainly basaltic Ultrabasic rock Ultrabasic rock Undifferentiated Undifferentiated gneiss Undifferentiated schist & gneiss of Shetland & Central Tyrone Upper Chalk Upper Lias Upper Old Red Sandstone Wenlock Westphalian & Stephanian, undivided, of "Barren Red" lithology (England only) Westphalian ("Coal Measures")