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Regional Geography and Scenery Geological
Ordovician Volcanic Rocks of Tyrone
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Antrim plateau arenaceous Armagh Ballycastle basalt lavas Belfast Borehole calcareous Caledonian Carboniferous Carboniferous rocks Carlingford Carrickmore Chalk clays COAL Coalisland complex conglomerate Cretaceous Dalradian Dalradian rocks deposits dolerite Donegal Dungannon dykes east erosion exposed facies Fault fauna Fermanagh ﬂow folding fossils Geol Geology glacial granite granophyre greywacke grits Highland Border Hill ice-sheet igneous Interbasaltic Bed intrusion Irish Acad Irish Nat known Larne laterite lavas Lias lignite Limestone Londonderry Lough Neagh Lower Basalt magma marls metamorphic rocks metres Moinian mudstones Namurian north Antrim north-east Ireland north-west Northern Ireland occur Old Red Sandstone Ordovician outcrop outlier overlain overlying Plate Portrush probably Proc Quarry Rhaetic rhyolite sands schists sediments seen shales sill Silurian Silurian rocks Sketch-map Slieve Gullion Sperrin Mountains succession Tertiary thick thin Tholeiitic Basalt Triassic tuffs Tyrone Ulster Upper vents Visťan volcanic White Limestone Wilson and Robbie Zone