"80 - 450m"@en . "344.5"^^ . "stable"@en . . "Calcareous mudstone with subsidiary limestone. Stratified bedrock. Occurs onshore. Deposited during the Arundian Substage (Carboniferous Period) (344.5-343 Ma BP)."@en . "Bundoran Shale Formation"@en . . . "Lower Calp Shale of the Calp or Middle Limestone [Obsolete: use BUNS]"@en . . . . "Mudstone, dark grey, calcareous, fossiliferous with thin to thick bioclastic limestones."@en . . . "Increasing silt, mica and sand content in top part of formation, beneath coarse sandstones of basal Dromore Member of the Mullaghmore Sandstone Formation."@en . . "Skea Sandstone Member (basal beds of the formation) rest disconformably on top of Ballyshannon Limestone Formation."@en . "Bundoran Shale Formation"@en . . . . "BUNS"@en . "343.0"^^ .