The Pennine Basin is a sedimentary basin which was active during the Carboniferous Period and which reached from the Southern Uplands of Scotland in the north to the former Wales-London-Brabant Massif in the English Midlands to the south. Sediments deposited within the basin are now exposed at the surface throughout the Pennines but are also present beneath the surface over a much wider area of northern England and indeed into northeast Wales and just across the border into Scotland.