Pennine Lower Coal MeasuresName
98660Province: Central and northern England, North Wales and the north Isle of Man.
Geologic Age: Bashkirian Age
Other: Mudstone, sandstone and siltstone with subsidiary coal, ironstone and seatearth mudstone and trace calcite-cemented silicate-sandstone (ganister) and seatearth sandstone. Stratified bedrock. Occurs onshore. Deposited during the Langsettian Substage (Carboniferous Period) (319-318 Ma BP). Interbedded grey mudstone, siltstone and pale grey sandstone, commonly with mudstones containing marine fossils in the lower part, and more numerous and thicker coal seams in the upper part. Up to 650m thick in the North Staffordshire (Potteries) Coalfield, and 720m thick in Lancashire. At the base of the dark grey, fissile mudstone of the Subcrenatum Marine Band with eponymous fossils, or at the base of the lowest coal of the coal-bearing sequence if this marker cannot be recognised. Typically, the formation rests conformably upon the Rossendale Formation (Millstone Grit Group). However, in north, west and east Cumbria, the Solway Basin (except the Canonbie area), the Stainmore and Northumberland troughs, on the Alston Block and in northeast Northumberland, the formation overlies conformably the repetitive mudstones, siltstones, sandstones, thin limestones and thin coals of the Stainmore Formation (Yoredale Group). In the Canonbie Coalfield, the formation is underlain unconformably by the Alston Formation (Yoredale Group). At the base of the mudstone of the Vanderbeckei Marine Band with eponymous fossils.
Usage: Current name
