The Warwickshire coalfield extends between Warwick and Tamworth in the English Midlands . It is about 25 miles (40 km) from north to south and its width is around half that distance. Its western margin is defined by the 'Western Boundary Fault'. In the northeast it abuts against steeply dipping shales of Cambrian age. The larger part of the outcrop at the surface consists of the Warwickshire Group of largely coal-barren red beds . Until its closure in 2013, the Daw Mill mine near Arley within the coalfield, was Britain's biggest coal-producer in the 21st century.
5-583: The principal coal seams within the productive Lower and Middle Coal Measures include (in stratigraphic order i.e. youngest/uppermost first): The Two Yard, Thin Rider, Ryder, Ell, Nine Feet, and High Main merge as one massive bed of coal known as the Thick Coal in parts of the coalfield. Collieries mining in the Warwickshire Coalfield were: This Warwickshire location article
10-615: Is a stub . You can help Misplaced Pages by expanding it . This article about mining is a stub . You can help Misplaced Pages by expanding it . Coal Measures Group The Coal Measures Group is a lithostratigraphical term coined to refer to the coal -bearing succession of rock strata which occur in the United Kingdom within the Westphalian Stage of the Carboniferous Period . The succession
15-722: The Midland Valley Basin of Scotland . These formations lie above the Namurian-age Clackmannan Group and below an unconformity . In those coalfields to the south of the former Wales-Brabant High i.e. the South Wales , Bristol , Somerset , Forest of Dean and concealed Oxfordshire and Kent coalfields, the corresponding group is the South Wales Coal Measures Group. It comprises the: In South Wales,
20-716: The Millstone Grit Group which is of Namurian age. It is succeeded (overlain) by the Warwickshire Group which comprises a largely non-productive sequence of red beds . It comprises the: The 'Pennine Basin' includes all of the coalfields of northern England and the English Midlands together with the Canonbie Coalfield of southern Scotland and the coalfields of northeast Wales and Anglesey . A similar scheme operates in
25-851: Was previously referred to as the 'Productive Coal Measures'. Other than in Northern Ireland the term is now obsolete in formal use and is replaced by the Pennine Coal Measures Group , Scottish Coal Measures Group and the South Wales Coal Measures Group for the three distinct depositional provinces of the British mainland . Within the Pennine Basin the Pennine Coal Measures Group is preceded (underlain) by
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