The following coal seams occur within the
Coal Measures Group in this coalfield. Not all seams are present in any one part of the coalfield:
Middle Coal Measures Formation • (series of unnamed coals) • Brassy • Black Metal • Fireclay • White Metal • Little • Slaty • Tenquarters • Rattler • Bannock Band • Main Band • Lower Metal • Yard Cannel Band • Yard • Lower Yard There is also a Crow seam between the Metal and Bannock seams.
Lower Coal Measures Formation • Half Yard • Two Foot • Little Main • Eighteen Inch • Lickbank • Sixquarters • Parrot • Upper Threequarters Rider • Upper Threequarters • Lower Threequarters • Upper Albrighton • Middle Albrighton • Lower Albrighton • Harrington Four Foot Towards the top of the underlying
Stainmore Formation (or
Hensingham Formation), which is of
Namurian age, are the: • Udale Coal • Bedlam Gill Coal • (unnamed coals) ==See also==