Selby Coalfield Wikipedia
Selby coalfield (also known as the Selby complex, or Selby ''superpit'') was a largescale deep underground mine complex based around Selby, North Yorkshire, England, with pitheads at Wistow Mine, Stillingfleet Mine, Riccall Mine, North Selby Mine, Whitemoor Mine and at Gascoigne Wood Mine; all coal was brought to the surface and treated at Gascoigne Wood, being distributed onwards by rail.