Horizontal Section No. 91 (1875). 1. From the Upper Derwent to the Yorkshire Coalfield, to Houghton Common. 2. From Hoyland, across Silkstone, to Newton Colliery near Castleford. Geological Survey of GB. 1stHorizontal Section No. 91 (1875). 1. From the Upper part of the Derwent to the centre of the Yorkshire Coalfield, across Broomhead and Whitwell Moors, Stockbridge, Wortley, Stanborough, Darley Dale, Ardsley and Houghton to Houghton Common. 2. From Hoyland, across Silkstone, Sharlston and Glasshoughton, terminating at Newton Colliery near Castleford. Geological Survey of GB. 1st edition. Located on Old Series one inch maps 81ne, 87nw & sw, and 88se.