Horizontal Section No. 102 (1874). From Heptonstall Moors, N Todmorden, by Otley and Wharfedale; the Harrrogate Anticlinal, to the neighbourhood of Knaresborough. Geological Survey of GB. 1stHorizontal Section No. 102 (1874). From Heptonstall Moors, N Todmorden, by Otley and Wharfedale; the Harrrogate Anticlinal, to the neighbourhood of Knaresborough. Geological Survey of GB. 1st edition. Located on Old Series one inch maps 88nw, 92se, and 93nw. Hand coloured engraving, 69. 5 x 102cm, 1: 10,560 scale (6= 1mile). Flat, linen taped edges, slightly age toned, clean. In very good condition.