Horizontal Section No. 32 (1854). Untitled. Moel-y-Gwrnedd, Bala LakePen-y-Dall-Gwm, Hirnant, Pen-y-Brwynen, Pen-y-Bylchau, Galt-yr-Aner. Geological Survey of GB. 1st
Horizontal Section No.32 (1854). Untitled. Moel-y-Gwrnedd, Bala LakePen-y-Dall-Gwm, Hirnant, Pen-y-Brwynen, Pen-y-Bylchau, Galt-yr-Aner. Geological Survey of GB. 1st edition. Places in title taken from figure. They do not match the 1934 catalogue description based on the 2nd edition. Located on Old Series one-inchmaps 60nw & ne, 74nw & sw. Hand-coloured engraving 67.5 x 100cm, 1:10,560 scale (6”= 1mile). Flat, linen-taped edge, slightly age-toned, slightly soiled right margin. Library stamp on back. In very good condition.
About England & Wales Sections
These hand-coloured engraved ‘horizontal’ sections at six inch to one mile scale were published in the mid 19th century by the Geological Survey of England and Wales. The detailed profiles generally follow the geological dip on the one inch Old Series maps numbered in the upper right hand margin and the profile locations are shown on these maps which themselves did not include a section.