Horizontal Section No. 4 (1845) From Brecknock, to Cardigan Bay. Geological Survey of GB. 1st edition
Horizontal Section No. 4 (1845) From Mynydd Bwlch-y-groes, Brecknock, to Craig-ddu, Cardigan Bay. Geological Survey of GB. 1st edition. Located on Old Series one-inch maps 41, 42nw, 57se & nw. Hand coloured engraving 67 x99cm, 1:10,560 scale (6”= 1mile), flat. Linen-taped edge, 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.