Excerpt from Explanatory Notes to Accompany a New Geological Map of England and Wales Five years ago, Mr. Bartholomew, who had with great labour constructed from the sheets of the Ordnance Survey a general topographical map of England and Wales on the scale of ten miles to an inch, expressed to me his willingness to employ the same plates for the production of a geological map of the country, if I would superintend the reduction from the published maps of the Geological Survey. His map is so good as a general topographical representation Of the country, that it appeared to me likely to prove convenient and useful if the geology were inserted on it. Accordingly, his proposal was eventually carried into effect, and the map so prepared is now issued to the public. While the reduction has been made by Mr. Bartholomew's able assistant, Mr. Bosse, it has been repeatedly revised by some of my colleagues in the Geological Survey, as well as by myself. The late Mr. W. Topley, took a large share in the early stages of this labour, and since his death the task has been carried on by Mr. H. B. Woodward, Mr. W. Gibson, and Mr. W. W. Watts. I have drawn the Sections which are placed round the borders Of the map to explain the geological structure of the country. The following brief Notes are intended merely for the general reader or traveller who may have no special geological knowledge, but may be induced to take the map with him as a convenient guide in journeying across the country. The meaning of the various colours and the nature of the rocks they represent are here briefly explained. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.