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Excerpt from The Jurassic Rocks of Britain, Vol. 3: The Lias of England and Wales (Yorkshire Excepted) In pursuance of the scheme for completing the Memoirs of the Geological Survey by the publication of stratigraphical monographs of the different geological formations of the British Isles, the task of describing the Jurassic system south of the Humber was entrusted to Mr, H.B. Woodward. The present volume, coming after the two by Mr. Fox-Strangways issued last year, forms the third volume of the Jurassic Monograph, and is the first instalment of Mr. Woodward's work. It is devoted to a detailed account of the Lias. Following out the general plan adopted for these Memoirs, Mr. Woodward has endeavoured to summarise our knowledge of the different subdivisions of the Lis, with especial reference to their stratigraphical variations and their economic products. He has availed himself not only of the information gathered by the officers of the Survey, but of the voluminous Liassic literature which has been published in this country, so as to present a compendium of what is at present known regarding the subject. In tracing the labours of those who preceded the detailed mapping of the-Survey, we may note with some interest that an original sketch-survey, on the one-inch Ordnance maps, was made by William Lonsdalc between 1827 and 1836 over a great partof the area described in the present volume. This early pioneer in British Geology, following the outlines first given by William Smith, and proceeding from near Bath across the Cotteswold district made his way by a series of oblique traverses through the Midland Counties to the Humber. H. E. Strickland also mapped portions of the Lias and New Red Sandstone on the borders of Gloucestershire, Worcestershire, and Warwickshire between the years 1834 and 1837. Shortly afterwards De la Beche in the early days of the Geological Survey, pushed his way from Cornwall and Devon into Somerset and Dorset, and before the year 1839 had begun the official mapping of the Jurassic rocks. 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.
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