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Excerpt from The Geology of the Country Between York and Hull: Explanation of Quarter-Sheets 93 S. E., 94 S. W., And Part of 86 From the general simplicity of Geological structure in the tracts embraced in quarter-sheets 93 se. And 94 s.w. Of the Geological Survey Map of England and Wales, it has been decided to describe the whole in one Memoir, together with that part of the ground lying north of the Humber, represented in Sheet 86. The region thus united contains about 530 square miles of the south-east of Yorkshire. Its western and largest portion lies in the great plain of York; its central part is formed by the southern prolongation of. The range of chalk hills known as the Wolds; while its eastern part merges into the low grounds of Holderness and the plain of the Humber. The Geological formations represented in this region range from the Trias to the Upper Chalk, and include a series of glacial and post-glacial deposits. The Triassic sandstones are of importance in the district as water-bearing strata; but they are so generally concealed under superficial deposits that they only appear at the surface in occasional small patches, and most of the information regarding them has been obtained from borings and sinkings for water. The Oolites of this district present features of considerable interest. They are separated from the main Oolitic area of Yorkshire by the uprise of the Lower Lias upon which the Chalk directly rests, and they approach in character rather the Lincoln shire than the Yorkshire type. Little of the solid rocks can be seen throughout the district owing to the wide extent of the various superficial accumulations. Hence, although it has been thought desirable to prepare an Edition of the south-eastern quarter of Sheet 93 without the Drifts, for the sake of completing the version of this Sheet which represents the solid geology, it is the Drift Edition which will be found of most service in the field. Some of the clay and sand, mapped as Warp, may not improbably prove to be of glacial age. 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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