Memoirs of the Geological Survey of Ireland

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Excerpt from Memoirs of the Geological Survey of Ireland: The Geology of the Country Around Limerick This memoir has been prepared to accompany the new colour-printed map of the Limerick district. The boundaries of the map are shown in fig. 1, p. 1, and include the basin of the Shannon between Adare and Cratloe on the west and Caherconlish and Castleconnell on the east. This area includes nearly the whole of the previously published Sheet 143, and the western part of Sheet 144, of the geological map showing the rocks beneath the "drift." The recent survey had for its object the mapping of the glacial drifts and other superficial deposits which were not included within the scope of the original survey. A general revision of the boundaries to be assigned to the rocks below such deposits was not attempted, but in certain cases, where fresh observation showed the need for an alteration of the line between the limestone and the igneous series, a new line was drawn upon the map. Mr. Kilroe, who has written the account of the "solid" geology of the area, believes that many of the lavas dealt with are intrusive in the masses that surround them, but this does not necessarily remove them from contemporaneity with the general volcanic action that characterised the Limerick district in Carboniferous times. A volcano of the explosive type may thus show, when dissected by denudation, beds of tuff and ash, cut by those parts of the lavas that never reached the surface. Mr. G. W. Lamplugh, as District Geologist, controlled the work in the field, and has contributed a general account of the physical features and the superficial deposits, as well as details of the area personally surveyed by him. Mr. J. R. Kilroe has written on the Economic Geology and the Soils, and Mr. H. J. Seymour has added considerably to our knowledge of the igneous rocks, some of which may be quarried for road-metal. The plates illustrating the memoir are from negatives by Mr. H. J. Seymour. Among the friends who have helped forward the work of the geologists, special thanks are due to Dr. G. Fogarty, R.N., of Limerick. 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.