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Excerpt from Reprint of a Report on the Origin, Geological Relations and Composition of the Nickel and Copper Deposits of the Sudbury Mining District, Ontario, Canada In undertaking this new work it was felt that by confining oper ations as closely as possible to the area' characterized by the presence of the sulphide bearing norite and other kindred eruptives a more accurate knowledge would be obtained of the mineralogical com position, structure and age relations of the various rock masses, while at the same time the boundaries between the several formations could be drawn with a much greater degree of precision. 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.